Blainvillea acmella (L.) Philipson, Blumea 6 350 1950. (Syn. Acmella linnaei Cass. [Illegitimate]; Acmella mauritanica Rich.; Bidens acmella (L.) Lam.; Blainvillea alba Edgew.; Blainvillea gayana var. lanceolata Chiov.; Blainvillea hispida Edgew.; Blainvillea latifolia (L.f.) DC.; Blainvillea latifolia var. angustifolia DC.; Blainvillea polycephala Gardner; Blainvillea racemosa Gardner (Unresolved); Blainvillea rhomboidea var. lanceolata (Poir.) DC. ..; Ceratocephalus acmella (L.) Kuntze; Coreopsis acmella (L.) E.H.L.Krause; Eclipta latifolia L.f.; Pyrethrum acmella (L.) Medik.; Spilanthes acmella (L.) Murray; Verbesina acmella L. [Illegitimate]; Verbesina lanceolata Poir. (Unresolved);                           (=) Blainvillea gayana Cass.; (≡) Spilanthes acmella (L.) L.); 
.
¿ blay-en-VIL-lee-uh ? — named for Henri Marie Ducrotay de Blainville, French biologistCalFlora
ak-MEL-uh or AK-mel-uh — little pointDave’s Botanarycommonly known as: annual para cressNative to: n-e tropical Africa, s China, India, Nepal, Sri Lanka; naturalized in paleotropics

Roughly hairy stiff erect herb; lower leaves opposite, upper alternate, ovate to deltate, up to 7 cm long, toothed; heads radiate, 8-12 mm in diam; phyllaries few, outer leaflike; ray usually white, 2-3 lobed, disc 5-merous; achenes 3-angled, inner flattened; pappus of 2-5 unequal bristles. 
…..


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¿ blay-en-VIL-lee-uh ? — named for Henri Marie Ducrotay de Blainville, French biologist, zoologist …
ak-MEL-uh or AK-mel-uh — little point
commonly known as: annual para cress
Native to: n-e tropical Africa, s China, India, Nepal, Sri Lanka;  naturalized in paleotropics
– more views:
Blainvillea acmella (Linnaeus) Philipson, Blumea 6 350 1950.
syn: Verbesina acmella L.; Blainvillea alba Edgew.; Blainvillea platyphylla DC
Roughly hairy stiff erect herb; lower leaves opposite, upper alternate, ovate to deltate, up to 7 cm long, toothed; heads radiate, 8-12 mm in diam; phyllaries few, outer leaflike; ray usually white, 2-3 lobed, disc 5-merous; achenes 3-angled, inner flattened; pappus of 2-5 unequal bristles.
Photographed from near Dakpathar on way to Chakrata. 
Perhaps no other binomial has been so cused as Spilanthes acmella
The name Spilanthes acmella is based on Verbesina acmella L. The combination under Spilanthes appeared in Syst. Veg., ed. 13″ 610 1774. Till recently the combination was attributed to Murray in many reputed books, Floras and databases (The Plant List, eFlora publications,etc.) but as turns out Murray was only the editor of this publication and Linnaeus the author of this combination, which should correctly be cited as Spilanthes acmella (L.) L. Flora of British India recognises four varieties under this: var acmella proper, var. calva, var. oleracea and var. paniculata. Interestingly Koster and Philipson (1950) discovered that the Verbesina acmella L., actually belongs to Blainvillea and should be better known as Blainvillea acmella (L.) Philipson. The other names stay under newly recognised genus Acmella and none (Indian species) under Spilanthes. Incidently also the Blainvillea acmella (L.) Philipson includes another species described in Indian Floras as Blainvillea platyphylla DC. 
The species originally described as Spilanthes may accordingly include following within Indian boundaries:
Blainvillea acmella (L.) Philipson (syn: Verbesina acmella L.; Spilanthes acmella (L.) L.; Blainvillea latifolia (L.f.) DC)
Acmella calva (DC) R. K. Jensen (syn: Spilanthes acmella var. calva (DC.) Clarke ex Hooker f.; Spilanthes javanica Sch.Bip. ex Miq.)
 
