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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.


Annual, erect, taprooted. Leaf: base sheathing, 1–9+ mm; blade linear to lance-linear; veins 3. Inflorescence: terminal, head-like; flowers generally few to several; involucre bracts 2–6, 5–12 mm wide, widely ovate, ± red to brown, scarious; pedicels 0–3 mm, hidden by involucre. Flower: sepals 5, fused, glabrous to sparsely, minutely hairy, tube prominent, 8–14 mm, 1–3 mm diam, cylindric, scarious between sepals, veins 15, lobes 0.5–1.8 mm, < tube, rounded; petals 5, 10–14 mm, claw long, limb entire or 2-lobed; styles 2, 9–12 mm. Fruit: capsule, ovoid; stalk 0.2–0.7 mm; valves 4, ascending to recurved. Seed: many, black-brown to black.
33 species: Mediterranean to central Asia. (Greek: rock fissure, from habitat of some species) [Rabeler & Hartman 2005 FNANM 5:162–165]

Key to Petrorhagia

1. Leaf sheath length ± = width, generally 1–2 mm; petals truncate or shallowly notched ..... P. prolifera

1' Leaf sheath length 1.5–3 × width, generally 3–9 mm; petals obcordate to 2-lobed

2. Seeds 1–1.4 mm, conic-papillate; leaf sheath (3)4–9 mm; inner involucre bracts mucronate ..... P. dubia

2' Seeds (1.3)1.5–1.8 mm, tubercled; leaf sheath (2)3–4 mm; inner involucre bracts obtuse to mucronate ..... P. nanteuilii


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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