Hypericum cistifolium |
Hypericum concinnum |
|
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roundpod St. Johnswort |
gold-wire |
|
Habit | Shrubs, erect, unbranched or with relatively short branches and sometimes 1–2 branches ascending from proximal nodes, 5–13 dm. | Herbs erect or ascending, rarely with rooting base, bushy, 1.5–3.3 dm. |
Stems | internodes 4-lined at first, then terete. |
internodes (at least some) 4-lined, without black glands. |
Leaves | blades narrowly oblong or narrowly elliptic-oblong to triangular-lanceolate, 15–40 × 2–10 mm, base not articulated, cuneate to subcordate, margins recurved, apex subacute to rounded, midrib with 1 pair of branches. |
spreading, sessile or petiolate (to 0.5 mm); blade narrowly elliptic or narrowly oblong to linear, usually conduplicate, sometimes falcate, 13–22 × 1.5–8 mm, base cuneate, margins plane, apex acute to subacute, midrib with 2–4 pairs of branches, black glands marginal. |
Inflorescences | corymbiform to cylindric, (7–)15–65-flowered, narrowly branched, sometimes with 3–65-flowered dichasia from 1–2 proximal nodes and relatively short, flowering branches from further 1–4 nodes. |
subcapitate to cylindric, 1–7-flowered. |
Flowers | 7–12 mm diam.; sepals persistent, not enclosing capsule, 5, obovate or broadly elliptic to oblong, unequal, 2–4 × 1–1.7 mm; petals 5, bright yellow, oblanceolate, 5–8 mm; stamens (some or all) persistent, 30–50; ovary 3-merous, placentation parietal. |
20–35 mm diam.; sepals markedly imbricate, spreading in fruit, broadly to narrowly ovate, unequal, 6–9 × 2–3 mm, apex acute to acuminate; petals yellow, obovate or oblong-obovate, (10–)12–15 mm; stamens 40–80(–100); anther gland amber; styles 6–9 mm. |
Capsules | ovoid-cylindric to broadly ovoid, 4–6 × 3–4 mm. |
ovoid, 6–9 × 4–4.5 mm, with longitudinal vittae. |
Seeds | not carinate, 0.6 mm; testa reticulate to linear-foveolate. |
not carinate, 1 mm; testa minutely and shallowly pitted. |
2n | = 18. |
= 16. |
Hypericum cistifolium |
Hypericum concinnum |
|
Phenology | Flowering spring–early fall (Apr–Oct). | Flowering summer (May–Jul). |
Habitat | Pine flatwoods, margins of bogs, swamps, and marshes, ditches, on sand, coastal plain | Dry slopes, chaparral, yellow pine forest |
Elevation | 0–300 m (0–1000 ft) | 100–600(–900) m (300–2000(–3000) ft) |
Distribution |
AL; FL; GA; LA; MS; NC; SC; TX
|
CA
|
Discussion | Hypericum cistifolium is woodier in habit than H. sphaerocarpum and has shorter leaves, smaller flowers, narrower sepals, narrower capsules, and smaller seeds. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Hypericum concinnum is known from the Sierra Nevada from Mariposa County to Shasta County and the North Coast Ranges from Marin County to Mendocino County. It is isolated, taxonomically and geographically, from its nearest relative, which seems to be the northeastern Asian H. ascyron subsp. gebleri (Ledebour) N. Robson. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 82. | FNA vol. 6, p. 98. |
Parent taxa | Hypericaceae > Hypericum > sect. Myriandra | Hypericaceae > Hypericum > sect. Hypericum |
Sibling taxa | ||
Synonyms | H. opacum, H. punctulosum, H. rosmarinifolium | H. seleri |
Name authority | Lamarck: in J. Lamarck et al., Encycl. 4: 158. (1797) | Bentham: Pl. Hartw., 300. (1849) |
Web links |