Common Name: ST. JOHN'S WORT FAMILY Habit: Annual to shrub [tree]. Leaf: cauline, simple, opposite or whorled, often gland-dotted; stipules 0. Inflorescence: cyme, panicle, or flower 1, terminal or axillary. Flower: bisexual, radial; sepals persistent, generally 5, often fused at base, overlapping; petals generally 5, free; stamens generally many, free or +- fused into 3--5 clusters; pistil 1, ovary superior, chambers 1--3[5], placentas generally axile, style branches 3. Fruit: capsule, generally septicidal. Seed: many, small. Genera In Family: 37 genera, 1610 species: worldwide, largely tropics. Note: Sometimes included in Clusiaceae. eFlora Treatment Author: Robert E. Preston & Jennifer Talbot Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Habit: Annual to shrub, glabrous. Leaf: sessile Inflorescence: generally terminal cymes, bracted. Flower: sepals [4]5; petals [4]5, deciduous or persistent, generally +- yellow; anthers occasionally black-dotted; ovary chambers 1 or 3(5), placentas 3(5), axile or parietal, projecting into chamber. Etymology: (Greek name) Reference: Robson 2002 Bull Nat Hist Mus London, Bot 32:61--123
Hypericum perforatum L. subsp. perforatum
NATURALIZED Habit: Perennial herb 3--12 dm, taprooted. Stem: erect, many from base; sterile axillary branches generally 2--10 cm. Leaf: 1.5--2.5 cm, narrowly oblong; margins rolled under, black-dotted; lower surface conspicuously clear-dotted. Inflorescence: flowers generally 25--100 per stem. Flower: sepals 4--5 mm, lanceolate, acuminate, black- and clear-dotted; petals 8--12 mm, +- oblong, densely black-gland-dotted, bright yellow, twisting, drying in age; stamens in 3 clusters, anthers black-dotted; styles 4--6 mm. Fruit: 7--8 mm, unlobed. Seed: +- 1 mm, brown. Ecology: Open, disturbed areas in many plant communities; Elevation: 6--1980 m. Bioregional Distribution: NW, CaR, n&c SN, ScV (uncommon s SN, CW, PR, MP); Distribution Outside California: to eastern North America; native to Europe. Toxicity: TOXIC to livestock. Flowering Time: May--Aug Note: 3 other subspecies in Europe, Asia. Unabridged Note: Antibiotic, antidepressant properties. Compound hypericin inhibits HIV. Jepson eFlora Author: Robert E. Preston & Jennifer Talbot Reference: Robson 2002 Bull Nat Hist Mus London, Bot 32:61--123 Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) Noxious Weed listed on the CDFA Weed Pest Ratings table View the CDFA Pest Rating page for Hypericum perforatum subsp. perforatum Weed listed by Cal-IPC Previous taxon: Hypericum mutilum subsp. mutilum Next taxon: Hypericum scouleri
Botanical illustration including Hypericum perforatum subsp. perforatum
Citation for this treatment: Robert E. Preston & Jennifer Talbot 2012, Hypericum perforatum subsp. perforatum, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=91766, accessed on April 16, 2024.
Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 16, 2024.
No expert verified images found for Hypericum perforatum subsp. perforatum.
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