Flora of North America species comparison

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Atriplex wolfii var. tenuissima
Photo is of parent taxon
Stems

erect, intricately branched, 0.5–3 dm.
Leaves

proximalmost blade linear, 4–20 × 2–3 mm, distalmost blade bracteate, sometimes ovate or ovate-lanceolate, densely grayish scurfy.
Staminate flowers

confined to a few distal axils.
Fruiting

bracteoles ovate or ovate-lanceolate in profile, (1.8–)2.3–2.7 × 1.5–2.1 mm, distal lobe typically larger and broader than lateral lobes, terminal tooth typically much largest or with this apparently displaced laterally.

Atriplex wolfii var. tenuissima
Phenology Flowering summer–fall.
Habitat Plants of saline bottoms, often in margins of marshy areas with salt grass, greasewood, and seepweed
Elevation 1500-2300 m (4900-7500 ft)
Distribution
from FNA
CO; UT; WY
[BONAP county map]
Discussion

Specimens cited by H. M. Hall and F. E. Clements (1923) from central Utah within their concept of Atriplex wolfii in a strict sense have fruiting bracteoles in which the terminal, or apparently terminal, cusp is off-set from the median position, thus appearing to be lateral and lacking a terminal cusp. Other materials cited by them away from the south-central Colorado type locality of var. tenuissima bear bracteoles with a similar displacement of the terminal cusp. Hall and Clements placed such specimens within A. wolfii. Bracts of that type are unmatched among the materials of var. wolfii in southern Colorado. As interpreted here, the plants belong to var. tenuissima.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 4, p. 355.
Parent taxa Chenopodiaceae > Atriplex > subg. Obione > sect. Obione > subsect. Wolfianae > Atriplex wolfii
Sibling taxa
A. wolfii var. wolfii
Synonyms A. tenuissima, A. greenei, A. tenuissima var. greenei, Obione tenuissima
Name authority (A. Nelson) S. L. Welsh: Rhodora 102: 422. (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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