Fuirena simplex var. aristulata

(Torrey) Kral

Sida 7: 336. 1978.

IllustratedEndemic
Basionym: Fuirena squarrosa var. aristulata Torrey Ann. Lyceum Nat. Hist. New York 3: 291. 1836
Treatment appears in FNA Volume 23. Treatment on page 37. Mentioned on page 36.

Herbs usually annual, rarely taller than 30–40 cm; rhizomes mostly absent, when present very short. Culms tufted (more slender than in preceding variety). Leaves: principal blades 5–12 cm. Spikelets to 12, lanceovoid or lanceoloid; fertile scales 2–3 mm. Flowers: anthers 1–3, 0.5–0.6 mm.


Phenology: Fruiting summer–fall.
Habitat: Sand or clay, silt, of prairie swales, alluvial terraces, moist waste sites, pond and lakeshores
Elevation: 0–500 m

Distribution

V23 52-distribution-map.jpg

Ark., Kans., La., Mo., Nebr., N.Mex., Okla., Tex.

Discussion

Most North American material of var. simplex is cespitose, the rhizomes short. In such specimens the evident perennial habit and the longer anthers are more reliable characteristics.

Selected References

None.

Lower Taxa

None.

"shortened" is not a number.

trigonous-rhomboid +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
Robert Kral +
(Torrey) Kral +
persistent +
Fuirena squarrosa var. aristulata +
reduced +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scabridulous +
short +  and elongate +
parallel +  and divergent +
terete +, rolled +  and plicate +
spaced +  and tufted +
erect +  and leaning +
3-5-angled +
hispid-hirsute +
Ark. +, Kans. +, La. +, Mo. +, Nebr. +, N.Mex. +, Okla. +  and Tex. +
0–500 m +
yellow +, redbrown +, brown +, glossy +  and deep +
hypogynous +  and subtending +
biconvex +  and trigonous +
Sand or clay, silt, of prairie swales, alluvial terraces, moist waste sites, pond and lakeshores +
pedunculate +  and sessile +
polystichous +
cauline +  and basal +
bristled +, or +, acute +, retuse +, rounded +  and ovate +
Fruiting summer–fall. +
2-3(-4)-carpellate +
glabrous adaxially glabrous +  and pilose +
5 cm50 mm <br />0.05 m <br /> (12 cm120 mm <br />0.12 m <br />) +
3 (?) +  and 1 (?) +
convergent +
adventitious +
stipitate-bladed +  and empty +
basal +  and proximal +
oblong;obovate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
lobed +  and forked +
Illustrated +  and Endemic +
0 +  and 12 +
lanceoloid;lanceovoid +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
long-exserted +
1 +  and 3 +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
Fuirena cylindrica +, Fuirena obtusiflora +, Fuirena primiera +, Fuirena schiedeana +, Fuirena squarrosa var. macrostachya +  and Fuirena zacapana +
Fuirena simplex var. aristulata +
Fuirena simplex +
variety +
not +  and rhizomatous +