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Lomatium triternatum var. triternatum

Higher Taxonomy
Family: Apiaceae (Umbelliferae)View DescriptionDichotomous Key

Habit: 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.
Genera In Family: 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). Note: Mature fruit generally critical in identification, shape given in outline. Hydrocotyle moved to Araliaceae. Petroselinum crispum (Mill.) A.W. Hill is a waif.
eFlora Treatment Author: Lincoln Constance & Margriet Wetherwax, except as noted
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: LomatiumView DescriptionDichotomous Key

Habit: Perennial herb, from taproot or generally deep-seated tuber, glabrous to tomentose. Stem: 0 or erect, simple or branched; base fibrous or not. Leaf: blade oblong to triangular-ovate or obovate, ternately, pinnately, or ternate-pinnately dissected or compound, segments or leaflets thread-like to wide; old basal leaf sheaths fibrous-persistent or not. Inflorescence: umbels compound, peduncled; bracts generally 0; bractlets generally present, 0 to conspicuous; rays, pedicels spreading to erect, generally webbed at base. Flower: calyx lobes generally 0; petals wide, yellow, white, or purple, tips narrowed; ovary tip projection 0. Fruit: linear to obovate, compressed front-to-back; marginal ribs widely to narrowly thin or thick-winged, others thread-like; oil tubes 1--several per rib-interval; fruit axis divided to base. Seed: face flat to concave.
Species In Genus: +- 75 species: central and southern North America. Etymology: (Greek: bordered, from prominent marginal fruit wing) Note: Fruit wing width given as width of 1 wing, not both together. Lomatium roseanum Cronquist is reported from CaRH, northern SNH, MP.
Species: Lomatium triternatumView Description 

Habit: Plant 1.5--10 dm, generally finely soft-hairy or puberulent; taproot slender to massive. Stem: prominent. Leaf: petiole 7--20 cm, sheathing +- to middle; blade 7--20 cm, oblong-ovate to triangular-ovate or obovate, 1--2-ternate-pinnate, leaflets 1.5--20 cm, linear to lance-ovate, generally entire; cauline leaves 0 or generally sheathing throughout. Inflorescence: peduncle generally 1--4.5 dm, spreading to erect; bractlets (0)3--8, 1--5 mm, thread-like to lance-linear, +- scarious; rays 5--20, 2--10 cm, spreading or spreading-ascending, unequal; pedicels 1--10 mm. Flower: corolla yellow; ovary glabrous to densely puberulent. Fruit: 6--22 mm, oblong, puberulent or glabrous; wings generally < body in width.
Note: Lomatium triternatum var. anomalum (J.M. Coult. & Rose) Mathias evidently not in California. Varieties poorly defined. Variable in GB, adjacent areas.

Lomatium triternatum (Pursh) J.M. Coult. & Rose var. triternatum
Flower: ovary glabrous. Chromosomes: 2n=22,44.
Ecology: Open serpentine ridges, scrub, pine forest; Elevation: 200--2000 m. Bioregional Distribution: KR, NCoR, Wrn; Distribution Outside California: to Washington, western Canada, Montana, western Nevada. Flowering Time: Apr--Jul
Synonyms: Lomatium nudicaule (Pursh) J.M. Coult. & Rose var. puberulum Jeps.
eFlora Treatment Author: Lincoln Constance & Margriet Wetherwax
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Citation for this treatment: Lincoln Constance & Margriet Wetherwax 2016. Lomatium triternatum var. triternatum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 30, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on April 30, 2016.

Lomatium triternatum var. triternatum
click for enlargement
© 2008 Keir Morse
Lomatium triternatum var. triternatum
click for enlargement
© 2008 Keir Morse
Lomatium triternatum var. triternatum
click for enlargement
© 2008 Keir Morse
Lomatium triternatum var. triternatum
click for enlargement
© 2008 Keir Morse

More photos of Lomatium triternatum var. triternatum in CalPhotos

Geographic subdivisions for Lomatium triternatum var. triternatum:
KR, NCoR, Wrn;
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.
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.