Hypericum subsessile (Nomenclature)
Shrub c. l m tall. Stems red, 4-angled and ancipitous when young, eventually terete; internodes 10-30 mm long, shorter than leaves; bark grey-brown. Leaves subsessile, with very short flat petiole; lamina 35-65 x 7-20 mm, narrowly elliptic, acute, margin plane, base cuneate, paler to glaucous beneath, subcoriaceous; venation: 3-4 pairs main laterals, branched, the midrib pinnately branched, with tertiary reticulum rather lax, not very conspicuous; laminar glands small dots and short streaks; ventral glands sparse to dense. Inflorescence 1-8-flowered, from 1(2) node(s); pedicel 8-20 mm long; bracts small, lanceolate to foliar, deciduous. Flowers 35-45 mm in diam., shallowly cyathiform; buds ovoid, acute. Sepals 10-18 x 4-10 mm, free, imbricate, unequal (foliaceous), outcurved in bud, reflexed in fruit, ovate to elliptic, acute or acuminate, with margin entire; midrib clearly visible, veins not prominent; laminar glands c. 8, basally linear, punctiform toward apex. Petals bright yellow, tinged red dorsally, slightly incurved, 17-20 x 9-11 mm, c. 2 x sepals, oblanceolate-obovate, with apiculus subterminal, acute; margin entire, eglandular. Stamen fascicles each with 40-60 stamens, longest 12-15 mm, long, c. 0-7 x petals; anthers bright yellow. Ovary 6-8 x 5-6 mm, ovoid-conic; styles 5-6 mm long, 0-8-0-9 x ovary, free, outcurved near apex; stigmas narrowly capitate. Capsule (16-)18-21 x (7-)10-12 mm, narrowly ovoid-conic. Seeds dark reddish-brown, 1.1-1.5 mm long, cylindric, with terminal and unilateral wing, shallowly linear-foveolate.
Thickets; 2400-2550 m.
China (Yunnan, Sichuan).
H. subsessile is directly related to H. siamense and is near the base of the H. hookerianum clade.It is apparently very local in occurrence, having been found in only two widely separated localities. The Yunnan plant has solitary flowers, whereas the one from Sichuan has 1-8-fiowered branches. Otherwise the collections are similar and appear to be conspecific.