Acmella ciliata (Kunth) Cass. (syn: Spilanthes ciliata Kunth.)
 
Acmella oleracea (L.) R. K. Jensen (syn: Spilanthes acmella var. oleracea (L.) C.B.Clarke ex Hook.f.; Spilanthes oleracea L.)
 
Acmella paniculata (Wall. ex DC) R. K. Jensen (syn: Spilanthes acmella var. paniculata (Wall. ex DC.) C.B. Clarke ex Hook. f.; Spilanthes paniculata Wall. ex DC.
 
Acmella radicans (Jacq.) R. K. Jensen var. radicans (syn: Spilanthes radicans Jacq.)
The following key can help differentiating species
 
1a. Heads with white ray florets, achenes 3-angled…………………………………………………. Blainvillea acmella
1b. Heads discoid or with yellow ray florets, achenes flattened…………………………………..(2)
2a. Heads discoid……………………………………………………………………………………………(3)
2b. Heads radiate, ray florets very small, achenes ciliate, pappus of 2-3 bristles……………..(7)
3a. Corolla white, greenish white or with purple tinge, 4-merous, pappus of 2-3 bristles….Acmella radicans var. radicans
3b. Corolla pale yellow, yellow or orange yellow………………………………………………………..(4)
4a. Pappus absent; stems decumbent, rooting at nodes; leaves ovate, ahenes 1.7-2.2 mm,
glabrous, if sparsely hairy then hairs hooked ………………………………………………………..Acmella calva
4b. Pappus of 2-3 bristles, achenes hairy, hairs straight, stems erect without nodal roots…….(5)
5a. Mature achenes with cork-like margin; surface tuberculate……………………………………….Acmella paniculata
5b. Mature achenes without cork-like margin; surface not tuberculate………………………………(6)
6a. Corolla (disc floret) 4-merous, phyllaries 5-6, uniseriate, heads 5.8-8 mm high,
4-6 mm diam.,receptacle 3-6 mm high…………………………………………………………………Acmella uliginosa
6b. Corolla 5-merous, phyllaries 15-18, triseriate, heads 8-23 mm high, 6-17 mm diam.,
receptacle 6-21 mm high, leaves ovate-deltate……………………………………………………….Acmella oleracea
7a. Mature achenes with evident cork-like margin; disc corolla 5-merous; heads
ovoid; leaves broadly ovate with rounded to cordate base; phyllaries 7-10, biseriate;
heads 6-10 mm high, 6-9 mm in diam, receptacle 4-8 mm high…………………………………..Acmella ciliata
7b. Mature achenes without cork-like margin; disc corolla 4-merous, heads cone-shaped;
leaves elliptic to narrowly ovate, cuneate at base; phyllaries 5-6, heads 5.8-8 mm high,
4-6 mm diam.,receptacle 3-6 mm high………………………………………………………………….Acmella uliginosa
I will be uploading Blainvillea acmella, Acmella ciliata, Acmella ciliata, A. uliginosa and A. oleracea
Other friends may try to upload Acmella calva, Acmella paniculata and Acmella rdicans, which are available especially in Mysore and other parts of Karnataka

I am uploading this key in the website also for convenience.


Very nice description with detailed keys.

yes, to me also Blainvillea acmella (L.) Philip.

Syn: Verbesina acmella L.; Blainvillea latifolia (L. f.) DC.; Eclipta latifolia L. f.; Blainvillea rhomboidea Cass.

Anyway it is not coming under the genus Spilanthes (Syn: Acmella).



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Wild Flower for ID – Acmella species? – 240112 – RK:  Is this Acmella ? Request Bot & Common ID. Pics taken in
Lakkavally, Karnataka
on 08-01-12 at 10am. Around 4’high.


To me it appears like Blainvillea acmella


I think you mean spilanthes acmella ?


