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APIACEAE (Umbelliferae) CARROT FAMILY

Lincoln Constance & Margriet Wetherwax, except as noted

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

PERIDERIDIA YAMPAH
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.
± 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.

Key to Perideridia

P. gairdneri (Hook. & Arn.) Mathias
NATIVE
Plant 3–14 dm; roots 2–3-clustered or 1, 1.5–8 cm, fusiform. Leaf: basal petiole 8–15 cm; basal blade 20–35 cm, oblong to ovate, generally 1-pinnate, leaflets 2–12 cm, linear or lanceolate, basal occasionally lobed or ternately dissected; cauline leaves 1–2-pinnate or 1–2-ternate. Inflorescence: peduncle 3–20 cm; bracts generally 0; bractlets 8–13, 1–4 mm, lance-linear; rays 1.5–7 cm, unequal, spreading-ascending; pedicels 4–8 mm; 2° umbels 15–40-flowered. Flower: styles 1–2 mm. Fruit: 2.5–3.5 mm, ± round; ribs thread-like; oil tube 1 per rib-interval. Subspecies possibly distinct species. [Online Interchange]

P. gairdneri subsp. gairdneri GAIRDNER'S YAMPAH
NATIVE
Plant generally flexible; root 1, tuberous, 10–15 mm wide. Inflorescence: rays generally 7–14. Flower: petals 1-veined.
2n=38. Coastal flats, grassland, pine forest; < 350 m. s North Coast (Sonoma Co.), Outer North Coast Ranges, Inner North Coast Ranges, Central Coast (scarce s of Monterey Co.), South Coast. Jun–Jul [Online Interchange] {CNPS list}

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Dec 18 2014
Citation for this treatment: [Author of taxon treatment] 2013. Perideridia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=52100, accessed on Dec 18 2014

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click for enlargement Perideridia gairdneri subsp. gairdneri
See CalPhotos for additional images
2001 Doreen L. Smith

Geographic subdivisions indicated for the distribution of Perideridia gairdneri subsp. gairdneri Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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map of distribution 1
(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 occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.