Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Hypericum

View taxon page for Hypericum

(For a list of species in Hypericum, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Petals < 5 mm; styles 1–1.5 mm; fruit chamber 1, placenta 

2. Plant  to , 3–30 cm; flower branches near stem tips; leaves below inflorescence  to ± round, 4–15 mm, abruptly reduced above lowest flower branches ..... H. anagalloides

2' Plant ± , 20–60 cm; flower branches from mid-stem or lower; leaves below inflorescence elliptic to , 10–25 mm, slightly reduced above lowest flower branches ..... H. mutilum subsp. mutilum

1' Petals > 5 mm; styles 2–20 mm; fruit chambers 3,  

3. Perennial herb from taproot, or woody 

4. Leaf  to , generally folded, tip ; stem from woody caudex ..... H. concinnum

4' Leaf ± elliptic to ovate or , not folded, tip ; stem from taproot or rhizome

5. Leaf narrowly oblong; sterile  branches generally 2–10 cm; fruit unlobed ..... H. perforatum subsp. perforatum

5' Leaf ovate to elliptic; sterile axillary branches generally < 2 cm; fruit 3-lobed ..... H. scouleri

3' Shrub or subshrub

6. Petals <= 10 mm, <= sepals ..... [H. androsaemum]

6' Petals > 10 mm, 2–4 × sepals

7. Stem 1 or few-branched; flowers generally 1(3) per stem ..... H. calycinum

7' Stem many-branched; flowers generally > 1 per branch

8. Leaves , narrowly lance-oblong; petals 12–17 mm ..... H. canariense

8' Leaves petioled,  1–4 mm; leaves ovate to broadly lanceolate; petals 15–30 mm ..... [H. hookerianum]


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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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