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 calycinum L.
NATURALIZED Habit: Evergreen shrub, 20--60 cm, from creeping stolons. Stem: erect, 1 or few-branched. Leaf: petiole 0--2 mm; blade 4.5--10 cm, oblong to narrow-ovate, gland-dotted or -streaked. Inflorescence: flowers 1(3) per stem. Flower: sepals 10--20 mm, unequal, elliptic to obovate, tip hooded; petals 25--40 mm, obovate to oblanceolate, yellow; stamens 90--120 per cluster, anthers red; styles 12--20 mm. Fruit: 10--20 mm, ovoid. Seed: 1.5--2 mm, red-brown, surface finely netted. Ecology: Shaded wildland-urban interface; Elevation: < 1040 m. Bioregional Distribution: NCoRO, c SNH, CCo, SnFrB; Distribution Outside California: native to Turkey. Flowering Time: Jun--Nov Note: Ornamental, occasional escape from cultivation. 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) Previous taxon: Hypericum androsaemum Next taxon: Hypericum canariense
Citation for this treatment: Robert E. Preston & Jennifer Talbot 2012, Hypericum calycinum, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=28739, accessed on January 25, 2025.
Citation for the whole project: Jepson Flora Project (eds.) 2025, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on January 25, 2025.
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(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 occurrence).
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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.
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Duplicates counted once; synonyms included.
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Blue line denotes eFlora flowering time (fruiting time in some monocot genera).