Please go through following mail of mine

/


Spilanthes acmella confusion: 1-Blainvillea acmella from near Dakpathar: Blainvillea acmella (Linnaeus) Philipson, Blumea 6 350 1950.
syn: Verbesina acmella L.; Blainvillea alba Edgew.; Blainvillea platyphylla DC
Roughly hairy stiff erect herb; lower leaves opposite, upper alternate, ovate to deltate, up to 7 cm long, toothed; heads radiate, 8-12 mm in diam; phyllaries few, outer leaflike; ray usually white, 2-3 lobed, disc 5-merous; achenes 3-angled, inner flattened; pappus of 2-5 unequal bristles.
Photographed from near Dakpathar on way to Chakrata.
Perhaps no other binomial has been so confused as Spilanthes acmella
The name Spilanthes acmella is based on Verbesina acmella L. The combination under Spilanthes appeared in Syst. Veg., ed. 13″ 610 1774. Till recently the combination was attributed to Murray in many reputed books, Floras and databases (The Plant List, eFlora publications,etc.) but as turns out Murray was only the editor of this publication and Linnaeus the author of this combination, which should correctly be cited as Spilanthes acmella (L.) L. Flora of British India recognises four varieties under this: var acmella proper, var. calva, var. oleracea and var. paniculata. Interestingly Koster and Philipson (1950) discovered that the Verbesina acmella L., actually belongs to Blainvillea and should be better known as Blainvillea acmella (L.) Philipson. The other names stay under newly recognised genus Acmella and none (Indian species) under Spilanthes. Incidently also the Blainvillea acmella (L.) Philipson includes another species described in Indian Floras as Blainvillea platyphylla DC. The species originally described as Spilanthes may accordingly include following within Indian boundaries:
Blainvillea acmella (L.) Philipson (syn: Verbesina acmella L.; Spilanthes acmella (L.) L.; Blainvillea latifolia (L.f.) DC)
Acmella calva (DC) R. K. Jensen (syn: Spilanthes acmella var. calva (DC.) Clarke ex Hooker f.; Spilanthes javanica Sch.Bip. ex Miq.)
 
Acmella ciliata (Kunth) Cass. (syn: Spilanthes ciliata Kunth.)
 
Acmella oleracea (L.) R. K. Jensen (syn: Spilanthes acmella var. oleracea (L.) C.B.Clarke ex Hook.f.; Spilanthes oleracea L.)
 
Acmella paniculata (Wall. ex DC) R. K. Jensen (syn: Spilanthes acmella var. paniculata (Wall. ex DC.) C.B. Clarke ex Hook. f.; Spilanthes paniculata Wall. ex DC.
 
Acmella radicans (Jacq.) R. K. Jensen var. radicans (syn: Spilanthes radicans Jacq.)
 
The following key can help differentiating species
 
1a. Heads with white ray florets, achenes 3-angled…………………………………………………. Blainvillea acmella
1b. Heads discoid or with yellow ray florets, achenes flattened…………………………………..(2)
2a. Heads discoid……………………………………………………………………………………………(3)
2b. Heads radiate, ray florets very small, achenes ciliate, pappus of 2-3 bristles……………..(7)
3a. Corolla white, greenish white or with purple tinge, 4-merous, pappus of 2-3 bristles………..Acmella radicans var. radicans
3b. Corolla pale yellow, yellow or orange yellow………………………………………………………..(4)
4a. Pappus absent; stems decumbent, rooting at nodes; leaves ovate, ahenes 1.7-2.2 mm,
glabrous, if sparsely hairy then hairs hooked ………………………………………………………..Acmella calva
4b. Pappus of 2-3 bristles, achenes hairy, hairs straight, stems erect without nodal roots…….(5)
5a. Mature achenes with cork-like margin; surface tuberculate……………………………………….Acmella paniculata
5b. Mature achenes without cork-like margin; surface not tuberculate………………………………(6)
6a. Corolla (disc floret) 4-merous, phyllaries 5-6, uniseriate, heads 5.8-8 mm high,
4-6 mm diam.,receptacle 3-6 mm high…………………………………………………………………Acmella uliginosa
6b. Corolla 5-merous, phyllaries 15-18, triseriate, heads 8-23 mm high, 6-17 mm diam.,
receptacle 6-21 mm high, leaves ovate-deltate……………………………………………………….Acmella oleracea
7a. Mature achenes with evident cork-like margin; disc corolla 5-merous; heads
ovoid; leaves broadly ovate with rounded to cordate base; phyllaries 7-10, biseriate;
heads 6-10 mm high, 6-9 mm in diam, receptacle 4-8 mm high…………………………………..Acmella ciliata
7b. Mature achenes without cork-like margin; disc corolla 4-merous, heads cone-shaped;
leaves elliptic to narrowly ovate, cuneate at base; phyllaries 5-6, heads 5.8-8 mm high,
4-6 mm diam.,receptacle 3-6 mm high………………………………………………………………….Acmella uliginosa
I will be uploading Blainvillea acmella, Acmella ciliata, Acmella ciliata, A. uliginosa and A. oleracea
Other friends may try to upload Acmella calva, Acmella paniculata and Acmella rdicans, which are available especially in Mysore and other parts of Karnataka

