Hypericum acmosepalum

Hypericum acmosepalum is a dwarf shrub in Hypericum sect. Ascyreia that is native to China and known as jian e jin si tao locally. The species was first collected in Yunnan, China, by George Forrest, who brought it back to England to be grown for botanical studying. This specimen became the type specimen under the number F.19448, but was incorrectly referred to as H. patulum var. henryi, and when cultivated as H. kouytchense or H. oblongifolium, both names of species with similar flower structures. The species was first formally described by Norman Robson in the J. Roy. Hort. Soc. 95:490 in 1970. Dr. Robson placed two other species into an unofficial clade with H. acmosepalum because of their very close similarities to one another in both distribution and appearance. The two other species, Hypericum beanii and Hypericum pseudohenryi, and H. acmosepalum therefore form the unofficial clade 'Acmosepalum' within section Ascyreia. This clade seems to be directly related to H. siamense. From N. Robson's original description of the species: Seeds dark orange-brown to reddish-brown, 1-1.1 mm long, narrowly cylindric, narrowly carinate with terminal expansion, shallowly linear-foveolate. Seed dry mass is 0.05mg Its usually oblong or elliptic, apically ± rounded leaves, glaucous abaxially and with a conspicuous intramarginal vein, enable Hypericum acmosepalum to be recognized even when sterile. It can be differentiated from H. kouytchense specifically by the deeper yellow of the petals, the petal apiculus which is not as sharp, and the fact that it grows taller than that species. The species' range includes the Chinese autonomous region of Guangxi and the Chinese provinces of Guizhou, Sichuan and Yunnan. The species is most often found in forest glades, roadside banks, scrubby hillsides, and open stream sides at elevations of 900–2,700 metres (0.56–1.68 mi) above sea level.