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Nomenclature
Hypericum attenuatum Fischer ex Choisy
Nomenclature
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Subsection: subsect. HypericumUnranked: ser. Hypericum
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Synonyms: 2
DIAGNOSTIC DESCRIPTION
Perennial herb 0.1-0.45(-0.7) m tall, erect from rootstock or creeping rhizomatous base, with stems numerous to few, caespitose, much branched. Stems 2-lined, with black punctiform and striiform glands on lines and often sparsely (reddish or black) elsewhere; internodes (10-)15-40 mm, usually exceeding leaves. Leaves sessile; lamina (8-)15-31(-38) ´ (3-)5-12(-15) mm, elliptic or elliptic-oblong to oblanceolate or rarely ovate, paler beneath, chartaceous; apex obtuse to rounded, margin entire, plane, base subcordate to cuneate; venation: 2 pairs of main laterals from lower sixth of midrib, tertiary reticulation dense but often rather obscure and apparently lax; laminar glands punctiform, small, pale and black, few or scattered, mainly distal; intramarginal glands black, spaced. Inflorescence many- to few- (rarely 1-) flowered from 1-4 nodes, sometimes with flowering branches from up to 4 nodes below, the whole cylindric to pyramidal; pedicels (1.5-)3-4 mm; bracts and bracteoles 3.5-6.5 mm long, oblong-elliptic, entire. Flowers 13-20(-25) mm in diam., stellate; buds ovoid, subacute to acute. Sepals 5, unequal to subequal, (3.5-)5-10 ´ 1-4 mm, erect in bud and fruit, triangular-ovate to lanceolate, acute to subacuminate, entire; veins 5-7, distally branched; laminar glands pale, striiform to punctiform and black, punctiform, scattered, rather sparse or rarely absent; intramarginal and marginal glands black, punctiform, sparse, distal. Petals 5, golden? yellow, tinged red in bud, 8-12 ´ 4-7 mm, 2.4-3 ´ sepals, oblong-obovate, asymmetric, entire, laminar glands black, punctiform to striiform, scattered, marginal glands black, distally dense. Stamens c. 90, '3'-fascicled, longest 8-10 mm, c. 0.7-0.8 ´ petals; anther gland black. Ovary 3-locular, 2.5-3.5 ´ 2-3 mm, narrowly ovoid; styles 3, free, 4-4.5 mm, 1.3-1.6 ´ ovary, widely spreading; stigmas narrowly capitate. Capsule (4-)6-10 ´ 2-6 mm, 2-3 ´ sepals, broadly ovoid or oblong-ovoid to narrowly conic; valves densely longitudinally vittate, occasionally with a few black longitudinal glandular streaks. Seeds dark? brown, c. 0.7 mm, cylindric, slightly carinate and apiculate, not appendiculate; testa finely linear-foveolate. 2n = 16 (Probatova & Sokolovskaya, 1996).