Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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HYPERICACEAE

ST. JOHN'S WORT FAMILY

Jennifer Talbot

Annual, perennial herb, shrub, tree
Leaves simple, cauline, opposite or whorled; stipules 0; blade often with black dots or embedded clear glands
Inflorescence: cyme, panicle, or flower solitary, 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, placentas generally axile, style branches 3
Fruit: capsule, generally septicidal
Seeds many, small
Genera in family: 10 genera, 400 species: worldwide.

HYPERICUM

Annual, perennial herb, shrub, glabrous
Leaf sessile, ± gland-dotted
Inflorescence: generally cyme, generally terminal, bracted
Flower: sepals 5; petals 5, deciduous or persistent, yellow; anthers sometimes black-dotted; ovary chambers 1 or 3, placentas 3, axile or parietal and projecting into chamber
Species in genus: 350 species: worldwide
Etymology: (Greek name)

Native

H. formosum Kunth var. scouleri (Hook.) J.M. Coult.

Perennial from taproot or rhizome
Stems erect, few from base, 2–7 dm, slender; sterile axillary branches generally < 2 cm
Leaf 1–3 cm, ovate to oblong; flat; base ± clasping; margin black-dotted, lower surface inconspicuously dotted
Inflorescence: flowers generally 3–25 per stem
Flower: sepals 3–4 mm, oblong to ovate, generally obtuse, black-dotted, margin glabrous; petals 7–12 mm, obovate, pale to bright yellow, black-dotted; stamens many, in 3 clusters, anthers black-dotted; styles 3–5 mm
Fruit 6–7 mm, 3-lobed
Seed < 1 mm, brown
Ecology: Springs, meadows, moist places
Elevation: 100–2500 m.
Bioregional distribution: Northwestern California, High Cascade Range, Sierra Nevada, Sacramento Valley, San Francisco Bay Area, Inner South Coast Ranges, Transverse Ranges, Peninsular Ranges, Great Basin Floristic Province
Distribution outside California: to w Canada, Colorado
Flowering time: Jun–Aug

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bioregional map for HYPERICUM%20formosum%20var.%20scouleri being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Hypericum formosum var. scouleri
Retrieve dichotomous key for Hypericum
Overlay Consortium of California Herbaria specimen data by county on this map
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