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Published In: Proceedings of the American Academy of Arts and Sciences 9: 113. 1874. (Proc. Amer. Acad. Arts) Name publication detailView in Biodiversity Heritage Library
 

Project Name Data (Last Modified On 8/11/2017)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Introduced

 

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8. Atriplex wrightii S. Watson (Wright’s saltbush)

Map 1518

Stems 15–60(–100) cm tall, erect or strongly ascending, the branches ascending. Leaves mostly alternate, the lowermost leaves opposite or nearly so, sessile to short-petiolate. Leaf blades 0.5–7.0 cm long, mostly more than 4 times as long as wide and widest at or above the midpoint, linear to oblanceolate or elliptic, long-tapered or angled at the base, rounded (sometimes with a minute, sharp point) to sharply pointed at the tip, the margins entire or with shallow, irregular, sometimes wavy teeth, appearing green on the upper surface at maturity (often sparsely mealy when young), silvery gray (mealy) on the undersurface. Staminate flowers in short, clusterlike spikes, these axillary among the uppermost leaves and forming narrow, elongate, terminal, spikelike panicles. Pistillate flowers in axillary clusters, all similar, lacking a perianth. Bracts at fruiting fused to far above the midpoint, 2–3 mm long, depressed-ovate to irregularly circular in outline, appearing sessile or narrowed to a short, stalklike base, the margins irregularly toothed, the fused portion becoming hardened and somewhat bony, the surfaces lacking tubercles or crests. Fruits difficult to separate from the bracts. Seeds all similar in size and color, 1.0–1.5 mm long, light brown to brown, more or less shiny, the tip of the radicle (seedling root) positioned above the remaining body of the seed. 2n=18. July–September.

Introduced, uncommon, known thus far only from the city of St. Louis (Arizona to Texas). Railroads.

The inclusion of this species in the Missouri flora is based upon a specimen collected in the St. Louis railyards that Viktor Mühlenbach was unable to determine with confidence in 1956, which finally was identified in 1996 by Hilda Flores Olvera of the National Autonomous University in Mexico City.

 
 


 

 
 
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