Hypericum radfordiorum |
Hypericum suffruticosum |
|
---|---|---|
brushy mountain St. Johnswort |
pineland St. Johnswort |
|
Habit | Herbs perennial, erect or ± spreading, branching at base and beyond, (3–)4–7(–7.8) dm. | Shrubs, erect and branched from near base, forming cushion, or decumbent and matted, 0.5–2 dm. |
Stems | internodes 4-lined. |
internodes 4-lined at first, soon 2-winged. |
Leaves | ascending to widely spreading, sessile; blade narrowly lanceolate (linear-lanceolate on axillary branches), 10–40(–55) × 5–10(–13) mm, longer than internodes, leathery, margins plane, apex acute to acuminate, densely gland-dotted, basal vein 1, midrib with inconspicuous branches. |
blades elliptic or oblong-linear to narrowly obovate or oblanceolate, 3–10 × 1–3 mm, base not articulated, rounded to cuneate, without glandlike auricles, margins plane to subrecurved, apex obtuse, midrib unbranched. |
Inflorescences | cylindric, to 40-flowered; branching mostly dichasial, subsidiary branches usually with relatively smaller leaves. |
1-flowered, often with pseudodichotomous branches from apical node, without proximal branches; pedicels mostly recurved to reflexed in fruit, bracteoles proximal. |
Flowers | 8–15+ mm diam.; sepals lanceolate, unequal (outer slightly wider than inner), 3–6(–7.5) × 1.1–1.8(–2.2) mm, margins sometimes ciliate, not setulose-ciliate, apex acute or acuminate; petals orange-yellow, obovate, 5–10 mm; stamens 50–80, filaments basally connate; styles 2–4 mm; stigmas capitate. |
10–15 mm diam.; sepals persistent, enclosing capsule, (2 or) 4, unequal, outer broadly ovate to broadly elliptic, 4–8 × 4–8 mm, apex obtuse to rounded, inner none or minute; petals 4, pale yellow, narrowly obovate, often unequal, 4–8 mm; stamens persistent, 30; ovary 2-merous. |
Capsules | ovoid, 5 × 3–4 mm. |
cylindric-ellipsoid, 3–5 × 2–3 mm. |
Seeds | 0.4–0.8 mm; testa linear-pitted. |
scarcely carinate, 1 mm; testa finely reticulate. |
2n | = 24. |
= 18. |
Hypericum radfordiorum |
Hypericum suffruticosum |
|
Phenology | Flowering late spring–fall (May–)Jun–Sep(–Oct). | Flowering spring–early summer (Mar–Jun). |
Habitat | Granitic outcrops | Dry, open, sandy pinelands, coastal plain |
Elevation | 500–800 m (1600–2600 ft) | 0–200 m (0–700 ft) |
Distribution |
NC |
AL; FL; GA; LA; MS; NC; SC
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Discussion | Hypericum suffruticosum is near the “cuneifolium” form of H. crux-andreae; it differs, among other things, by the two-merous ovary, the relatively small or absent inner sepals, the pedicels recurved or reflexed in fruit, and the cushion or matted habit. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 6, p. 90. | FNA vol. 6, p. 86. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | Ascyrum pumilum, A. pauciflorum | |
Name authority | Weakley ex J. R. Allison: Castanea 76: 110, fig. 3. (2011) | W. B. Adams & N. Robson: Rhodora 63: 15. (1961) |
Web links |