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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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

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.

DEDECKERA


Species in genus: 1 sp
Etymology: (Mary C. DeDecker, eastern CA botanist, 1909–2000)
Reference: [Reveal & Howell 1976 Brittonia 28:245–251]

Native

D. eurekensis Reveal & J.T. Howell

JULY GOLD

Shrub, 2–10 dm, 5–20 dm diam, minutely hairy
Leaves cauline; stipule 0; petiole 2–5 mm; blade 7–15 mm, oblanceolate
Inflorescence 1–8 cm; bracts 2–5 per node, free; most nodes with 1 ± sessile flower and 1–several branches; branches and bracts reduced and flowers more per node upward; true involucre 0
Flower: perianth generally 2–4 mm, yellowish, lobes 6; stamens 9
Fruit 2–3.5 mm, light reddish brown, puberulent at tip
Chromosomes: n=14
Ecology: Limestone outcrops
Elevation: 1220–2200 m.
Bioregional distribution: White and Inyo Mountains, Desert Mountains (Last Chance, Panamint mtns).
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for DEDECKERA%20eurekensis being generated
 
N.B. The distribution depicted here differs from that given in The Jepson Manual (1993)

Retrieve Jepson Interchange Index to Plant Names entry for Dedeckera eurekensis
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Overlay Consortium of California Herbaria specimen data by county on this map
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