{"id":1353867,"date":"2011-10-29T09:02:13","date_gmt":"2011-10-29T09:02:13","guid":{"rendered":""},"modified":"2024-12-24T13:06:29","modified_gmt":"2024-12-24T07:36:29","slug":"conyza-canadensis","status":"publish","type":"ht_kb","link":"https:\/\/efloraofindia.com\/efi\/conyza-canadensis\/","title":{"rendered":"Conyza canadensis"},"content":{"rendered":"
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Conyza<\/i> canadensis<\/i> (L.) Cronquist<\/span><\/a>, Bull. Torrey Bot. Club 70 632 1943<\/i>. (Syn: Aster<\/i> canadensis<\/i> (L.) E.H.L.Krause<\/span><\/a> [Illegitimate]; Caenotus<\/i> canadensis<\/i> (L.) Raf.<\/span><\/a>; Caenotus<\/i> pusillus<\/i> (Nutt.) Raf.<\/span><\/a>; Conyza<\/i> canadensis<\/i> var. glabrata<\/i> (A.Gray) Cronquist<\/span><\/a>; Conyzella<\/i> canadensis<\/i> (L.) Rupr.<\/span><\/a>; Erigeron<\/i> canadense<\/i> var. pusillus<\/i> (Nutt.) B.Boivin<\/span><\/a>; Erigeron<\/i> canadensis<\/i> L.<\/span><\/a>; Erigeron<\/i> canadensis<\/i> f. coloratus<\/i> Fassett<\/span><\/a>\u00a0……; Erigeron<\/i> myriocephalus<\/i> Rech.f. & Edelb.<\/span><\/a>; Erigeron<\/i> setiferus<\/i> Post ex Boiss.<\/span><\/a>; Erigeron<\/i> strictus<\/i> DC.<\/span><\/a>; Leptilon<\/i> canadense<\/i> (L.) Britton & A.Br.<\/span><\/a>; Leptilon<\/i> pusillum<\/i> (Nutt.) Britton<\/span><\/a>; Marsea<\/i> canadensis<\/i> (L.) V.M.Badillo<\/span><\/a>; Senecio<\/i> ciliatus<\/i> Walter<\/span><\/a>; Trimorpha<\/i> canadensis<\/i> (L.) Lindm.<\/span><\/a>);<\/div>\n
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Annual herb, 50 cm to 2 m tall, branched mostly in upper part; leaves oblanceolate to linear, ciliolate along margin and hispid on nerves; heads small, 3-4 mm across, in branched panicles; ray florets white, disc florets yellow; phyllaries glabrous to strigose.
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\n<\/span>The plant can be easily differentiated from<\/span> related C. bonariensis<\/i> <\/span>by its strict habit, numerous small heads and distinct white ray florets.<\/span>
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As per efi thread<\/a>:<\/div>\n
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1a. Plants usually shorter than 50 cm; lateral branches equalling or overtopping main axis; heads 5-8 mm across; ray corolla shorter than 0.3 mm; fruiting head 8-10 mm across, pappus 3-4 mm long; lower leaves\u00a0<\/span> linear-lanceolate, upper linear………Conyza bonariensis<\/b><\/span><\/div>\n
1b. Plants usually taller than 50 cm; lateral branches shorter than main axis; heads less than 6 mm across;<\/span> lower leaves lanceolate or oblanceolate, upper linear-lanceolate….. (2)
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2a. Ray corolla shorter than 0.3 mm; heads 4-6 mm across; fruiting head 7-8 mm across, pappus 3-4 mm\u00a0<\/span> long; lower leaves oblanceolate, upper linear-lanceolate; plants densely hairy, phyllaries short <\/span>hairy…….<\/span>Conyza sumatrensis<\/b><\/div>\n
2b. Ray corolla 0.3-1 mm long; heads 2-4 mm across; fruiting head 5-6 mm across, pappus 2-3 mm long;\u00a0<\/span> leaves lanceolate; plants sparsely hairy; phyllaries with few long hairs….Conyza canadensis<\/b><\/span><\/div>\n<\/div>\n<\/div>\n
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\"\/wp-content\/uploads\/2020\/10\/Conyza-canadensis-Botanical%20garden-Kashmir-1.jpg\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Conyza-canadensis-Balgarden-Kashmir-2.jpg\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Conyza-canadensis-Balgarden-Kashmir-3.jpg\"<\/a>
\nConyza canadensis from Kashmir<\/a>:\u00a0\u00a0Conyza canadensis<\/i><\/b> (L.) Cronquist, Bull. Torrey Bot. Club 70:632. 1943
\nsyn: Erigeron canadensis<\/i> L.<\/p>\n<\/div>\n

