Difference between revisions of "Amaranthus greggii"
Proc. Amer. Acad. Arts 12: 274. 1877.
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|common_names=Gregg’s amaranth;Josiah amaranth | |common_names=Gregg’s amaranth;Josiah amaranth | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=F | ||
| + | |label=Illustrated | ||
| + | }} | ||
|basionyms= | |basionyms= | ||
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name=Amaranthus greggii | name=Amaranthus greggii | ||
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|authority=S. Watson | |authority=S. Watson | ||
|rank=species | |rank=species | ||
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|publication title=Proc. Amer. Acad. Arts | |publication title=Proc. Amer. Acad. Arts | ||
|publication year=1877 | |publication year=1877 | ||
| − | |special status= | + | |special status=Illustrated |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V4/V4_819.xml |
|genus=Amaranthus | |genus=Amaranthus | ||
|subgenus=Amaranthus subg. Acnida | |subgenus=Amaranthus subg. Acnida | ||
Latest revision as of 22:01, 5 November 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
Distribution
La., Tex., Mexico.
Discussion
According to J. D. Sauer (1972b), Amaranthus myrianthus Standley most probably is a hybrid between A. arenicola and A. greggii.
Selected References
None.