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Apiastrum angustifolium

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: ApiastrumView Description 

Species In Genus: 1 sp. Etymology: (Latin: wild celery)

Apiastrum angustifolium Nutt.
Habit: Annual, 5--50 cm, taprooted. Stem: many-branched throughout. Leaf: mostly cauline, generally opposite; petiole 2--4 cm; blade 1--5 cm, round, finely ternately dissected, segments 5--25 mm, linear to oblong. Inflorescence: umbels compound, peduncled or not, from axils or opposite distal leaves; bracts, bractlets 0; rays 2--3, pedicels few, unequal, spreading. Flower: calyx lobes 0; petals wide, white, tip acute, not incurved; ovary tip projection flat to +- conic. Fruit: 1--1.5 mm, elliptic-cordate, compressed side-to-side, papillate-roughened, glabrous in age; ribs thread-like; oil tube 1 per rib-interval; fruit axis divided to base. Seed: face concave. Chromosomes: 2n=22.
Ecology: Chaparral, coastal scrub; Elevation: < 1500 m. Bioregional Distribution: CA-FP; Distribution Outside California: Baja California. Flowering Time: Mar--Apr
eFlora Treatment Author: Lincoln Constance & Margriet Wetherwax
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botanical illustration including Apiastrum angustifolium


Citation for this treatment: Lincoln Constance & Margriet Wetherwax 2016. Apiastrum angustifolium, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 05, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 05, 2016.

Apiastrum angustifolium
click for enlargement
© 2013 Steve Matson
Apiastrum angustifolium
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© 2008 Keir Morse
Apiastrum angustifolium
click for enlargement
© 2003 Keir Morse
Apiastrum angustifolium
click for enlargement
© 2013 Steve Matson
Apiastrum angustifolium
click for enlargement
© 2006 Keir Morse
Apiastrum angustifolium
click for enlargement
© 2013 Steve Matson

More photos of Apiastrum angustifolium in CalPhotos

Geographic subdivisions for Apiastrum angustifolium:
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.