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Nomenclature
Hypericum marahuacanum N. Robson
Nomenclature
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Section: sect. BrathysSubsection: subsect. Brathys
- holotype: VEN - Maguire - 65629
- isotype: MO - Maguire - 65629
- isotype: NY - Maguire - 65629
DIAGNOSTIC DESCRIPTION
Shrub 0.3-1.5 m tall, erect, with branches strict to very strict, mostly pseudo-dichotomous to all lateral. Stems orange-brown, 4- angled and ancipitous when young, the subfoliar ridges broad, soon terete, cortex exfoliating irregularly; internodes 0.7-2 mm long. Leaves sessile, densely imbricate, erect to suberect, outcurving, twisting slightly or not, subtetrastichous to strictly tetrastichous, deciduous above base without fading; lamina 5-12 x 0.6-1 mm, linear, incurved, not cucullate, midrib impressed beneath, margin narrowly hyaline, concolorous, polished, not glaucous, coriaceous; apex acute, often slightly pungent, base parallel-sided, not sheathing, pairs united to form narrow interfoliar ridge; basal vein 1, without reticulation; laminar glands in single irregular row, visible beneath or not. Inflorescence 1-flowered, sometimes with pseudo-dichotomous branches from node below; pedicel 2-3 mm long, not incrassate upwards; upper leaves not transitional. Flowers 10-15(-20?) mm in diam., stellate. Sepals 4-9 x 0.6 mm, narrowly lanceolate or narrowly oblong-lanceolate, acute, veins (3)5-9, unbranched, midrib impressed; glands linear, becoming prominent (sepals ribbed). Petals deep yellow to orange- yellow, 6-11 x 2.5-4 mm, c. 1.2-1.7 x sepals, obovate (?) to oblanceolate; apiculus sharply acute; glands linear, usually distally interrupted. Stamens 30-50, longest 3-9 mm long, 0.45-0.8 x petals. Ovary 1.2-3 x 1-1.5 mm, narrowly ellipsoid or narrowly ovoid-ellipsoid to ellipsoid-subglobose, acute to rostrate; styles 3(4), 2-2.5 mm long, 1.5-2 x ovary, outcurved to erect or ascending; stigmas narrow to narrowly capitate. Capsule 3.5-5 x 2-2-5 mm, narrowly ovoid to ovoid-ellipsoid, shorter than sepals. Seeds 1-1.2 mm long, ecarinate; testa finely scalariform.