I am uploading this key in the website also for convenience.


Very nice description with detailed keys.

yes, to me also Blainvillea acmella (L.) Philip.

Syn: Verbesina acmella L.; Blainvillea latifolia (L. f.) DC.; Eclipta latifolia L. f.; Blainvillea rhomboidea Cass.

Anyway it is not coming under the genus Spilanthes (Syn: Acmella).


Although not given in the original key of Acmella Monograph by Jansen, but in the description is mentioned that heads of Acmella calva are mostly discoid but may be rarely radiate. I have as such modified the key for Indian species to accomodate this. This is also available on our website:

The following key can help differentiating species in India of species earlier treated under Spilanthes
1a. Heads with white ray florets, achenes 3-angled…………. Blainvillea acmella
1b. Heads discoid or with yellow ray florets, achenes flattened………………..(2)
2a. Heads discoid………………………………………………………………………..(3)
2b. Heads radiate, ray florets very small, achenes ciliate,
pappus of 2-3 bristles……………………………………………………………….(7)
3a. Corolla white, greenish white or with purple tinge, 4-merous, pappus of 2-3 bristles…………………………..Acmella radicans var. radicans
3b. Corolla pale yellow, yellow or orange yellow…………………………………..(4)
4a. Pappus absent; stems decumbent, rooting at nodes; leaves ovate, ahenes 1.7-2.2 mm, glabrous, if sparsely hairy then
hairs hooked ………………………………………………………………Acmella calva
4b. Pappus of 2-3 bristles, achenes hairy, hairs straight, stems
erect without nodal roots……………………………………………………………(5)
5a. Mature achenes with cork-like margin; surface tuberculate…………………………………………………………..Acmella paniculata
5b. Mature achenes without cork-like margin; surface not tuberculate……….(6)
6a. Corolla (disc floret) 4-merous, phyllaries 5-6, uniseriate, heads 5.8-8 mm high, 4-6 mm diam.,receptacle 3-6 mm high…..Acmella uliginosa
6b. Corolla 5-merous, phyllaries 15-18, triseriate, heads 8-23 mm high, 6-17 mm diam., receptacle 6-21
mm high, leaves ovate-deltate………………………………….Acmella oleracea
7a. Mature achenes with evident cork-like margin; disc corolla 5-merous; heads ovoid; leaves broadly ovate with
rounded to cordate base; phyllaries 7-10, biseriate; heads 6-10 mm high, 6-9 mm in diam, receptacle 4-8 mm
high……………………………………………………………………Acmella ciliata
7b. Mature achenes without cork-like margin; leaf base cuneate……………..(8)
8a. Disc corolla 4-merous, heads cone-shaped; leaves elliptic to narrowly ovate, cuneate at base; phyllaries 5-6, heads
5.8-8 mm high, 4-6 mm diam. receptacle 3-6 mm high; achenes 1.2-1.8 mm long, ciliate with straight hairs; pappus of two unequal or subequal bristles, one up to 0.7 mm long second up to 0.5 mm long……………………..Acmella uliginosa

8b. Disc corolla 5-merous; phyllaries 8-11, biseriate; heads 7.5-11.5 mm high, 6-8.5 mm diam, receptacle 5-8.5 mm high; achenes ahenes 1.7-2.2 mm, glabrous, if sparsely hairy then hairs hooked; pappus absent………Acmella calva



