Hypericum sphaerocarpum |
Hypericum canariense |
|
---|---|---|
round-fruit St. John's-wort, roundseed St. Johnswort |
Canary Island st john's wort, Canary Islands St. John's wort |
|
Habit | Herbs (perennial) or subshrubs, erect or decumbent, not or rarely rhizomatous, unbranched or branched proximally, 2–6 dm. | Shrubs erect, bushy, 10–50 dm. |
Stems | internodes 2–4-lined. |
internodes 4-lined at first, then terete. |
Leaves | blades narrowly elliptic or narrowly oblong to linear, 30–70 × 3–15 mm, base not articulated, narrowly cuneate to linear, margins plane to revolute, apex subacute to rounded, midrib with 0–4 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 | rounded-corymbiform, 7–70-flowered, narrowly branched, sometimes with dichasia or branches from to 8 proximal nodes. |
broadly rounded-pyramidal to broadly cylindric, to 30-flowered. |
Flowers | 10–15 mm diam.; sepals persistent, not enclosing capsule, 5, broadly ovate to oblong-elliptic, ± unequal, 2.5–5 × 1.5–3 mm; petals 5, bright yellow, oblanceolate-elliptic to elliptic, 5–9 mm; stamens persistent, 45–85; ovary 3-merous, placentation parietal. |
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 | broadly ovoid to depressed-globose, 4.5–8 × 4–7 mm. |
pyramidal-ovoid to ovoid-ellipsoid, 9–12 × 7–8 mm. |
Seeds | carinate, 2–2.7 mm; testa coarsely reticulate. |
1.5–2 mm, narrowly winged; testa linear-reticulate to linear-foveolate. |
2n | = 40. |
|
Hypericum sphaerocarpum |
Hypericum canariense |
|
Phenology | Flowering summer (Jun–Aug). | Flowering spring–summer. |
Habitat | Rocky outcrops or embankments, prairies, stream banks, usually wet or moist, railroad embankments | Disturbed sites |
Elevation | 500–1000 m (1600–3300 ft) | 20–500 m (100–1600 ft) |
Distribution |
AL; AR; IA; IL; IN; KS; KY; MI; MO; MS; NE; OH; OK; TN; TX; WI; ON
|
CA; Atlantic Islands (Canary Islands, Madeira) [Introduced in North America]
|
Discussion | Hypericum sphaerocarpum differs from H. cistifolium and H. nudiflorum in its semiherbaceous habit and more northwestern distribution, as well as in its combination of relatively long, narrow leaves, persistent sepals, globose and apiculate to rounded capsules, and relatively large seeds. The narrow-leaved, bushy form from eastern parts of the range (var. turgidum) merges with the typical form. (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. 83. | FNA vol. 6, p. 96. |
Parent taxa | Hypericaceae > Hypericum > sect. Myriandra | Hypericaceae > Hypericum > sect. Webbia |
Sibling taxa | ||
Synonyms | Brathydium chamaenerium, B. sphaerocarpum, H. chamaenerium, H. sphaerocarpum var. turgidum, H. turgidum | H. floribundum, Webbia canariensis, W. floribunda |
Name authority | Michaux: Fl. Bor.-Amer. 2: 78. (1803) | Linnaeus: Sp. Pl. 2: 784. (1753) |
Web links |