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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 e North America. 2 other subspp. of e North America. Jul–Oct [Online Interchange]
Unabridged note: Specimens identified as this sp. from above 300 m are misidentified Hypericum anagalloides.

Previous taxon: Hypericum hookerianum
Next taxon: Hypericum perforatum subsp. perforatum

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].

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Bioregions in which taxon occursRed area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon;
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 have georeferencing or identification issues.
map of distribution 1

Chart based on elevation range in Manual and elevations and coordinates of CCH records.
Data provided by the participants of the Consortium of California Herbaria.
Note: About half of the CCH records include both elevation and coordinates.
Map made in collaboration with Scott Loarie. Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

 

CCH collections by month

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