Hypericum gentianoides |
Hypericum paucifolium |
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orange-grass, orange-grass St. John's-wort, pineweed, pinweed St. Johnswort |
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Habit | Herbs annual, erect, branches strict, in distal 2/3 or from most nodes, 0.7–6 dm, wiry. | Herbs annual or perennial, erect or decumbent at base, not rooting, branches basal, relatively few or none, 1–7 dm. |
Stems | internodes 4-lined. |
internodes 4-angled. |
Leaves | appressed, sessile; blade narrowly triangular-subulate to linear-subulate, scalelike, 1–4 × 0.4–0.6 mm, subcoriaceous to chartaceous, margins incurved, apex obtuse to rounded, basal vein 1, midrib unbranched. |
erect to spreading, sessile; blade linear-oblong or linear-lanceolate to linear, 5–33 × 0.5–2 mm, leathery, margins plane to revolute, apex acute, basal veins 1(–3), midrib with (0–)1–3 pairs of branches. |
Inflorescences | usually pyramidal, 1–24-flowered, branching mostly monochasial. |
narrowly V-shaped, 1–50-flowered, branching mostly dichasial. |
Flowers | 3–5 mm diam.; sepals lanceolate to narrowly oblong or linear-lanceolate, unequal, 1.5–2.5 × 0.4–0.8 mm, apex acute; petals orange-yellow to golden yellow, oblong, 2–4 mm; stamens 5–11, 5 separate or obscurely 5-grouped; styles 0.8–1.2 mm; stigmas broadly capitate. |
10–15 mm diam.; sepals narrowly oblong to narrowly lanceolate, subequal to unequal, 3–7 × 0.8–1.6 mm, margins sometimes ciliate, not setulose-ciliate, apex acute; petals golden yellow to orange-yellow, red-tinged , oblanceolate to obovate, 6–10 mm; stamens 35–50, irregularly 3-fascicled; styles 2.5–5 mm; stigmas broadly capitate. |
Capsules | narrowly cylindric-conic, 4–5 × 1–1.2 mm, length 2–2.7 times sepals. |
± narrowly ovoid-conic, 4–9 × 2–4 mm. |
Seeds | 0.4–0.8 mm; testa markedly ribbed-scalariform. |
0.5–0.7 mm; testa finely linear-scalariform. |
2n | = 24. |
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Hypericum gentianoides |
Hypericum paucifolium |
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Phenology | Flowering late spring–fall (May–Oct). | Flowering spring. |
Habitat | Dry, sandy soil in open woods, fields, roadsides, waste or rocky places, tall-grass prairie | Dry, grassy habitats, roadsides |
Elevation | 0–500 m (0–1600 ft) | 0–50 m (0–200 ft) |
Distribution |
AL; AR; CT; DC; DE; FL; GA; IA; IL; IN; KY; LA; MA; MD; ME; MI; MO; MS; NC; NH; NJ; NY; OH; OK; PA; RI; SC; TN; TX; VA; VT; WI; WV; NS; ON; PE [Introduced in West Indies (Dominican Republic), South America (Brazil, Paraguay), Europe (France)]
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TX; Mexico |
Discussion | Hypericum gentianoides is smaller in all parts than H. drummondii and more branched. The relatively long, narrow capsule is diagnostic, as are the relatively small, often scalelike leaves. Hypericum sarothra Michaux and Sarothra hypericoides Nuttall are illegitimate names that pertain here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
The relatively long styles distinguish Hypericum paucifolium from all other North American species of sect. Trigynobrathys. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 95. | FNA vol. 6, p. 95. |
Parent taxa | Hypericaceae > Hypericum > sect. Brathys | Hypericaceae > Hypericum > sect. Brathys |
Sibling taxa | ||
Synonyms | Sarothra gentianoides, Brathys gentianoides, H. nudicaule | |
Name authority | (Linnaeus) Britton: Prelim. Cat., 9. (1888) | S. Watson: Proc. Amer. Acad. Arts Sci. 25: 143. (1890) |
Web links |