Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
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Dieter H. Wilken, except as specified

Annual to tree, sometimes monoecious or dioecious, glandular or with bead-like hairs that collapse with age, becoming scaly or powdery
Stem often fleshy
Leaves generally alternate, entire to lobed; veins generally pinnate
Inflorescence: raceme, spike, catkin-like, or spheric cluster, or flower 1; bracts 0–few
Flower: sepals 1–5, often 0 in pistillate flowers, free or fused, generally persistent in fruit; petals 0; stamens 0–5; ovary generally superior, chamber 1, ovule 1, styles 1–3
Fruit: generally utricle
Seed 1, vertical (fruit compressed side-to-side) or horizontal (fruit compressed top-to-bottom)
Genera in family: 100 genera, 1300 species: worldwide, especially deserts, saline or alkaline soils; some cultivated for food (Beta , beets, chard; Chenopodium , quinoa)
Recent taxonomic note: Recently treated in expanded Amaranthaceae



Species in genus: 1 sp
Etymology: (Robert Allen Rolfe, English botanist, 1855–1921)


A. occidentalis (S. Watson) Kuntze

Shrub 50–200 cm, glabrous
Stem much-branched, jointed; internodes 5–20 mm, green to ± glaucous, fleshy
Leaves sessile, ± decurrent, scale-like, triangular
Inflorescence: spike, 5–25 mm, cylindric, sessile; flowers spirally arranged; bracts peltate
Flower bisexual; calyx 1–1.5 mm, 4–5-lobed, enclosing and falling with fruit; stamens 1–2, exserted; stigmas 2
Fruit ± 1 mm, ovoid
Seed red-brown
Ecology: Saline soils, flats, bluffs
Elevation: < 1300 m.
Bioregional distribution: San Joaquin Valley, e San Francisco Bay Area, Inner South Coast Ranges, n Western Transverse Ranges, e Peninsular Ranges, s East of Sierra Nevada, Desert
Distribution outside California: to Oregon, Idaho, Texas, n Mexico
Flowering time: Jun–Aug
Horticultural information: TRY.

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bioregional map for ALLENROLFEA%20occidentalis being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Allenrolfea occidentalis
Retrieve dichotomous key for Allenrolfea
Overlay Consortium of California Herbaria specimen data by county on this map
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