Jafri
Description
Pycnoplinthopsis bhutanica is a high-alpine crucifer endemic to the eastern Himalaya, recorded from Bhutan, Nepal and India, and one of the rarer plants in this group with only about 33 GBIF occurrences. It is confined to open alpine habitats — stony turf, screes, moraines and rock crevices — at very high elevations, generally around and above 4000 m. The plant photographed at Jule-Tso in Bhutan at about 4000 m in June represents its characteristic setting in cold, well-drained alpine ground near glacial lakes, flowering in early summer as the snow retreats.
The species is a small, cushion- or rosette-forming perennial herb with a stout, often woody taproot crowned by a dense tuft of leaves. The leaves are entire to slightly toothed, somewhat fleshy and crowded, frequently appressed to the ground. The flowers are borne close to the rosette on very short pedicels, with four white to pale lilac or pinkish petals arranged in the cruciform pattern typical of the family and six tetradynamous stamens. The fruit is a short silicula characteristic of the genus, retaining a persistent style and dehiscing to release the seeds.
Pycnoplinthopsis is a small Himalayan genus closely allied to Pycnoplinthus, both being dwarf, cushion-forming high-alpine Brassicaceae adapted to the harsh conditions of the upper alpine and subnival zone. The compact rosette habit, woody rootstock and reduced inflorescence are adaptations to cold, wind exposure and a brief growing season. As a narrow eastern Himalayan endemic of restricted, fragile high-elevation habitats, it is of biogeographic and conservation interest and potentially vulnerable to climate-driven contraction of the alpine zone, although it has not been formally assessed.
Author: Jafri · Sources: POWO (Kew), GBIF, Flora of China, Flora of Bhutan, Annotated Checklist of the Flowering Plants of Nepal, Al-Shehbaz systematics of Brassicaceae