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Published In: Prodromus Florae Novae Hollandiae 407. 1810. (Prodr.) Name publication detailView in BotanicusView 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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16. Chenopodium pumilio R. Br. (clammy goosefoot)

Dysphania pumilio (R. Br.) Mosyakin & Clemants

Pl. 353 m, n; Map 1536

Plants annual, with a slight unpleasant odor. Stems 10–40 cm long, prostrate to loosely ascending, few- to much-branched from near the base, with dense, short glandular hairs, usually not reddish-tinged or reddish-striped, often appearing pale green to nearly white. Leaves short- to long-petiolate. Leaf blades 0.5–3.0 cm long, those of well-developed leaves mostly 1.5–3.0 times as long as wide, oblong-elliptic to ovate, mostly bluntly pointed at the tip, rounded or angled at the base, mostly with few rounded lobes, occasionally nearly entire (uppermost leaves), yellowish green and herbaceous in texture, the margins usually also wavy or with shallow, blunt, narrow teeth, the surfaces lacking mealiness, but with dense, sessile, yellowish resin glands. Venation noticeably branched, usually with 1 main vein. Inflorescences axillary, consisting of short spikes or small clusters of flowers. Flowers not all maturing at the same time. Calyx 5-lobed nearly to the base, somewhat spreading at maturity and exposing the fruit at maturity, the lobes 0.5–0.7 mm long, elliptic-ovate to oblong-elliptic, usually sharply pointed at the tip, flat or more commonly rounded to somewhat pouched dorsally, moderately to densely pubescent with dense, sessile, yellowish resin glands, sometimes also with sparse to moderate, short, nonglandular hairs. Stamen usually 1. Stigmas 3. Fruits 0.5–0.7 mm long, ovoid, the seeds positioned vertically, the wall thin, membranous, and somewhat translucent, smooth to finely and faintly wrinkled, difficult to separate from the seed. Seeds reddish brown to dark brown, shiny, smooth, rounded along the rim. 2n=16. August–October.

Introduced, scattered, mostly in the southern third of the state (native of Australia; introduced widely in the U.S., uncommonly in Canada). Banks of streams and rivers, margins of sinkhole ponds; also crop fields, fallow fields, pastures, farmyards, roadsides, railroads, and open, disturbed areas.

 


 

 
 
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