Amaranthus crispus

(Lespinasse & Thévenau) A. Braun ex J. M. Coulter & S. Watson in A. Gray et al.

in A. Gray et al., Manual ed. 6, 428. 1890.

Common names: Crisp-leaved amaranth
IntroducedIllustrated
Basionym: Euxolus crispus Les pinasse & Thévenau Bull. Soc. Bot. France 6: 656. 1859
Treatment appears in FNA Volume 4. Treatment on page 431. Mentioned on page 414, 428.

Plants annual, sparsely pubescent. Stems prostrate to ascending, branched mainly from base, 0.1–0.4 (–0.5) m. Leaves: petiole shorter than blade; blade rhombic-ovate to oblong, 0.5–1.5 (–2.5) × 0.3–0.8 (–1.5) cm, base cuneate, margins crisped-erose, conspicuously undulate, apex acute to subobtuse, with short mucro. Inflorescences axillary glomerules, green, axes not thickened, not indurage at maturity. Bracts lanceolate to oblong-lanceolate, 1.2–1.7 mm, ± equaling or slightly shorter than tepals. Pistillate flowers: tepals 5, spatulate-oblong, equal to subequal, 1.2–1.7 mm, margins entire, apex rounded to subacute; style-branches spreading; stigmas 3, sessile. Staminate flowers intermixed with pistillate; tepals 5; stamens 5. Utricles ellipsoid or obovoid, 1.5–2 mm, slightly longer than tepals, smooth to slightly wrinkled, indehiscent. Seeds black to dark reddish-brown, lenticular to obovoid-lenticular, 0.7–1 mm diam., smooth.


Phenology: Flowering summer–fall.
Habitat: Waste places, other disturbed habitats, mostly at seaports and on ballast
Elevation: 0-500 m

Distribution

Introduced; N.J., N.Y., N.C., Va., native to South America (Argentina), in s Eurasia and other regions

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Amaranthus crispus"
Sergei L. Mosyakin +  and Kenneth R. Robertson +
(Lespinasse & Thévenau) A. Braun ex J. M. Coulter & S. Watson in A. Gray et al. +
not thickened +
cuneate +
Euxolus crispus +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
rhombic-ovate +  and oblong +
0.3cm;0.8cm +
persistent +
more or less equaling or slightly shorter +
lanceolate +  and oblong-lanceolate +
Crisp-leaved amaranth +
N.J. +, N.Y. +, N.C. +, Va. +, native to South America (Argentina) +  and in s Eurasia and other regions +
0-500 m +
peripheral +
staminate +  and pistillate +
hypogynous +
minute +  and small +
not +  and dehiscent +
Waste places, other disturbed habitats, mostly at seaports and on ballast +
reduced +
undulate +
scarious +  and membranaceous +
Flowering summer–fall. +
rudimentary +
in A. Gray et al., Manual ed. +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
lenticular +  and obovoid-lenticular +
Introduced +  and Illustrated +
prostrate +  and decumbent +
prostrate +  and ascending +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
not fleshy +
slender +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Acanthochiton +, Acnida +, Albersia +, Amblogyna +, Euxolus +, Mengea +, Sarratia +  and Scleropus +
Amaranthus crispus +
Amaranthus subg. Albersia +
species +
distinct +
spatulate-oblong +
subequal +
0.12 cm1.2 mm <br />0.0012 m <br /> (0.17 cm1.7 mm <br />0.0017 m <br />) +
indurate +, membranaceous +, chartaceous +  and scarious +
walled +  and 3(-5)-veined +
slightly longer +
smooth +  and slightly wrinkled +
obovoid +  and ellipsoid +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
membranaceous +