Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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POLYGONACEAE

BUCKWHEAT FAMILY

James C. Hickman

Annual to trees, some dioecious
Stem: nodes often swollen
Leaves simple, basal or cauline, alternate, opposite, or whorled, generally entire; stipules 0 or obvious and fused into a generally scarious sheath around stem
Inflorescence: small cluster, axillary or arrayed in cymes or panicles; involucres sometimes subtending 1–many flowers
Flower generally bisexual, small, ± radial; perianth generally 5–6-lobed, base ± tapered, often jointed to pedicel; stamens 2–9, often in 2 whorls; ovary superior, styles generally 3, generally fused at base
Fruit: achene, generally enclosed by persistent perianth, generally 3-angled, ovoid, and glabrous
Genera in family: 50 genera, 1100 species: worldwide, especially n temp; some cultivated for food (Fagopyrum ; Rheum , rhubarb; Rumex , sorrel) or ornamental (Antigonon , coral-vine; Muehlenbeckia ; Polygonum )
Reference: [Ronse Decraene & Akeroyd 1988 Bot J Linn Soc 98:321–371; Reveal et al. 1989 Phytologia 66(2–4):83–414]
Treatments of the 15 eriogonoid genera are based on the monographic work of James L. Reveal, who is gratefully acknowledged.

LASTARRIAEA

Annual, hairy
Leaves basal; stipule 0; petiole 0; blade linear
Stem prostrate to ascending
Inflorescence open, brittle; bracts generally 5 per node, awned, awn tips hooked; true involucre 0; flower 1 per node (more at stem tips), sessile
Flower: perianth greenish, thinly hairy, lobes 6, awned, awn tips hooked; stamens 3
Fruit brownish, lanceolate in outline
Species in genus: 3 species: w North America., South America
Etymology: (J.V. Lastarria, Chile, 1817–1888)
Reference: [Reveal 1989 Phytologia 66:199–220]

Native

L. coriacea (Goodman) Hoover

Plant 2–15 cm
Leaf 5–30 mm, ciliate
Inflorescence 5–50 cm diam; bracts generally 5–10 mm, awns 0.5–2.5 mm
Flower: perianth 2–3.5 mm including awns
Fruit 2.5–3 mm
Chromosomes: n=20 (30)
Ecology: Common. Coastal scrub, chaparral, sandy to gravelly soils
Elevation: < 900 m.
Bioregional distribution: Sierra Nevada, Great Central Valley, Central Western California, Southwestern California
Distribution outside California: nw Mexico
Synonyms: L. chilensis Gay subsp. californica Gross; Chorizanthe lastarriaea Parry var. c. (Gross) Goodman; C. coriacea Goodman

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bioregional map for LASTARRIAEA%20coriacea being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Lastarriaea coriacea
Retrieve dichotomous key for Lastarriaea
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