Hypericum radfordiorum |
Hypericum denticulatum |
|
---|---|---|
brushy mountain St. Johnswort |
coppery St. John's wort |
|
Habit | Herbs perennial, erect or ± spreading, branching at base and beyond, (3–)4–7(–7.8) dm. | Herbs perennial, erect, branching at usually aerenchymatous base and in inflorescence, 2–7 dm. |
Stems | internodes 4-lined. |
internodes 4-lined. |
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. |
(main stem) spreading to appressed, sessile; blade usually broadly to narrowly ovate, rarely elliptic or lanceolate, 4–20 × 5–15(–18) mm, mostly shorter than internodes, leathery, margins plane, apex acute to subrounded, densely gland-dotted, basal veins 1–5, if 1, midrib with 2–3 pairs of branches. |
Inflorescences | cylindric, to 40-flowered; branching mostly dichasial, subsidiary branches usually with relatively smaller leaves. |
broadly pyramidal to corymbiform, to 25-flowered, branching mostly dichasial. |
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. |
5–13 mm diam.; sepals ovate or lanceolate to elliptic or obovate, subequal, 3–8 × 1.5–4 mm, margins sometimes ciliate, not setulose-ciliate, apex acute; petals orange-yellow, obovate, 5–10 mm; stamens 50–80, irregularly grouped; styles 2–4 mm; stigmas clavate. |
Capsules | ovoid, 5 × 3–4 mm. |
ovoid to rostrate-subglobose, 3–5 × 2–3 mm. |
Seeds | 0.4–0.8 mm; testa linear-pitted. |
0.4–0.7 mm; testa obscurely linear-reticulate to finely ribbed-scalariform. |
2n | = 24. |
|
Hypericum radfordiorum |
Hypericum denticulatum |
|
Phenology | Flowering late spring–fall (May–)Jun–Sep(–Oct). | Flowering summer–early fall (Jun–Sep). |
Habitat | Granitic outcrops | Wet woods, marshes, bogs |
Elevation | 500–800 m (1600–2600 ft) | 0–400 m (0–1300 ft) |
Distribution |
NC |
AL; DE; GA; NC; NJ; NY; PA; SC; TN; VA
|
Discussion | D. H. Webb (1980) regarded the disjunct populations in North Carolina and Tennessee as possible relicts and the Alabama one as due to recent introduction. J. R. Allison (2011) agreed and, in his opinion, the Pennsylvania and Virginia records are historical, and Hypericum denticulatum is likely adventive in Georgia. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 6, p. 90. | FNA vol. 6, p. 89. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | H. angulosum, H. denticulatum var. ovalifolium, H. laevigatum, H. virgatum var. ovalifolium | |
Name authority | Weakley ex J. R. Allison: Castanea 76: 110, fig. 3. (2011) | Walter: Fl. Carol., 190. (1788) |
Web links |