Acrotrema arnottianum

Acrotrema arnottianum Wight, Ill. Ind. Bot. 1: 9 1840. ;

Common name: Arnott’s Acrotrema

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Herbs; stem very short, densely hispid. Leaves radical, rosetted, to 35 x 15 cm, obovate obtuse, distantly toothed, very hispid, nerves many, regular, parallel; petiole 3-8 cm long, stipules wing-like, adnate to petiole. Flowers 12 mm across, in axillary raceme; pedicel 5 cm long, hispid; sepals 5, 6 x 3 mm, obovate, obtuse, hairy outside; petals 5, 8 x 5 mm, obovate, glabrous, yellow; stamens many, filaments as long as anthers; anthers obovate; carpels 3, jointed along the inner edges; ovules many on parietal placentation; styles 3, recurved. Fruit of 3 follicles, 5 x 5 mm, coherent along the innersides; seeds many, triangular.

(From India Biodiversity Portal

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Acrotrema arnottianum Wight- Dilleniaceae- ESSK-FEB 02 : 5 posts by 5 authors. Attachments(1).

Acrotrema arnottianum Wight is an endemic species of Kerala, belongs to the family Dilleniaceae, one of the three species reported from India.
This is usually seen at low land evergreen forests, particularly along the shady places in southern Kerala. Captured from Thiruvananthapuram district in Kerala

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Nice picture of the interesting plant!

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Is this an acaulescent herb, …?

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Nice find. Is this the herb??

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Requesting a herb ID_290422-4: 2 high res. images.

Neurocalyx calycinus?

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Acrotrema arnottianum Wight

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Requesting a herb id_291022_2: 1 high res. image.
This plant has hirsute leaves that are red when young, green when old. Also, the flowers are yellow with 5 petals. 
Near Agasthymalai environs. IISER TVM.

Pl. check
https://efloraofindia.com/2011/02/01/acrotrema/

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I think it is Acrotrema agastyamalayanum E.S.S.Kumar, Dan & G.M.Nair as per details at A new species of Acrotrema (Dilleniaceae) from India

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Yes

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This is Acrotrema arnottianum

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I have seen this in Tamil Nadu. The species is endemic to Tamil Nadu & Kerala.

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References:

The Plant List Ver.1.1  Tropicos  Flowers of India  India Biodiversity Portal