Hypericum dolabriforme
straggling St. John's-wort
internodes 4-lined at first, then 2-lined to terete.
blades linear-elliptic or linear-oblong to linear, 20–35 × 3–5 mm (main stem), base not articulated, narrowly cuneate to rounded, margins recurved to revolute, apex obtuse to acute, midrib unbranched.
obconic, (1–)3–20-flowered, ± widely branched, sometimes with single flowers at immediately proximal nodes.
15–20 mm diam.;
sepals persistent, not enclosing capsule, 5, ovate-lanceolate to lanceolate, ± foliaceous, unequal, 5–8(–15) × 2–3(–8)mm;
petals 5, yellow, curved-dolabriform, 10–13 mm;
stamens deciduous, 120–200;
ovary 3-merous.
ovoid-conic, rostrate, 4–9 × 3–4 mm.
carinate, 1.5–1.8 mm;
testa reticulate-scalariform.
= 18.
Hypericum dolabriforme
Hypericum dolabriforme is superficially similar to H. sphaerocarpum, to which W. P. Adams (1962) related it. Apart from the narrow leaves and unequal sepals, it is much nearer morphologically to H. myrtifolium (for example, in the wide-spreading inflorescence, numbers of stamens, and ovoid-conic capsules). Hypericum bissellii, described from a plant growing in Southington, Connecticut, is unlikely to be indigenous in that state.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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