Jepson eFlora
Key to families | Table of families and genera

Key to Hypericum

View taxon page for Hypericum

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 parietal

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

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

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

3. Perennial herb from taproot, rhizome, or woody caudex

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

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

5. Leaf narrowly oblong; sterile axillary 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 sessile, narrowly lance-oblong; petals 12–17 mm ..... H. canariense

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


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