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7 images. 6 posts by 5 authors.
Blainvillea acmella (L.) Philipson
¿ blay-en-VIL-lee-uh ? — named for Henri Marie Ducrotay de Blainville, French biologistCalFlora
ak-MEL-uh or AK-mel-uh — little pointDave’s Botanary
commonly known as: annual para cress
Native to: n-e tropical Africa, s China, India, Nepal, Sri Lanka; naturalized in paleotropics
References: Flowers of IndiaNPGS / GRINFlora of China

at Vaghbil, Thane on 19 SEP 09


Very good find. Clear pictures too.

I can see opposite leaves ovate rhomboid. which are hispid(?)

Heads which are yellow or white (Here) 0.5-1cm in diameter in axillary and terminal cymes with long peduncles. Pappus is supposed to be characteristic : of 1-3 weak bristles;



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Asteraceae Fortnight Part I-Radiate heads: NS 04 :  Attachments (4). 3 posts by 2 authors.

This plant was shot from Morni Hills.. pics are poor..

Blainvillea acmella (Linn.) Philipson, Blumea 6: 350, 1950;

An erect, stiff, pubescent herb, 30-60 cm high, leaves 7×6 cm, hisppid, crenate-serrate, heads radiate shortly peduncled, recceptacle scaly, flowers whitish, achenes curved..



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Asteraceae Fortnight Part 1-Radiate Heads: Spilanthes acmella confusion: 1-Blainvillea acmella from near Dakpathar :  Attachments (3). 3 posts by 3 authors.

Blainvillea acmella (Linnaeus) Philipson, Blumea 6 350 1950.

