Atriplex serenana

A. Nelson ex Abrams

Fl. Los Angeles, 128. 1904

Common names: Stinking orach bracteate orach
Treatment appears in FNA Volume 4. Treatment on page 361. Mentioned on page 329.
Herbs, annual, erect or sprawling, usually branched often forming tangled mats to 10 × (3–)5–20 dm, ascending branches sparsely scurfy. Leaves many, subsessile or very short petiolate; blade subconcolorous, lanceolate to oblong, elliptic, or oval, (8–)10–30(–40) × 3–12(–15) mm, margin sharply dentate to entire. Staminate flowers in glomerules in terminal spikes or panicles 3–20 cm, or reduced to solitary, rounded, terminal glomerule. Pistillate flower in small clusters, axillary. Fruiting bracteoles sessile or subsessile (stipe to 1 mm), cuneate-orbicular to obovate, somewhat compressed, 2.1–3.5 × (1.7–)2–3.7 mm, united 1/2 of length, margin sharply and often slenderly toothed beyond middle, faces often rather strongly veined, smooth or with 1 or more slender or flattened appendages. Seeds brown, 1–1.3(–1.5) mm. 2n = 18.

Distribution

V4 704-distribution-map.gif

sw United States, nw Mexico.

Discussion

Varieties 2 (2 in the flora).

References

None.

Key

1 Staminate inflorescence an elongate panicle or spike bearing numerous, beadlike glomerules; fruiting bracteoles ± 1-veined; mainly of central valley and Owens Valley, to w Nevada, also coastal and insu- lar, s California Atriplex serenana var. serenana
1 Staminate inflorescence of solitary, terminal, subglobose glomerule; fruiting bracteoles 3-veined; coastal s California Atriplex serenana var. davidsonii