Jepson eFlora: Taxon page
Vascular Plants of California
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Hypericum perforatum subsp. perforatum

Higher Taxonomy
Family: HypericaceaeView Description 
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.
Genus: HypericumView DescriptionDichotomous Key

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.
Species In Genus: +- 450 species: worldwide. Etymology: (Greek name)
Reference: Robson 2002 Bull Nat Hist Mus London, Bot 32:61--123
Hypericum perforatum L. subsp. perforatum
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 by CDFA
Weed listed by Cal-IPC

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Botanical illustration including Hypericum perforatum subsp. perforatum

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, /eflora/eflora_display.php?tid=91766, accessed on February 23, 2020.

Citation for the whole project: Jepson Flora Project (eds.) 2020, Jepson eFlora,, accessed on February 23, 2020.

No expert verified images found for Hypericum perforatum subsp. perforatum.

Geographic subdivisions for Hypericum perforatum subsp. perforatum:
NW, CaR, n&c SN, ScV (uncommon s SN, CW, PR, MP)
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).


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Data provided by the participants of the  Consortium of California Herbaria.
View all CCH records
All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).