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HYPERICACEAE ST. JOHN'S WORT FAMILY

Robert E. Preston & Jennifer Talbot

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.
37 genera, 1610 species: worldwide, largely tropics. [Gustaffson et al. 2002 Int J Plant Sci 163:1045–1054] Sometimes included in Clusiaceae. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

HYPERICUM
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.
± 450 species: worldwide. (Greek name) [Robson 2002 Bull Nat Hist Mus London, Bot 32:61–123]

Key to Hypericum

H. mutilum L. subsp. mutilum
NATURALIZED
Annual or perennial herb, 20–60 cm. Stem: ± erect, diffuse-branched from mid-stem or lower. Leaf: leaves below inflorescence 10–25 mm, elliptic to ovate, gland-dotted; leaves above lowest flower branches not or gradually reduced, uppermost leaves linear. Inflorescence: flowers 1–15 per stem. Flower: sepals ± 3 mm, narrowly lanceolate; petals ± 2 mm, yellow; stamens 6–12; styles ± 1 mm. Fruit: ± 4 mm, oblong.
Streambanks, riparian woodland; < 300 m. Sacramento Valley, adjacent n Sierra Nevada Foothills; native to eastern North America. 2 other subspecies of eastern North America. Jul–Oct [Online Interchange]
Unabridged note: Specimens identified as this sp. from above 300 m are misidentified Hypericum anagalloides.

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Next taxon: Hypericum perforatum subsp. perforatum

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Oct 24 2014
Citation for this treatment: [Author of taxon treatment] 2013. Hypericum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=70288, accessed on Oct 24 2014

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Geographic subdivisions indicated for the distribution of Hypericum mutilum subsp. mutilum Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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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.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.