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Annual to perennial herb [shrub, tree], generally from taproot. Stem: generally ± scapose, generally ribbed, hollow. Leaf: basal and generally cauline, generally alternate; stipules generally 0; petiole base generally sheathing stem; blade generally much dissected, occasionally compound. Inflorescence: umbel or head, simple or compound, generally peduncled; bracts present in involucres or 0; bractlets generally present in "involucels". Flower: many, small, generally bisexual (or some staminate), generally radial (or outer bilateral); calyx 0 or lobes 5, small; petals 5, free, generally ovate or spoon-shaped, generally incurved at tips, generally ± ephemeral; stamens 5; pistil 1, ovary inferior, 2-chambered, generally with a ± conic, persistent projection or platform at tip subtending 2 free styles. Fruit: 2 dry, 1-seeded halves (= mericarps), separating from each other but generally ± persistent to central axis; ribs on halves 5, 2 marginal, 3 to back; oil tubes 1–several per interval between ribs.
300 genera, 3000 species: ± worldwide, especially temperate; many cultivated for food or spice (e.g., Carum, caraway; Daucus; Petroselinum); Bupleurum lancifolium Hornem. is historical garden weed; some toxic (e.g., Conium). Mature fruit generally critical in identification, shape given in outline. Hydrocotyle moved to Araliaceae. Petroselinum crispum (Mill.) A.W. Hill is a waif. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.
Key to Apiaceae
Perennial herb, glabrous, generally glaucous; roots tuberous, single or clustered, or clustered-fibrous. Stem: erect, branched. Leaf: blade lanceolate to triangular-ovate, generally 1–2-ternate-pinnate or 1–2-pinnately or ternate-pinnately dissected, leaflets or segments generally linear to lance-linear. Inflorescence: umbels compound; bracts 0–many, conspicuous and reflexed or not; bractlets several to many, narrow, ± scarious; rays, pedicels few to many, generally spreading-ascending; 2° umbels generally convex distally. Flower: calyx lobes evident; petals generally obovate, white, tips narrowed. Fruit: linear-oblong, ± compressed side-to-side or not at all, glabrous; ribs ± equal, thread-like to prominent, not winged; oil tubes 1–several per rib-interval; fruit axis divided to base. Seed: face flat to grooved.Key to Perideridia
± 12 species: generally western America. (Greek: around the neck, from involucre) [Chuang & Constance 1969 Univ Calif Publ Bot 55:1–74] Roots, basal leaves needed for identification.
Plant 1.5–9 dm; roots tuberous, 2–3-clustered or 1, 1–7 cm. Leaf: basal petiole 2–15 cm; basal blade 10–20 cm, ± ovate, generally 1–2-ternate-pinnately dissected, segments 0.5–6 cm, thread-like to oblong, generally lobed, toothed; cauline leaves ternate-pinnately dissected or 1-ternate. Inflorescence: peduncle 2–20 cm; bracts 8–12, 3–12 mm, ± lanceolate, generally acuminate; bractlets 4–10, 3–9 mm, like bracts; rays 9–23, 1–2 cm, ± equal, ascending or spreading-ascending; pedicels 2–5 mm; 2° umbels 18–30-flowered. Flower: petals 1-veined; styles 2 mm. Fruit: 4–6 mm, ± oblong; ribs thread-like; oil tubes 2–3 per rib-interval. Subspecies distinct. [Online Interchange]
Plant 1.5–8 dm, green. Leaf: segments 1–4 mm wide, oblong to thread-like, terminal 3–8 cm, lateral 0.5–3 cm. Inflorescence: bracts, bractlets lanceolate, deciduous, scarious throughout, margins uneven; 2° umbels 25–30-flowered.
2n=38. Meadows, scrub, pine forest; 850–2750 m. Klamath Ranges, High Cascade Range, High Sierra Nevada, Modoc Plateau, n East of Sierra Nevada; to Oregon, Idaho, Wyoming, Nevada. Jun–Aug [Online Interchange]
Previous taxon: Perideridia bolanderi
Next taxon: Perideridia bolanderi subsp. involucrata
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 24 2014
Citation for this treatment: [Author of taxon treatment] 2012. Perideridia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=52097, accessed on Apr 24 2014
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|Perideridia bolanderi subsp. bolanderi|
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© 2002 James B. Gratiot
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