Flora of North America species comparison

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Atriplex parishii var. subtilis
Photo is of parent taxon

subtle orach
Stems

erect, much branched, 1–3 dm, densely scurfy;

branches opposite, often purple-reddish, neither ribbed nor striate;

internodes 5–15 mm.
Leaves

mostly opposite, sessile;

blade ovate-triangular to broadly ovate, 2–4 × 1–3 mm, mostly cordate-clasping, densely scurfy on both sides.
Flowers

of both sexes intermixed in axillary glomerules, but sometimes staminate clustered toward apex.
Seeds

dark brown.
Fruiting

bracteoles persistent, deltoid, 2.4–2.8 mm and wide, margin with 1–3 pairs of irregular teeth, proximalmost usually larger and retrorse, apex shortly acuminate, with 2 longitudinal rows of tubercles on 1 or both surfaces.

Atriplex parishii var. subtilis
Phenology Flowering late spring–fall.
Habitat Saline depressions, often within or later growing in depressions of vernal pools
Elevation 40-100 m (100-300 ft)
Distribution
from FNA
CA
Discussion

Of conservation concern.

Atriplex depressa var. subtilis occurs with Allenrolfea occidentalis, Distichlis spicata, Centromadia pungens, Suaeda Moquin-Tandonii, Spergularia macrotheca, Frankenia salina, and Sporobolus airoides and other Atriplex spp. Stutz and Chu compared this variety with Atriplex depressa, with whose more northern range in the Central Valley it is contiguous. The leaves are relatively small and the stems are thin. Plants of var. subtilis appear very much like an elongated, gracile form of var. parishii.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 4, p. 357.
Parent taxa Chenopodiaceae > Atriplex > subg. Obione > sect. Obione > subsect. Pusillae > Atriplex parishii
Sibling taxa
A. parishii var. depressa, A. parishii var. minuscula, A. parishii var. parishii, A. parishii var. persistens
Synonyms A. subtilis
Name authority (Stutz & G. L. Chu) S. L. Welsh: Rhodora 102: 423. (2001)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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