Hypericum henryi subsp. hancockii
Content
Description
Bushy shrub, 1.-21.8 m (in Sumatra), with arching, sometimes frondose branches;
branchlets 4-lined or 4-angled when young, eventually becoming 2-lined or terete.
Leaves subsessile or up to ½ mm petiolate, 1-4½ by ½-2½ cm, lanceolate to ovate, apex acute to rounded-apiculate, base narrowly or rarely broadly cuneate, very glaucous below;
3 main lateral veins, with scarcely visible lax reticulate venation;
glands all pale, shortly striate towards midrib, otherwise punctate.
Inflorescence l-3(-10)-flowered, terminal (1-2 nodes), corymbose, and often also lateral, racemi-form.
Flowers 1½-3 cm Ø ± concave;
buds broadly ovoid to globose, obtuse to rounded.
Sepals 3½-9 by (1-)2-6½ mm, free, ± imbricate, oblong or elliptic to obovate-spathulate, rounded, entire, midrib invisible or almost so;
spreading or ascending in flower, ascending in fruit;
glands all pale, linear.
Petals bright yellow to golden yellow, 9-18 by 5-12 mm, broadly obovate to obovate-circular, entire, caducous;
apiculus distinct to obscure, ± rounded;
glands all pale, linear.
Stamen fascicles 5, 4-6(-8) mm long, c. ¼-½ as long as petals, each with 40-60 stamens, caducous;
anthers bright yellow to orange-yellow, gland amber.
Ovary 3-5 mm, ovoid to globose;
styles 5, 2½-4½ mm, (0.6-)0.7-0.9 times as long as ovary, partially or wholly outcurving, free;
stigma narrowly capitate;
placentae 5, axile.
Capsule 7-11 mm, subglobose to globose.
Seeds dark brown, c. ½ mm, cylindric-ellipsoid, not curved, slightly carinate, shallowly linear-reticulate.
Distribution
Asia-Tropical: Thailand (Thailand present); Vietnam (Vietnam present), Burma present, Continental SE. Asia present, Mt Kerintji northward to Mt Telong in the Gajo Lands present, S. China present, northern half of Sumatra present
Continental SE. Asia (S. China, Vietnam, Burma, Thailand), in Malesia: northern half of Sumatra (Mt Kerintji northward to Mt Telong in the Gajo Lands).
Notes
The Sumatran form of H. henryi tends to be more luxuriant and to have larger flowers than those elsewhere; but its more erect habit is matched by some Nepal specimens. The form in cultivation in Europe, dwarfer, with arching frondose branches and small flowers, is apparently confined to the Himalaya; but the variation between these extreme forms appears continuous.