Didymocarpus primulifolius

Didymocarpus primulifolius D.Don, Prodr. Fl. Nepal. 123 1825. (syn: Henckelia primulifolia (D. Don) Spreng.);

Common name: Primrose-Leaved Stone Flower
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As per efi thread:
In D. pedicellatus, stems are absent or very short (up to 1.5 cm) whereas in D. primulifolius stems are 5-20 cm; flowers are larger in D. pedicellatus (corolla  3-4 cm in D. pedicellatus; 1-2.5 cm in D. primulifolius).

Didymocarpus primulifolius D. Don: 12 very high res. images.

What is the difference between Didymocarpus primulifolius and Didymocarpus pedicellatus R.Br. as some images at Didymocarpus pedicellatus R.Br. look similar to your post?

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Thanks for your email. It’s very easy: In D. pedicellatus, stems are absent or very short (up to 1.5 cm) whereas in D. primulifolius stems are 5-20 cm; flowers are larger in D. pedicellatus (corolla  3-4 cm in D. pedicellatus; 1-2.5 cm in D. primulifolius).
I have attached some images for your reference.
Hope this help.

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Didymocarpus primulifolius D. Don: 5 high res. images.

 

 

 

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References:
The Plant List Ver.1.1 IPNI  Asian Flora  Flora of China  FOC illustration  Annotated checklist of Flowering plants of Nepal  Flowers of India  India Biodiversity Portal