syn: Verbesina acmella L.; Blainvillea alba Edgew.; Blainvillea platyphylla DC
Roughly hairy stiff erect herb; lower leaves opposite, upper alternate, ovate to deltate, up to 7 cm long, toothed; heads radiate, 8-12 mm in diam; phyllaries few, outer leaflike; ray usually white, 2-3 lobed, disc 5-merous; achenes 3-angled, inner flattened; pappus of 2-5 unequal bristles.
Photographed from near Dakpathar on way to Chakrata.
Perhaps no other binomial has been so confused as Spilanthes acmella
The name Spilanthes acmella is based on Verbesina acmella L. The combination under Spilanthes appeared in Syst. Veg., ed. 13″ 610 1774. Till recently the combination was attributed to Murray in many reputed books, Floras and databases (The Plant List, eFlora publications,etc.) but as turns out Murray was only the editor of this publication and Linnaeus the author of this combination, which should correctly be cited as Spilanthes acmella (L.) L. Flora of British India recognises four varieties under this: var acmella proper, var. calva, var. oleracea and var. paniculata. Interestingly Koster and Philipson (1950) discovered that the Verbesina acmella L., actually belongs to Blainvillea and should be better known as Blainvillea acmella (L.) Philipson. The other names stay under newly recognised genus Acmella and none (Indian species) under Spilanthes. Incidently also the Blainvillea acmella (L.) Philipson includes another species described in Indian Floras as Blainvillea platyphylla DC. The species originally described as Spilanthes may accordingly include following within Indian boundaries:
Blainvillea acmella (L.) Philipson (syn: Verbesina acmella L.; Spilanthes acmella (L.) L.; Blainvillea latifolia (L.f.) DC)
Acmella calva (DC) R. K. Jensen (syn: Spilanthes acmella var. calva (DC.) Clarke ex Hooker f.; Spilanthes javanica Sch.Bip. ex Miq.)
Acmella ciliata (Kunth) Cass. (syn: Spilanthes ciliata Kunth.)
Acmella oleracea (L.) R. K. Jensen (syn: Spilanthes acmella var. oleracea (L.) C.B.Clarke ex Hook.f.; Spilanthes oleracea L.)
Acmella paniculata (Wall. ex DC) R. K. Jensen (syn: Spilanthes acmella var. paniculata (Wall. ex DC.) C.B. Clarke ex Hook. f.; Spilanthes paniculata Wall. ex DC.
Acmella radicans (Jacq.) R. K. Jensen var. radicans (syn: Spilanthes radicans Jacq.)
The following Key is on our website
The following key can help differentiating species in India of species earlier treated under Spilanthes
1a. Heads with white ray florets, achenes 3-angled…………. Blainvillea acmella
1b. Heads discoid or with yellow ray florets, achenes flattened………………..(2)
2a. Heads discoid………………………………………………………………………..(3)
2b. Heads radiate, ray florets very small, achenes ciliate, pappus of 2-3 bristles……………………………………………………………(7)
3a. Corolla white, greenish white or with purple tinge, 4-merous, pappus of 2-3 bristles……….Acmella radicans var. radicans
3b. Corolla pale yellow, yellow or orange yellow…………………………………..(4)
4a. Pappus absent; stems decumbent, rooting at nodes; leaves ovate, ahenes 1.7-2.2 mm, glabrous, if sparsely hairy then
hairs hooked ………………………………………………………………Acmella calva
4b. Pappus of 2-3 bristles, achenes hairy, hairs straight, stems erect without nodal roots …………………………………………..(5)
5a. Mature achenes with cork-like margin; surface tuberculate………………………………………………………….Acmella paniculata
5b. Mature achenes without cork-like margin; surface not tuberculate……….(6)
6a. Corolla (disc floret) 4-merous, phyllaries 5-6, uniseriate, heads 5.8-8 mm high, 4-6 mm diam.,receptacle 3-6 mm high…..Acmella uliginosa
6b. Corolla 5-merous, phyllaries 15-18, triseriate, heads 8-23 mm high, 6-17 mm diam., receptacle 6-21
mm high, leaves ovate-deltate………………………………….Acmella oleracea
7a. Mature achenes with evident cork-like margin; disc corolla 5-merous; heads ovoid; leaves broadly ovate with
rounded to cordate base; phyllaries 7-10, biseriate; heads 6-10 mm high, 6-9 mm in diam, receptacle 4-8 mm
high……………………………………………………………………Acmella ciliata
7b. Mature achenes without cork-like margin; leaf base cuneate……………..(8)
8a. Disc corolla 4-merous, heads cone-shaped; leaves elliptic  to narrowly ovate, cuneate at base; phyllaries 5-6, heads
5.8-8 mm high, 4-6 mm diam. receptacle 3-6 mm high; achenes 1.2-1.8 mm long, ciliate with straight hairs;
pappus of two unequal or subequal bristles, one up to 0.7 mm long second up to 0.5 mm long…………….Acmella uliginosa
8b. Disc corolla 5-merous; phyllaries 8-11, biseriate; heads 7.5-11.5 mm high, 6-8.5 mm diam, receptacle 5-8.5 mm high; achenes ahenes 1.7-2.2 mm, glabrous, if sparsely hairy then hairs hooked; pappus absent………Acmella calva


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Blainvillea acmella at Pachmarhi :: 18 SEP 13 :: DV :   3 images. 3 posts by 2 authors.
Pachmarhi about 3600 feet ft asl
Date / Time: 18 SEP 13 at 08:39 AM Altitude: about 3568 ft asl

Blainvillea acmella (L.) Philipson … (family: Asteraceae)


Nice Shots … You could find many plants there. Last time (December 11) when i was there in this area very less vegetation were in flowering.



Talegaon Dabhade Pune
Sep 2015

Requesting to Id this small wild shrub with very tiny flowers


Blainvillia acmella



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Compositae herb for ID :: MK003 SEP2016 : 2 posts by 2 authors. Attachments (5)
Please help me to identify this Asteraceae herb of height 2 feet.
Habitat: near agricultural fields and fallow
Alt.: 129 m asl
Date: 20 July 2016

Place: Palakkad Dist., Kerala


Blainvillea acmella (L.) Philipson



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25th August, 2009- Sanjay Gandhi National Park; at Phansad WLS- Sept’09?; on hill top of ‘chikkadevammana betta’, saraguru, Mysore district on 13 12 09; Masinagudi village in Nilgiris of TN: 09 May 2010; 

 


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