Hypericum prolificum |
Hypericum canariense |
|
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shrubby St. John's-wort |
Canary Island st john's wort, Canary Islands St. John's wort |
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Habit | Shrubs, erect or ± diffuse, forming rounded or irregular bush, (2–)7.5–15(–20) dm. | Shrubs erect, bushy, 10–50 dm. |
Stems | internodes 4-lined at first, then 2-lined to terete. |
internodes 4-lined at first, then terete. |
Leaves | blades narrowly oblong to narrowly elliptic-oblanceolate, 30–70 × 6–15 mm, base articulated, attenuate to narrowly cuneate, margins plane to recurved, apex rounded-apiculate to acute, midrib with 10–16 pairs of branches. |
spreading, sessile; blade narrowly elliptic to narrowly elliptic-oblong, 20–70 × 5–15 mm, (proximal usually narrower), base narrowly cuneate to subangustate, margins plane, apex acute to apiculate-obtuse, midrib with 8–12 pairs of branches, tertiary veins densely reticulate toward margins. |
Inflorescences | cylindric, (1–)3–7(–9)-flowered from apical node, with paired single flowers or triads or 1–3(–7)-flowered branches from 2+ proximal nodes. |
broadly rounded-pyramidal to broadly cylindric, to 30-flowered. |
Flowers | 15–30 mm diam.; sepals deciduous, not enclosing capsule, 5, elliptic to obovate or oblanceolate-spatulate, unequal or subequal, 4–8 × 1.5–4 mm; petals 5, golden yellow, obovate to oblanceolate-spatulate, 7–15 mm; stamens deciduous, 150–500; ovary 3(–5)-merous, placentation incompletely axile. |
sepals lanceolate, unequal, 3–4.5 × 1–2.2 mm; petals bright yellow, not red-tinged, oblanceolate-unguiculate, 12–17 mm; anther gland yellow to orange; styles widely spreading, 8–14 mm. |
Capsules | usually narrowly ovoid-conic to ovoid, rarely ellipsoid, 7–13 × 4–7 mm. |
pyramidal-ovoid to ovoid-ellipsoid, 9–12 × 7–8 mm. |
Seeds | carinate, 1.5–2 mm; testa linear-reticulate. |
1.5–2 mm, narrowly winged; testa linear-reticulate to linear-foveolate. |
2n | = 18. |
= 40. |
Hypericum prolificum |
Hypericum canariense |
|
Phenology | Flowering summer (Jun–Sep). | Flowering spring–summer. |
Habitat | Rocky slopes, embankments, dry stream bottoms, woodland (in north), on limestone or granite | Disturbed sites |
Elevation | 50–600+ m (200–2000+ ft) | 20–500 m (100–1600 ft) |
Distribution |
AL; AR; DC; DE; FL; GA; IA; IL; IN; KY; LA; MD; MI; MO; MS; NC; NJ; NY; OH; OK; PA; SC; TN; TX; VA; WI; WV; ON
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CA; Atlantic Islands (Canary Islands, Madeira) [Introduced in North America]
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Discussion | Hypericum prolificum is variable, the most luxuriant form being found in the southwestern part of its range. Natural hybrids have not been recorded; it hybridizes in gardens with H. densiflorum (H. x\arnoldianum Rehder), H. frondosum, H. kalmianum, and H. lobocarpum (H. x\dawsonianum Rehder). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Hypericum canariense is established at Montecito and Santa Barbara in the hills (P. A. Munz 1974) and along the coast north of Santa Cruz to San Francisco, at locations in Orange and San Mateo counties, and in the San Diego coast region. The description above agrees with that for Hypericum floribundum regarding sepals lanceolate and acute; in typical H. canariense they are oblong-spatulate and rounded. The variation is continuous; only one species is recognized here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 76. | FNA vol. 6, p. 96. |
Parent taxa | Hypericaceae > Hypericum > sect. Myriandra | Hypericaceae > Hypericum > sect. Webbia |
Sibling taxa | ||
Synonyms | Brathys prolifica, H. spathulatum, Myriandra ledifolia, M. prolifica, M. prolifica var. spathulata, M. spathulata | H. floribundum, Webbia canariensis, W. floribunda |
Name authority | Linnaeus: Mant. Pl. 1: 106. (1767) | Linnaeus: Sp. Pl. 2: 784. (1753) |
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