Difference between revisions of "Amaranthus australis"

(A. Gray) J. D. Sauer

Madroño 13: 15. 1955.

Common names: Southern water-hemp southern amaranth
Basionym: Acnida australis A. Gray
Synonyms: Acnida alabamensis Standley Acnida cannabina var. australis (A. Gray) Uline & W. L. Bray Acnida cuspidata Bertero ex Sprengel
Treatment appears in FNA Volume 4. Treatment on page 416. Mentioned on page 412, 413.
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|name=Acnida alabamensis
 
|name=Acnida alabamensis
 
|authority=Standley
 
|authority=Standley
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}} {{Treatment/ID/Synonym
 
|name=Acnida cannabina var. australis
 
|name=Acnida cannabina var. australis
 
|authority=(A. Gray) Uline & W. L. Bray
 
|authority=(A. Gray) Uline & W. L. Bray
}}{{Treatment/ID/Synonym
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}} {{Treatment/ID/Synonym
 
|name=Acnida cuspidata
 
|name=Acnida cuspidata
 
|authority=Bertero ex Sprengel
 
|authority=Bertero ex Sprengel
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|elevation=0-100 m
 
|elevation=0-100 m
 
|distribution=Ala.;Ark.;Fla.;Ga.;La.;Miss.;N.C.;Tenn.;Tex.;Va.;e Mexico;West Indies;n South America.
 
|distribution=Ala.;Ark.;Fla.;Ga.;La.;Miss.;N.C.;Tenn.;Tex.;Va.;e Mexico;West Indies;n South America.
|discussion=<p>Plants of Amaranthus australis, a herbaceous annual, can be amazingly tall, with a single hollow main stem, up to 9 m, and the stem base can reach 30 cm in diameter. Large plants may somewhat resemble young trees of Taxodium distichum var. imbricarium, pondcypress.</p>
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|discussion=<p>Plants of <i>Amaranthus australis</i>, a herbaceous annual, can be amazingly tall, with a single hollow main stem, up to 9 m, and the stem base can reach 30 cm in diameter. Large plants may somewhat resemble young trees of <i>Taxodium distichum </i>var.<i> imbricarium</i>, pondcypress.</p>
 
|tables=
 
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|references=
 
|references=
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|publication year=1955
 
|publication year=1955
 
|special status=
 
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V4/V4_812.xml
+
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V4/V4_812.xml
 
|genus=Amaranthus
 
|genus=Amaranthus
 
|subgenus=Amaranthus subg. Acnida
 
|subgenus=Amaranthus subg. Acnida

Revision as of 17:31, 18 September 2019

Stems erect, branched, stout to robust, usually 1.5–3 m (occasionally to 9 m!) × 30 cm. Leaves: petiole 1/3–2/3 length of blade; blade narrowly lanceolate to narrowly ovate, 10–20 × 1–4 cm, base cuneate, margins entire, plane, apex acute or long-attenuate to acuminate. Inflorescences mostly terminal, linear spikes to panicles, usually interrupted. Bracts: of pistillate flowers 1.5–2 mm; of staminate flowers with moderately heavy midribs, 1.5–2 mm. Pistillate flowers: tepals absent; style branches spreading; stigmas 3–5. Staminate flowers: tepals 5, inner tepals with moderately prominent, excurrent midribs, equal, 2–2.5 mm, apex subacute to mucronulate; stamens 5. Utricles stramineous to brown, with 3(–5) longitudinal ridges corresponding to 3–5 style branches, elliptic or obovoid, 1.5–2.5 mm, slightly fleshy, smooth (slightly rugose in herbarium specimens). Seeds reddish brown to dark brown, 1–1.2 mm diam., shiny.


Phenology: Flowering summer–fall.
Habitat: Freshwater and brackish wetland habitats, coastal marshes, swamps, riverbanks, bayous, canals, ditches, estuaries, lakeshores, hammocks
Elevation: 0-100 m

Distribution

Ala., Ark., Fla., Ga., La., Miss., N.C., Tenn., Tex., Va., e Mexico, West Indies, n South America.

Discussion

Plants of Amaranthus australis, a herbaceous annual, can be amazingly tall, with a single hollow main stem, up to 9 m, and the stem base can reach 30 cm in diameter. Large plants may somewhat resemble young trees of Taxodium distichum var. imbricarium, pondcypress.

Selected References

None.

Lower Taxa

None.
... more about "Amaranthus australis"
Sergei L. Mosyakin +  and Kenneth R. Robertson +
(A. Gray) J. D. Sauer +
Acnida australis +
Southern water-hemp +  and southern amaranth +
Ala. +, Ark. +, Fla. +, Ga. +, La. +, Miss. +, N.C. +, Tenn. +, Tex. +, Va. +, e Mexico +, West Indies +  and n South America. +
0-100 m +
Freshwater and brackish wetland habitats, coastal marshes, swamps, riverbanks, bayous, canals, ditches, estuaries, lakeshores, hammocks +
Flowering summer–fall. +
Acnida alabamensis +, Acnida cannabina var. australis +  and Acnida cuspidata +
Amaranthus australis +
Amaranthus sect. Acnida +
species +