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Nomenclature
Hypericum humboldtianum Steud.
Nomenclature
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Section: sect. BrathysSubsection: subsect. Phellotes
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Synonyms: 5
Media
DIAGNOSTIC DESCRIPTION
Shrub or shrublet (0.05-)0.1-0.75 m tall, erect or decumbent at the base to ascending, with branches pseudo-dichotomous and divergent or lateral and strict, sometimes condensed in leaf axils, not from the base. Stems orange-brown, 4-lined and ancipitous when young, eventually terete, cortex exfoliating in strips; internodes 2.5-14 mm long. Leaves sessile or shortly pseudopetiolate with pseudopetiole up to 0.5 mm long, spreading from above pseudopetiole to subappressed, not tetrastichous, deciduous above base or above pseudopetiole before fading; lamina 6-13 x 1-2.3 mm, narrowly oblong or narrowly elliptic to oblanceolate, plane or incurved, not or slightly cucullate, midrib slightly prominent to impressed beneath, concolorous, sometimes glaucous, coriaceous or subcoriaceous; apex acute to obtuse, not mucronate, base angustate, the pseudopetiole sheathing, free or united with stem-line apex to form narrow interfoliar ridge; basal vein 1, without or with obscure lateral branches, tertiary reticulation absent; laminar glands dense, impressed above. Inflorescence l(3-12)-flowered, the branching dichasial or pseudo- dichotomous or mixed; peduncle and pedicels 3-4(-7) mm long, not incrassate upwards; upper leaves transitional. Flowers c. 15 mm in diam., stellate. Sepals 14.5-16.5 x 1.3-2.2 mm, elliptic-oblong to oblanceolate, acute; veins 3-5, not branched, midrib not prominent; glands linear below and punctiform in upper l/3- l/2 or wholly punctiform. Petals bright yellow, 6-8 x 3.5-5 mm, c. 1.3 x sepals, obovate; apiculus obtuse; glands linear, distally punctiform. Stamens 30-50, longest c.5.5 mm long, 0.6-0.7 x petals. Ovary 1.5-2 x 1 mm, ovoid to cylindric; styles 3, 2-3 mm long, 1-1.5 x ovary, narrowly spreading; stigmas broadly capitate. Capsule 4-6.5 x 2-3 mm, cylindric-ellipsoid, equalling sepals. Seeds0.5-0.6 mm long, ecarinate; testa finely reticulate-scalariform.