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Nomenclature
Hypericum arbuscula Standl. & Steyerm.
Nomenclature
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Section: sect. BrathysSubsection: subsect. Spachium
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Synonyms: 1
- holotype: F - J. R. Johnston - 1812
DIAGNOSTIC DESCRIPTION
Subshrub or shrublet 0.25-0.45 m tall, with taproot, bushy to slender, erect or decumbent but not rooting; branches from all along stem or only from below inflorescence, strict. Stems green to reddish-brown, 4-lined, ancipitous and densely gland-dotted at first, eventually terete, cortex exfoliating in strips or irregularly; internodes 2-20 mm long. Leaves sessile, densely imbricate to outcurving or spreading, longer than internodes (sometimes except upper ones), persistent (i.e. deciduous with cortex); lamina 5-20 x 0.6-3.7 mm, lanceolate to linear, margin recurved to strongly revolute, entire, not or scarcely cucullate, midrib prominent and smooth beneath, paler beneath or subconcolorous, sometimes glaucous above, subcoriaceous to coriaceous; apex subacute to acute, base shortly angustate to subamplexicaul, free; basal veins 1-3, unbranched or sometimes with 1 pair of ascending main lateral branches and rarely 1 pair of midrib branches; laminar glands dense, not prominent. Inflorescence 1-c. 40-flowered, branching mixed dichasial/monochasial and pseudo-dichotomous or repeatedly pseudo-dichotomous/sympodial, without or with up to 6 pairs of subsidiary branches; peduncle and pedicels 2-12 mm long, not incrassate upwards; bracts foliar or reduced. Flowers 6-22 mm in diam., stellate (? to infundibuliform). Sepals 4.5-10 x 0.8-3 mm, subequal or unequal, elliptic or linear-oblong or linear-lanceolate to oblanceolate, acute to acuminate; veins (3)5-7, unbranched, becoming prominent; glands linear, distally interrupted or punctiform. Petals bright (?) yellow, not tinged red, 5-10 x 1-4 mm, c. 1.1-1.3 x sepals, oblanceolate to narrowly oblong-spathulate; apiculus acute; glands linear, distally interrupted to punctiform. Stamens c. 40-45, longest 4.5-5 mm long, c. 0.5-0.75 x petals, fascicles not distinct. Ovary c. 1.5-1.8 x 0.8-1 mm, narrowly ovoid-ellipsoid to narrowly ellipsoid, trigonous; styles 3, 3-5.5 mm long, c. 2-3 x ovary, slender, spreading; stigmas narrowly capitate. Capsule 3-5 x 1.5-2 mm, narrowly ovoid to narrowly ellipsoid, trigonous, acute, shorter than sepals. Seeds c. 0.5-0.6 mm long, ecarinate; testa finely scalariform.