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Nomenclature
Hypericum costaricense N. Robson
Nomenclature
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Section: sect. BrathysSubsection: subsect. Brathys
- isotype: DUKE - Wilbur, Stone - 10634
- holotype: BM - Wilbur, Stone - 10634
- isotype: NY - Wilbur, Stone - 10634
- isotype: US - Wilbur, Stone - 10634
- isotype: DUKE - Wilbur, Stone - 10634
- holotype: BM - Wilbur, Stone - 10634
- isotype: NY - Wilbur, Stone - 10634
- isotype: US - Wilbur, Stone - 10634
DIAGNOSTIC DESCRIPTION
Shrub or shrublet0.2-0.6 m tall , erect or ascending, forming dense rounded clumps, with branches strict, pseudo-dichotomous and lateral. Stems orange-brown, 4-angled and ancipitous when young, eventually terete, cortex exfoliating in strips; internodes 2-4 mm long. Leaves sessile, ± imbricate to suberect, spreading to outcurving and twisting, ± markedly tetrastichous when young, deciduous above base without fading; lamina 5-15 x 0.6-1 mm, linear-elliptic to linear, incurved-canaliculate, not or scarcely cucullate, midrib impressed beneath, margin rather broadly hyaline, concolorous, lucent or often glaucous, subcoriaceous; apex acute to subacute, base parallel-sided, scarcely broadening, pairs forming narrow interfoliar ridge; basal vein 1, unbranched; laminar glands ± dense, clearly visible beneath. Inflorescence 1-flowered, terminal, with pseudo-dichotomous branches from node below; pedicel 3-4 mm long, rather slender, not incrassate upwards; upper leaves not transitional. Flowers 15-20 mm in diam., stellate. Sepals 5-7 x 0.8-1.6 mm, narrowly oblong to narrowly triangular-lanceolate, sharply acute, margin hyaline, veins 5(7), unbranched, midrib or all sometimes prominent; glands linear, distally punctiform. Petals bright yellow to orange-yellow, 6-9(?-13) x 3-4 mm, c. 1.3xsepals, oblong-obovate; apiculus sharply acute; glands linear, distally punctiform. Stamens c. 40-50, longest 5-6 mm long, c. 0.65 -0-75 x petals. Ovary c. 1.5-2 x 1-1.5 mm, ellipsoid; styles 3, 1.2-2 mm long, 0.7-1.5 x ovary, erect; stigmas narrowly to broadly capitate. Capsule 4.5 x 2.5-3 mm, ovoid-ellipsoid, obtuse to rounded, shorter than sepals. Seeds 0.7-1 mm long, ecarinate; testa finely scalariform-reticulate.