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Hypericum chapmanii W.P.Adams
Section: sect. MyriandraSubsection: subsect. Centrosperma
Shrub, usually one-stemmed and tree-like, up to 4 m tall, erect, with branches narrowly ascending. Stems orange-brown, 4-lined and ancipitous when young, soon 4-angled, eventually terete; cortex exfoliating in thin papery sheets or plates, exposing reddish brown to cinnamon bark beneath; bark spongy, thick, appearing fluted when torn apart owing to the presence of large vertically aligned laticifers, furrowing and disintegrating to expose stringy covering of the laticifers. Leaves light green (cf. H. fasciculatum), sessile, (8-)l 1- 16(-25) x 5-7 mm, with those in axils as long, linear-subulate, with margin revolute, overarching all but the raised midrib area beneath and forming 2 longitudinal grooves lined with papillae, chartaceous, deciduous at basal articulation, apex narrowly acute, base parallel or slightly expanded; midrib unbranched; laminar glands dense, in 2 regular rows beneath and scattered above. Inflorescence 1-3-flow- ered, without accessory flowers, often with 1-3 flowers in axil of leaves at 1-2 nodes below, the whole then shortly cylindric; pedicels absent; bracts foliar. Flowers 12-15 mm indiam.; buds ovoid, acute. Sepals 5, 5-7 x 0.5 mm, unequal, linear-subulate, acute, with margin revolute, 1-veined, midrib unbranched. Petals 5, bright? yellow, 7-9 x 3-4.5 mm, c. 1.3-1.4 x sepals, oblong-spathulate, with apiculus lateral, acute. Stamens c. 75, longest 5-5.5 mm (or longer?), c. 0.7 x petals. Ovary 3-merous, c. 3 x 1 mm, very narrowly pyramidal- ovoid, acute, placentation parietal; styles 3, 2.5-4 mm long, c. 0.7-1 x ovary, slightly separating at apex in fruit. Capsule c. 6 x 2.4 mm, narrowly pyramidal-ovoid, 3-sulcate. Seeds dull brown, 0.6-0.8 mm long, ecarinate?; testa finely foveolate-reticulate.