Keys in Malvaceae of Southern Peninsular India: A Taxonomic Monograph (Hibiscus hirtus L. i.e. “capsules as long or shorter than calyx”. In contrast, the calyx lobes of H. micranthus are strikingly shorter than the fruit)

An undershrub with serrate cordate leaves 2-3 cm, flowers solitary axillary, involucral bracts 6-8, corolla 1 cm, white when blooming in the morning, pink in the noon. Flowering in June. Capsules 6 mm, globose, seeds cottony. Rare on dry rocky hills.   

Name: Hibiscus micranthus L.f.
Tamil name: Sitraamutti
Date: 16 Dec 2008
Location: Nanmangalam RF, Chennai
Altitude: c. 10 metres
This plant is also found in Sathyamangalam RF, TN
Is this plant called as H. ovalifoilus?

Please validate the id of this shrub, naturalized in a small patch in Morni Hills area..
I think this can be Hibiscus hirtus..


Yes 


I think your posted plant seems to be Hibiscus micranthus as per images herein and as per keys in BSI Flora of India

Hibiscus hirtus only as per Keys in Malvaceae of Southern Peninsular India: A Taxonomic Monograph (Flowers white- Hibiscus micranthus, Flowers red- Hibiscus hirtus)


Sorry. I think I got carried away by the colour of the flowers in the keys and did not check the calyx and other aspects. It is Hibiscus micranthus only. 


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This shrub is quite uncommon to find in the wild in Morni Hills…
may have been brought there years back, but could not extend its distribution despite cottony seeds..
Recorded from Morni, please validate or correct the id..
I hope this can be Hibiscus hirtus.. 


Yes, this is Hibiscus hirtus.


For sure it is hibiscus hirtus 
Attachments (1)



 

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Plants for ID: Pl. confirm the id of the plants.
Location Anaikatti, Flowers: June- July, 2011
(2-4 ft. tall shurb).


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efloraindia: 011211 BRS242: 4 images.

Pl. find the attached file contain photo for id. request.
Location: Kalapatti, Coimbatore
Date: 03.12.2011
Habitat: Urban Road side.
Habit: Herb.?


May be Hibiscus species


Yes, it is Hibiscus micranthus.


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Wild Plant For ID : Oman : 290513 : AK-3 : Attachments (2).  4 posts by 2 authors.

Found this small plant on 24/5/13 by the roadside.

Tiny fruits, half green, half white.
Sida?


Sida spinosa


It is Hibiscus micranthus, I think.


Thanks a lot. Your id seems to be absolutely correct. The fruits seems to match a picture on Google search.
Have yet to see an open flower.


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ARJUL54 Malvaceae plant for ID- HIbiscus hirtus? :  4 posts by 3 authors. Attachments (3).  

Found in Bangalore 27th July



yes H.micranthus


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ANJAN05/05 Hibiscus micranthus : 6 posts by 4 authors. Attachments (4)
Family: Malvaceae
Date: 1st January 2014
Place: Manchanabele Dam, Bangalore outskirts, Karnataka

Habit: Shrub


Beautifully photographed!


Nice upload, the flower morphology depicts the plant as Hibicus micranthus


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Hibiscus micranthus L.f. 15Jan SN 21 : 1 post by 1 author. Attachments (1)

Hibiscus micranthus L.f.,

frequent wild undershrub,


 

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identification – reg. : 8 posts by 3 authors. Attachments (1)- 3 MB. 

identify the plant for the attachment.


When and where this plant was collected? 


Collected on Nov 2017, Salem, Tamilnadu India.


Hibiscus micranthus


 

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Submission of Hibiscus hirtus : 10 posts by 2 authors. Attachments (2)- 2 Mb or more. 

I have observed Hibiscus hirtus placed in efi is Hibiscus micranthus (Ref. eflora karnataka; again the description given does not match; It is a rather rare plant; leaves trilobate; hence I am adding description with images captured in wild at Velugonda hills of Eastern ghats
Hibiscus hirtus L., Sp. Pl. 694. 1753. 
Ver.names: Lesser mallow orange (Eng.) Nityamalli నిత్యమల్లె  (Tel.) 
Family: Malvaceae
Description:
Herbs, perennial, up to 2 m tall; stems much branched, appressed-stellate-setulose. Leaves alternate; petiole 0.5-4cm long; lamina ovate-lanceolate, 4-6 × 2-3 cm, shallowly 3 lobed, sparsely to fairly densely stellate-hispid on both surfaces, apex acute, margin serrate, base obtuse. Flowers 1-2cm in diam.,  white; peduncle articulated just below the calyx. Epicalyx lobes 6-7, 5-10 mm long, filiform, stiff. Calyx stellate-setulose; lobes up to 8-9 × 1•5 mm., linear-lanceolate. Corolla 1.5-2cm across, ovate,  white. Staminal column shorter than petals. Ovary globose; style divided above the stamina column, stigmas 5, capitate. Capsule 9 mm in diam., subglobose, minutely pubescent. Seeds reniform, with white silky floss.  
Habitat & location: Rare in hills. 

