Difference between revisions of "Amaranthus greggii"

S. Watson

Proc. Amer. Acad. Arts 12: 274. 1877.

Common names: Gregg’s amaranth Josiah amaranth
Illustrated
Treatment appears in FNA Volume 4. Mentioned on page 412, 413, 416, 418.
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|common_names=Gregg’s amaranth;Josiah amaranth
 
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|special_status={{Treatment/ID/Special_status
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|code=F
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|label=Illustrated
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|publication title=Proc. Amer. Acad. Arts
 
|publication title=Proc. Amer. Acad. Arts
 
|publication year=1877
 
|publication year=1877
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|special status=Illustrated
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V4/V4_819.xml
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|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V4/V4_819.xml
 
|genus=Amaranthus
 
|genus=Amaranthus
 
|subgenus=Amaranthus subg. Acnida
 
|subgenus=Amaranthus subg. Acnida

Revision as of 23:19, 27 May 2020

Plants glabrous or glabrescent. Stems erect to ascending, much-branched from base, 0.3–1 m. Leaves: petiole shorter than blade; blade ovate, or rhombic-ovate to elliptic, 1.5–4 × 0.5–2 cm, thick, coarse, base cuneate to rounded, margins entire, plane or irregularly undulate, apex rounded-obtuse to emarginate, with terminal mucro. Inflorescences mostly terminal, spikes to panicles, usually erect, thick, flexible. Bracts: of pistillate flowers with short, excurrent midrib, 1.5–2.5 mm, shorter than tepals, apex acute or acuminate; of staminate flowers shorter than tepals, apex acute. Pistillate flowers: tepals with dark, prominent midrib not excurrent, spatulate, subequal, 2–3 mm, apex obtuse to subacute, with terminal mucro; style branches spreading; stigmas 3. Staminate flowers: tepals 5, equal, 2–3 mm, apex obtuse to subacute; inner tepals: with apex indistinctly mucronulate; stamens 5. Utricles light brown, elliptic, 3 mm, equaling tepals, walls somewhat fleshy, smooth, indehiscent. Seeds dark brown, 1.2–1.7 mm diam., shiny.


Phenology: Flowering summer–fall.
Habitat: Coastal sand dunes, sea beaches
Elevation: 0-50 m

Discussion

According to J. D. Sauer (1972b), Amaranthus myrianthus Standley most probably is a hybrid between A. arenicola and A. greggii.

Selected References

None.

Lower Taxa

None.
... more about "Amaranthus greggii"
Sergei L. Mosyakin +  and Kenneth R. Robertson +
S. Watson +
Undefined subg. Acnida +
Gregg’s amaranth +  and Josiah amaranth +
La. +, Tex. +  and Mexico. +
0-50 m +
Coastal sand dunes, sea beaches +
Flowering summer–fall. +
Proc. Amer. Acad. Arts +
Illustrated +
Acanthochiton +, Acnida +, Albersia +, Amblogyna +, Euxolus +, Mengea +, Sarratia +  and Scleropus +
Amaranthus greggii +
Amaranthus sect. Saueranthus +
species +