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Nomenclature
Hypericum piriai Arechav.
Nomenclature
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Section: sect. BrathysSubsection: subsect. Phellotes
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Synonyms: 2
DIAGNOSTIC DESCRIPTION
Shrub or perennial herb 0.07-0.35 m or more tall, erect, with taproot, branches few, strict or decumbent, lateral, from base or lower half of stem. Stems green, 4-lined above, eventually terete, gland-dotted, with ± prominent glands along raised fines; cortex eventually exfoliating in strips; internodes 3-21 mm long. Leaves sessile, outcurving and deflexing, not tetrastichous, persistent, not articulated but occasionally breaking off above base; lamina 10-40 x 1-2 mm, linear, revolute, concealing all or most of lower surface apart from midrib, not carinate, paler beneath?, dull above, ± glaucous, subcoriaceous; apex acute to acicular, base parallel, not sheathing, pairs united to form narrow interfoliar ridge; basal vein 1, unbranched; laminar glands dense, slightly impressed or not. Inflorescence l-18(-25)-flowered, terminal and sometimes axillary, monochasial after first branching; pedicels 3-6 mm long; upper leaves bracteose. Flowers 8-20 mm in diam., obconic to pseudotubular. Sepals 6-16 x 1.5-2.5 mm, linear-lanceolate to lanceolate or narrowly oblong, acute to acuminate, margin slightly revolute or plane; veins 3-5, unbranched, midrib slightly prominent or not; glands linear towards base or wholly punctiform. Petals bright (?) yellow, not (?) tinged red in bud, 7-12 x 3-4.5 mm, 0.8-1.2 x sepals, obovate-oblong; glands linear, distally punctiform. Stamens 25-60, longest 5-8(-10) mm, c. 0-75 x petals, 3(5)-fascicled, the double (antesepalous) fascicles sometimes incompletely united, with filaments within each fascicle united shortly or usually to 0.7 of their length. Ovary 1.5-4 x 1-1.5 mm, narrowly ovoid to narrowly ovoid-ellipsoid; styles 3, 2-4 mm long, c. 1-1.3 x ovary, outcurving; stigmas subcapitate. Capsule 5-7 x 2-2.3 mm, ovoid-cylindric to ellipsoid, shorter than sepals. Seeds 0.8-1 mm long, ecarinate; testa finely scalariform.