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Hypericum uralum

Description from Flora of China

Hypericum patulum Thunberg var. attenuatum Choisy; H. patulum var. uralum (Buchanan-Hamilton ex D. Don) Koehne; Norysca urala (Buchanan-Hamilton ex D. Don) K. Koch.

Shrubs, 0.3-2 m tall; branches arching, often frondose. Stems 4-lined or 4-angled and strongly ancipitous when young, eventually 2-lined or terete; internodes 0.5-2 cm, shorter than leaves. Leaves with flat petiole 0.5-1 mm; blade lanceolate or when older sometimes ovate, 1-4 × 0.4-2.4 cm, thickly papery, abaxially ± densely glaucous; laminar glands streaks (toward midvein) and dots; abaxial glands usually ± dense; main lateral veins 3-paired, tertiary reticulation scarcely visible; base narrowly or rarely broadly cuneate, apex acute to rounded-apiculate. Inflorescence 1-3(-10)-flowered, from 1 or 2 nodes, nearly flat-topped, with short terminal internode, often with 1-3-flowered branches from middle of stem; bracts deciduous, narrowly oblong. Pedicels 3-7 mm. Flowers 1.5-3 cm in diam., ± deeply cupped; buds broadly ovoid to globose, apex obtuse to rounded. Sepals erect, subequal to unequal, oblong or elliptic to oblong-spatulate, 3.5-6(-9) × (1-)2-5(-6.5) mm; laminar glands lines, margin entire with narrowly hyaline margin, apex rounded or very rarely obtuse. Petals golden to deep yellow, not tinged red, broadly obovate to subcircular, 0.9-1.8 cm × 5-12 mm, 2.5-3 × as long as sepals; margin entire, eglandular; apiculus rounded or obsolete. Stamen fascicles each with 40-60 stamens, longest 4-6(-8) mm, 0.25-0.5 × as long as petals. Ovary broadly ovoid to globose, 3-5 × 2.5-3 mm; styles 2.5-4.5 mm, 0.6-0.9(-1) × as long as ovary, free, erect and divergent toward apex or wholly outcurving. Capsule subglobose or more rarely broadly ovoid, 7-11(-13) × 7-11 mm. Seeds dark brown, 0.4-0.6 mm, scarcely carinate; testa linear-foveolate. Fl. Jul-Sep, fr. Aug-Oct. 2n = 20.

Hypericum uralum is sometimes very similar to H. henryi subsp. uraloides but can usually be distinguished by the frondose stems and broader leaves and sepals.

Dry open habitats, sometimes in thickets and by streams; 1500-3600 m. Xizang (Moindawang, Zayü), NW Yunnan [Bhutan, NE India, N Myanmar, Nepal, Pakistan].


 

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