Common names: butterweed, Canadian horseweed, Canadian-fleabane, hogweed, horseweed<\/b><\/div>\n
Annual herb, 50 cm to 2 m tall, branched mostly in upper part; leaves oblanceolate to linear, ciliolate along margin and hispid on nerves; heads small, 3-4 mm across, in branched panicles; ray florets white, disc florets yellow; phyllaries glabrous to strigose.<\/span><\/div>\n
The plant can be easily differentiated from<\/span> related C. bonariensis<\/i> <\/span>by its strict habit, numerous small heads and distinct white ray florets.<\/span><\/div>\n
Photographed from Balgarden Srinagar and Botanical Garden below Cheshmashahi, both in Kashmir<\/span>.<\/div>\n
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Asteraceae Fortnight Part 1-Radiate heads:: Conyza canadensis from Kashmir-GS9<\/span><\/a>\u00a0:\u00a0\u00a0Attachments (3).\u00a0\u00a02 posts by 2 authors.<\/div>\n
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Conyza canadensis<\/b><\/i> (L.) Cronquist, Bull. Torrey Bot. Club 70:632. 1943 <\/span><\/span>syn: Erigeron canadensis<\/i> <\/span>L.<\/span>
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Common names: butterweed, Canadian horseweed, Canadian-fleabane, hogweed, horseweed<\/span><\/b><\/span>
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Annual herb, 50 cm to 2 m tall, branched mostly in upper part; leaves oblanceolate to linear, ciliolate along margin and hispid on nerves; heads small, 3-4 mm across, in branched panicles; ray florets white, disc florets yellow; phyllaries glabrous to strigose.
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The plant can be easily differentiated from<\/span> related C. bonariensis<\/i><\/span> by its strict habit, numerous small heads and distinct white ray florets.<\/span><\/span><\/div>\n
Photographed from Balgarden Srinagar and Botanical Garden below Cheshmashahi, both in Kashmir.<\/span><\/div>\n<\/div>\n<\/div>\n
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\"\/wp-content\/uploads\/2020\/10\/IMG_6353Sm.JPG\"<\/a><\/div>\n
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\"\/wp-content\/uploads\/2020\/10\/IMG_6352Sm.JPG\"<\/a><\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

26072011-BS-001 A wild herb for id from Samalkha Panipat<\/a>:\u00a0\u00a0\u00a0Pls ID this wild herb about 4 ft high.<\/span>
\nLooks asteraceae<\/i> member
\nshot from unattended area of Bel pattar Herbal Garden Samalkha Panipat<\/span>
\nno flowers fruits seen
\nShot on 28-6-11<\/p>\n<\/div>\n

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It appears to be Conyza bonariensis<\/i><\/div>\n
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Without flower, hmmm it is difficult, I guess. Anyway it is a species of Conyza<\/i>.
\nWas the plant covered by stiff hairs?
\nIs there any difference in the leaves at the base of the stem?
\nLet us wait to hear from\u00a0….<\/p>\n<\/div>\n

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I would comment only after seeing it flower. Species of Conyza<\/i> are often deceptive in vegetative condition. There are similar plants here also in Kashmir. I am waiting for them to flower.<\/p>\n

