Hypericum harperi |
Hypericum apocynifolium |
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Habit | Herbs perennial, semiaquatic or aquatic, erect, branching with long-creeping rhizomes at aerenchymatous base and from mid and distal nodes, 3–10 dm. | Shrubs, erect, branches ascending, 4–7 dm. |
Stems | internodes 4-lined. |
internodes narrowly 4-winged at first, then 2-lined. |
Leaves | ascending to deflexed, sessile; blade narrowly oblong-elliptic (proximal) or lanceolate to linear-lanceolate, 10–30 × 3–8 mm, mostly longer than internodes, not or scarcely smaller distally, leathery, margins plane, apex acute, basal or near-basal veins 1–3(–5), midrib with 0–2 pairs of branches. |
blades oblong to elliptic-oblong, 20–40 × 12–20 mm, base not articulated, broadly cuneate, margins usually plane, rarely recurved, apex rounded to retuse, midrib with 6 pairs of branches. |
Inflorescences | broadly pyramidal to subcorymbiform, 1(–30)-flowered, branching mostly dichasial. |
terminal (1–)3–5(–8)-flowered, narrowly branched. |
Flowers | 4–10 mm diam.; sepals lanceolate, usually unequal, 3–5 × 0.8–1 mm, margins sometimes ciliate, not setulose-ciliate, apex acute to acuminate; petals orange-yellow, obovate, 6–10 mm; stamens 50–80, irregularly grouped; styles 2–4 mm; stigmas capitate. |
15 mm diam.; sepals tardily deciduous, not enclosing capsule, 5, spatulate to elliptic or ovate, unequal, 3–5 × 1.5–2.3 mm; petals 5, coppery yellow, oblong, 8–10 mm length 2 times sepals; stamens deciduous, 60–80; ovary 3-merous, placentation incompletely axile. |
Capsules | ellipsoid to rostrate-subglobose, 3–4.5 × 2–2.5 mm. |
cylindric-conic, 6–15 × 4.5–8 mm. |
Seeds | 0.5–0.6(–0.7) mm; testa obscurely linear-reticulate to irregularly reticulate. |
scarcely carinate, 1.8–2 mm; testa finely scalariform-reticulate. |
2n | = 24. |
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Hypericum harperi |
Hypericum apocynifolium |
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Phenology | Flowering mid–late summer (Jul–Sep). | Flowering summer (Jun). |
Habitat | Open Taxodium swamps, wet pine barrens | Stream banks and moist woods, coastal plain and inland valleys |
Elevation | 0–200 m (0–700 ft) | 10–500 m (0–1600 ft) |
Distribution |
AL; FL; GA; SC |
AR; FL; LA; OK; TX |
Discussion | Hypericum apocynifolium has been included in H. nudiflorum; it can be distinguished from the latter by the fewer, larger flowers with relatively longer, persistent sepals, the larger, thicker-walled capsules, and the seeds, which are ridged and straight rather than carinate and curved. A record from Georgia in the Flint River drainage has not been verified. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 6, p. 90. | FNA vol. 6, p. 82. |
Parent taxa | ||
Sibling taxa | ||
Name authority | R. Keller: Bot. Jahrb. Syst. 58: 198. (1923) | Small: Bull. Torrey Bot. Club 25: 616. (1898) |
Web links |