Craib
Description
Primula gracilipes is a spring-flowering primrose of the eastern Himalaya, distributed through Nepal, Sikkim and the rest of India, Bhutan and adjacent China, with additional material in European collections such as Austria and Japan. Its roughly 198 georeferenced records trace a band along the moist eastern Himalayan ranges. It grows on damp, mossy banks, in open subalpine forest, on rock ledges and along stream margins at roughly 2700-4000 m, flowering very early as the snow recedes. The collections cited above, from Tumching-La in Bhutan at 3600 m and from Singalila on the Sikkim-India border at 3200 m, both in April, are typical of its early-season alpine display.
It is a small rosette-forming perennial with leaves that are at first short and enlarge after flowering, the blades obovate to oblong, crenate to dentate and somewhat farinose or efarinose. The flowers appear almost stemless among the developing leaves on slender pedicels (gracilipes meaning "slender-stalked"), arising from a much-shortened scape so that the inflorescence is nearly sessile. Each flower has a tubular calyx and a flat, rose-pink to mauve-purple corolla with a yellow or greenish eye and notched lobes; the species is heterostylous, with pin and thrum flowers. The fruit is a small capsule shorter than or about equalling the calyx.
Primula gracilipes belongs to section Petiolares, a large and taxonomically difficult eastern Himalayan group characterised by early flowering on a short scape and rosettes that expand after anthesis. Heterostyly promotes outcrossing by long-tongued spring insects active at the snowline. It is prized in alpine horticulture but can be challenging in cultivation. While not formally assessed, its early-flowering habit and dependence on cool, humid subalpine sites make it sensitive to changes in snow cover and montane climate.
Author: Craib · Sources: POWO (Kew), GBIF, Flora of Bhutan, Annotated Checklist of the Flowering Plants of Nepal, The Genus Primula (Richards) monograph