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Yes I have seen it<\/span> flowering it a lot in August and September in Kashmir, Jammu<\/span> and along National highway 1. It is Conyza canadensis<\/i>. C. bonariensis<\/i> is a much shorler plant, narrow leaves and flowering earlier<\/span>.<\/p>\n

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\"\/wp-content\/uploads\/2020\/10\/Conyza%20canadensis%20-6-.JPG\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Conyza%20canadensis%20-4-.JPG\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Conyza%20canadensis%20-3-.JPG\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Conyza%20canadensis%20-5-.JPG\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Conyza%20canadensis%20-1-.JPG\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Conyza%20canadensis%20-2--9.JPG\"<\/a><\/p>\n<\/div>\n

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Flora of Chakrata: Conyza canadensis from Herbal Garden Deovan Chakrata<\/a>:\u00a0Conyza canadensis<\/i> from Herbal Garden Deovan Chakrata<\/span>
\nThanks to … Sir for briefing us about different sp of Conyza<\/i> during this Tour<\/p>\n

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\"\/wp-content\/uploads\/2020\/10\/Conyza-canadensis-Balgarden-Kashmir-3-2.jpg\"<\/a><\/div>\n
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Small flowered conyza species: 1. Conyza canadensis from Kashmir:<\/a> Conyza canadensis<\/b><\/i> (L.) Cronq., Bull. Torrey Bot. Club. 70: 632. 1943 <\/span>syn: <\/span>Erigeron<\/i> canadensis<\/i> L.<\/span>
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Photographed from Srinagar Kashmir<\/span>. Notice slender habit, taller plants and smaller heads.<\/span> Details already given in the key.<\/span><\/div>\n
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\"\/wp-content\/uploads\/2020\/10\/IMG_2119.jpg\"<\/a><\/div>\n
\"\/wp-content\/uploads\/2020\/10\/IMG_2122.jpg\"<\/a><\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

VOF Week: Asteraceae sp-6 from Joshimath:<\/a>\u00a0\u00a0This is one more herb of Asteraceae<\/i> looking some what similar to Conyza bonariensis<\/i> …
\nLocation: Joshimath<\/span>.<\/p>\n

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I hope Conyza canadensis<\/i><\/p>\n<\/div>\n<\/div>\n

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Pl. note smaller almost cylindrical heads and larger ray florets.<\/span><\/p>\n

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\"\/wp-content\/uploads\/2020\/10\/IMG_2121.jpg\"<\/a>\"\/wp-content\/uploads\/2020\/10\/IMG_2120.jpg\"<\/a>\"\/wp-content\/uploads\/2020\/10\/IMG_2117.jpg\"<\/a>\"\/wp-content\/uploads\/2020\/10\/IMG_2118.jpg\"<\/a><\/div>\n
Asteraceae Week (Part I – Radiate heads) ::Conyza canadensis from Joshimath :: PKA30::<\/a> :\u00a0Attachments (6). 3 posts by 2 authors.<\/div>\n
Conyza canadensis<\/i> from Joshimath.<\/span><\/div>\n
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\u00a0<\/span><\/p>\n<\/div>\n

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\"\/wp-content\/uploads\/2020\/10\/Conyza%20canadensis%20-5--2.JPG\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Conyza%20canadensis%20-6--0.JPG\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Erigeron%20canadensis%20-5-.JPG\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Erigeron%20canadensis%20-4-.JPG\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Erigeron%20canadensis%20-1-.JPG\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Conyza%20canadensis%20-2-.JPG\"<\/a>\"\/wp-content\/uploads\/2020\/10\/Conyza%20canadensis%20-1--0.JPG\"<\/a><\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Asteraceae Fortnight Part I-Radiate Heads: Conyza canadensis from Chakrata and VOF – NS 57<\/a> : Attachments (7). 2 posts by 2 authors.<\/p>\n<\/div>\n

