Difference between revisions of "Cyperus retrofractus"
in J. Carey, Carices North. U.S., 519. 1847.
imported>Volume Importer |
imported>Volume Importer |
||
Line 1: | Line 1: | ||
{{Treatment/ID | {{Treatment/ID | ||
|accepted_name=Cyperus retrofractus | |accepted_name=Cyperus retrofractus | ||
− | |accepted_authority=(Linnaeus) Torrey | + | |accepted_authority=(Linnaeus) Torrey |
|publications={{Treatment/Publication | |publications={{Treatment/Publication | ||
|title=in J. Carey, Carices North. U.S., | |title=in J. Carey, Carices North. U.S., | ||
Line 58: | Line 58: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Cyperus retrofractus | name=Cyperus retrofractus | ||
− | |authority=(Linnaeus) Torrey | + | |authority=(Linnaeus) Torrey |
|rank=species | |rank=species | ||
|parent rank=subgenus | |parent rank=subgenus | ||
Line 72: | Line 72: | ||
|publication year=1847 | |publication year=1847 | ||
|special status=Illustrated;Endemic | |special status=Illustrated;Endemic | ||
− | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V23/V23_307.xml |
|genus=Cyperus | |genus=Cyperus | ||
|subgenus=Cyperus subg. Cyperus | |subgenus=Cyperus subg. Cyperus |
Latest revision as of 21:39, 5 November 2020
Herbs, perennial, cespitose. Culms with cormlike bases, sharply trigonous, 25–90 cm, glabrous proximally, minutely scabridulous distally. Leaves V-shaped, 14–40 cm × 3.5–8 mm, (pubescent on adaxial side of midrib). Inflorescences: spikes loose, obtrulloid to obdeltoid (broadest near apex, nearly as long as wide), 20–28(–34) × (12–)15–30 mm; rays 4–13, (1–)4–24 cm (longest ray shorter than bracts), glabrous; bracts 3–12, ascending at 30–45°, flat, 3–25 cm × 3–7 mm; rachilla persistent, wings 0.4–0.6 mm wide, covering 3/4 of mature achene. Spikelets 30–50, proximal one reflexed, distal ones divaricate, linear-lanceoloid, ± terete, (6.5–) 8–10(–17) × 0.5–0.7 mm; floral scales persistent, 3–6(–8), appressed, stramineous (suffused with reddish purple), 4–5-ribbed laterally, ovate-lanceolate, (4–)4.4–4.9(–5.4) × 1.3–1.5 mm; terminal scale not spinose, apex straight, excurved mucronate, or cuspidate. Flowers: anthers 0.7–1.2 mm; styles 1.5–2 mm; stigmas 2–2.5 mm. Achenes brown to brownish black, narrowly oblong, (2.2–)2.5–3 × 0.6–0.7 mm, base cuneate, apex obtuse, apiculate, surfaces puncticulate.
Phenology: Fruiting summer.
Habitat: Roadsides, pastures, disturbed sites in sandy or clayey soils
Elevation: 0–300 m
Distribution
![V23 307-distribution-map.jpg](/w/images/2/22/V23_307-distribution-map.jpg)
Ala., Ark., Del., D.C., Ga., Ky., Mo., N.J., N.C., Ohio, Pa., S.C., Tenn., Va.
Discussion
For information concerning nomenclature of Cyperus retrofractus, see J. R. Carter and C. E. Jarvis (1986).
Selected References
None.