Thanks, …

I will shortly look into it. 

I think your posted plant seems to be Hibiscus micranthus as per images herein and as per keys in BSI Flora of India

the attached plant is Hibiscus micranthus, (H.micranthus produces white and pink flowers it is Syn of H.ovalifolius (Forsk.) Vahl, 
Leaves simple less than 2cm in diam, in H.micranthus, In H.hirtus leaves partite or lobed(Please observe 2 specimens) epicalyx shorter than calyx, plants hard, stellate hairs short(not as soft as H.Hirtus); in white variety of H.micranthus the corolla is reflexed
in H.hirtus epicalyx simple, seeds cottony, plants bushy, soft hairy (It is not the colour of the flower that determines the species)
It is as per Gamble, Flora A.P By T.Pullaiah, based on these books and after cross check at BSI I have identified


In H.micranthus flowers are solitary usually arise in leaf axils, Epicalyx shorter than calyx lobes

In H.hirtus flowers arise in axils of reduced leaves in racemose manner (upper leaves normally not lobed) fully developed leaves more than 3 cm in diam, epicalyx longer than calyx segments

Yes, this is also micranthus. Calyx and epicalyx are the key characters. Pl. go through all posts in efi site, things will be more clear. 


In your these images, I clearly see filiform epicalyx and calyx divided upto the middle as per keys in BSI Flora, making it micranthus.

Do you still have doubts of this being Hibiscus micranthus on account of filiform epicalyx and calyx divided upto the middle as per keys in BSI Flora of India ?

Yes, I firmly believe it is Hibiscus hirtus only; be cause we have observed the fresh specimen; some leaves are tri lobed; (H.micranthus never bear tri-lobed leaves) epicalyx are longer than calyx; the entire plant is softly pubescent, the leaf size is larger than 3cm, (As per Flora of A.P.by Pullaiah, FPM by Gamble)

Thanks a lot, …
Hope something useful comes out of these discussions.
Due to confusion in Regional Floras & BSI Flora of India, it is sure that there is a long standing confusion between the two.
Finally I think we have to rely on Malvaceae of Southern Peninsular India: A Taxonomic Monograph (I think published after BSI Flora of India).
From perusing this, you will agree with id of Hibiscus micranthus (which also has tri-lobed leaves and plant is pubescent and leaf size larger than 4 cm)  
Based on this, colour of the flower only decides the species among these two, as per the keys. 

I am waiting for your final views in the matter

It is Hibiscs hirtus only as per my opinion, It is up to you only


May I request you pl. confirm this as Hibiscus micranthus or otherwise. 


Can not be sure since the key characters do not appear in close ups in images but leaves are not serrate dentate and flowers are turning to orange on fading. I am hence not familiar to this plant from eastern ghats. It does not look to be H micranthus or H hirtus either.


You can see the calyx on enlarging the first image in some of the flowers.


Yes, one can barely see but epicalyx is seen much longer than calyx while description says almost as long. What about other characters that do not match?
The key between two species is based on leaves.
Leaves long, narrow…hirtus
Leaves broad, short….micranthus
Other characters are overlapping.
Even if my guess is incorrect on this, the confidence level of images is poor.

Thanks, …, May I request you to pl. peruse the Monograph


In a hurry I had taken the images, taking one branch for observation, it is also lost, but it is not H.micranthus,


Thanks … This is going in circles. Can’t go beyond the keys given in flora and can’t challenge the monograph too.


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shrub for Id 040409JM1 : 5 posts by 3 authors. Attachments (3)

On 14/1/09 outside Qutab Shahi Tombs in Hyderabad.