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This was shot from some locations in Chakrata and VOF Route<\/span>.. I hope they all belong to Conyza canadensis<\/i>.. please help to id..<\/p>\n

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Yes … Nice photographs.<\/p>\n

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\"\/wp-content\/uploads\/2020\/10\/m_DSCN6951.jpg\"<\/a><\/a>\"\/wp-content\/uploads\/2020\/10\/m_DSCN6955.jpg\"<\/a>\"\/wp-content\/uploads\/2020\/10\/m_DSCN6949.jpg\"<\/a>\"\/wp-content\/uploads\/2020\/10\/m_DSCN6947.jpg\"<\/a><\/a><\/p>\n<\/div>\n

PM 2 29-09-2017 Asteraceae member id from chandigarh<\/a>\u00a0: 3 posts by 2 authors. Attachments (6)<\/span><\/div>\n
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Habit- small herb<\/span><\/span><\/p>\n

leaves- small, linear to lanceolate present in tuft of 5-6 all along the stem<\/span><\/div>\n
Inflorescenece-\u00a0 axillary cyme<\/span><\/div>\n
Habitat- wild<\/span><\/div>\n
Locality- Chandigarh<\/span><\/div>\n
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Date- 22-09-2017<\/span><\/p>\n

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Erigeron canadensis<\/i>…<\/span><\/div>\n
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Plant of Indonesia: Asteraceae 1<\/a>\u00a0: 3 posts by 3 authors.\u00a0Attachments\u00a0(1)<\/span><\/div>\n
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A kind of\u00a0Asteraceae<\/i>\u00a0of\u00a0Mt Slamet ca 2000 m alt.<\/span>\u00a0 ID is requested.<\/p>\n

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Conyza<\/i>\u00a0sp. probably\u00a0<\/span>bonariensis<\/i><\/p>\n<\/div>\n

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Images of this species at<\/span>\u00a0<\/span>Conyza bonariensis<\/i><\/span><\/a>\u00a0<\/span><\/p>\n<\/div>\n

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Smaller heads and ray florets suggest I. canadensis<\/em><\/p>\n

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I guess this should be\u00a0Erigeron\u00a0bonariensis\u00a0<\/i>L. Syn :\u00a0Conyza\u00a0bonariensis\u00a0<\/i>(L.)\u00a0Cronquist\u00a0!<\/p>\n

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I will go with … for Conyza canadensis<\/em>\u00a0(L.) Cronquist<\/a>\u00a0rather than\u00a0Conyza bonariensis<\/em>\u00a0(L.) Cronquist<\/a><\/p>\n

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References:<\/div>\n
http:\/\/www.theplantlist.org\/tpl\/record\/gcc-90828<\/span><\/a><\/div>\n<\/div>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Conyza canadensis (L.) Cronquist, Bull. Torrey Bot. Club 70 632 1943. (Syn: Aster canadensis (L.) E.H.L.Krause [Illegitimate]; Caenotus canadensis (L.) Raf.; Caenotus pusillus (Nutt.) Raf.; Conyza canadensis var. glabrata (A.Gray) Cronquist; Conyzella canadensis (L.) Rupr.; Erigeron canadense var. pusillus (Nutt.) B.Boivin; Erigeron canadensis L.; Erigeron canadensis f. coloratus Fassett\u00a0……; Erigeron…<\/p>\n","protected":false},"author":3,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[5299],"ht-kb-tag":[],"class_list":["post-1353867","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-conyza"],"_links":{"self":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb\/1353867","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb"}],"about":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/types\/ht_kb"}],"author":[{"embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/comments?post=1353867"}],"version-history":[{"count":0,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb\/1353867\/revisions"}],"wp:attachment":[{"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/media?parent=1353867"}],"wp:term":[{"taxonomy":"ht_kb_category","embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb-category?post=1353867"},{"taxonomy":"ht_kb_tag","embeddable":true,"href":"https:\/\/efloraofindia.com\/wp-json\/wp\/v2\/ht-kb-tag?post=1353867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}