Cyathula

 

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Cyathula prostrata (L.) Blume

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Cyathula tomentosa (Roth) Moq.

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Keys in Flora of China
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As per efi thread:
Flower clusters in dichasial inflorescences, globose or ellipsoid, 2-4 cm in diam., simple or clustered in spikes (short spikes, if any, as per observations in eFI site) in C.capitata
Flower clusters in dense spikes (long spikes as per observations in eFI site), 1-2 cm in diam. in C.tomentosa
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Keys (as per efi thread):
Leaves sparsely hairy above, membranous, spikes grey-brown, glistening ……. C.capitata
Leaves tomentose above, thick, spikes pale yellow, not glistening ……………….. C.tomentosa
In western Himalaya only these species are found and common.

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Cyathula species in India:

1. Cyathula capitata Moq.
2. Cyathula officinalis K.C.Kuan
3. Cyathula prostrata (L.) Blume (syn. of 
4. Cyathula tomentosa (Roth) Moq.

References:

1. Karthikeyan,
   S., Sanjappa, M. and Moorthy, S. 2009. Flowering Plants of India, Dicotyledons, vol-I (Acanthaceae- Avicenniaceae). Botanical Survey of India, Kolkata. pp.74.
2. eFI page

Pl. go through Cyathula (‎Amaranthaceae) page with images of species (done by me) in efloraofindia.

If you find any mis-identification, pl. let us know. If anybody can send images of other species of this genera (for incorporation in the website), if any, it will be really nice.
Also, if anybody is interested to take up the activity of inserting images on efloraofindia pages from efloraofindia posts, pl. let us know.