Hibiscus hirtus, lesser mallow 


this the member of Malvaceae family namely Hibiscus ovalifolius


This is Hibiscus ovalifolius. It is shown in Flora of Indian Desert


On going through FOS, p.184, I found Hibiscus hirtus to be a trailing herb, 30-50 cm high, while my pictures were from a shrub of around 1 meter high. Leaves are stated to be oblong, while it’s ovate in my case. Involucral bracts also appear quite small compared to pictures of ,.. at: http://www.flickr.com/photos/dinesh_valke/3070573874/ 

After going through all I also feel it to be Hibiscus ovalifolius. May everybody have a re-look pl.?
Attachments (1)


… may not be H.hirtus. it could well be H. ovalifolius as per … 
For proper understanding and confirmation, it will be interesting to note the colour of the flower fading during the day from pink to white (as put in the above attachment).
Also, the flower shape and size is relatively different from H. hirtus as per illustration at eFlora ( http://www.efloras.org/object_page.aspx?object_id=60081&flora_id=5 )
… shows flower and leaves of H. purpurues (syn. Hibiscus calycinus, Hibiscus ovalifolius, Hibscus calyphyllus, Urena ovalifolia). 
What I have at http://www.flickr.com/search/?w=91314344@N00&q=Hibiscus+hirtus&m=text are H. hirtus; they are erect, and standing normally upto a height of 1 m, to sometimes 1.5 m
I had never paid notice to “trailing herb, 30-50 cm high” described in Ingalhalikar ji’s FOS, but fits very well to what is illustrated in Kehimkar ji’s Common Indian Wild Flowers, pg. 40
About leaves, they are variable, and irregularly toothed.


  

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Malvaceae Week-Bombyx micranthus (L.f.) Riedl.: An undershrub with serrate cordate leaves 2-3 cm, flowers solitary axillary, involucral bracts 6-8, corolla 1 cm, white when blooming in the morning, pink in the noon. Flowering in June. Capsules 6 mm, globose, seeds cottony.

Rare on dry rocky hills.


 

 

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hibiscus hirtus:

hibiscus hirtus, please confirm
at karnala, last week


tell you the truth, i was interestingly observing the grass in the picture, look like Ischemum indicum..
yes white flower, Hibiscus hirtus


Hibiscus micranthus as per Keys in Malvaceae of Southern Peninsular India: A Taxonomic Monograph (Flowers white- Hibiscus micranthus, Flowers red- Hibiscus hirtus)

It is Hibiscus micranthus as per calyx also. 


many thanks for this information


… posted plant is Hibiscus hirtus.
The central structure (style) in case of H. micranthus is different. Thus the two species are easily differentiated.
Attaching a snapshot of H. micranthus from Shrikant ji’s book Flowers of Sahyadri (Aug 2012 edition).


Calyx appears to be cut only up to the middle (micranthus) and not up to the bottom (hirtus), between calyx lobes.


Thanks …
Let us take it as micranthus based on calyx as stated in the monograph.

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Identification of Malvaceae from Kailasgiri, Vizag. : 6 posts by 2 authors. Attachments (1)

Is there only one image? 


 This plant look like Hibiscus micranthus L.f.


From my knowledge which is very much limited to Northern Maharashtra

…i think it is very similar to Hibiscus hirtus


This plant is Hibiscus hirtus, very common in E.ghats


Hibiscus micranthus as per Keys in Malvaceae of Southern Peninsular India: A Taxonomic Monograph (Flowers white- Hibiscus micranthus, Flowers red- Hibiscus hirtus) 


attaching images of Hibiscus lobatus, H.hirtus and H.talboti

3rd image will be of Hibiscus micranthus as per Keys in Malvaceae of Southern Peninsular India: A Taxonomic Monograph (Hibiscus hirtus L. i.e. “capsules as long or shorter than calyx”. In contrast, the calyx lobes of H. micranthus are strikingly shorter than the fruit)

 

 

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attaching images of hibiscus for identification, one of which is H.talboti please let me know other one


If Hibiscus 01 flowers are smaller than 1 cm, it would be H. micranthus

 

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ID request – 020711PC1: Please Identify this Malvaceae member found in JNU campus, New Delhi.

Wild, 1-2 meter heigh shrub, Flowers in June, Flowers open around 7 AM and close by 2-3 PM. Open flowers are white but closed/shrivelled ones purple.


This could be Hibiscus micranthus.  

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Attached are some pics of a shrub captured at Rao Jodha Desert Rock Park, Jodhpur, RJ in March 2018.
Can this be identified, given the lack of features except for a small bud (I think).
Requested to please provide feedback.

Pl. check 
To me appears close. 

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H.micranthus : 2 posts by 2 authors. Attachments (3)- one of 4 Mb. 
H.micranthus from my collection 

location Nalgonda dist, March 2014. 

 

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Hibiscus micranthus, : 3 posts by 2 authors. Attachments (4)
Hibiscus micranthus,
Chinnar WLS, Idukki district in Kerala
This falls in the rain shadow area of the Nilgiris


 

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SD015 Plant ID assistance : 2 posts by 2 authors. Attachments (3)
Need assistance for ID of this plant. Found in Sanjay Van, New Delhi. Elevation 260 m


Hibiscus micranthus


References:


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