Difference between revisions of "Cyperus lentiginosus"
Publ. Field Columbian Mus., Bot. Ser. 3: 74. 1903.
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|place=3: 74. 1903 | |place=3: 74. 1903 | ||
|year=1903 | |year=1903 | ||
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| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=F | ||
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|name=Cyperus strigosus var. gracilis | |name=Cyperus strigosus var. gracilis | ||
|authority=Britton | |authority=Britton | ||
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}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Cyperus tenuis var. lentiginosus | |name=Cyperus tenuis var. lentiginosus | ||
|authority=(Millspaugh & Chase) Kükenthal | |authority=(Millspaugh & Chase) Kükenthal | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Cyperaceae;Cyperus;Cyperus subg. Cyperus;Cyperus lentiginosus | |hierarchy=Cyperaceae;Cyperus;Cyperus subg. Cyperus;Cyperus lentiginosus | ||
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name=Cyperus lentiginosus | name=Cyperus lentiginosus | ||
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|authority=Millspaugh & Chase | |authority=Millspaugh & Chase | ||
|rank=species | |rank=species | ||
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|publication title=Publ. Field Columbian Mus., Bot. Ser. | |publication title=Publ. Field Columbian Mus., Bot. Ser. | ||
|publication year=1903 | |publication year=1903 | ||
| − | |special status= | + | |special status=Illustrated |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V23/V23_320.xml |
|genus=Cyperus | |genus=Cyperus | ||
|subgenus=Cyperus subg. Cyperus | |subgenus=Cyperus subg. Cyperus | ||
Latest revision as of 20:39, 5 November 2020
Herbs, perennial, cespitose, rhizomatous. Culms trigonous, (1–) 20–40(–75) cm × 1–1.5(–2.5) mm, glabrous. Leaves inversely W-shaped, 10–40(–70) cm × (1–)3–6(–10) mm. Inflorescences: spikes 1(–3), broadly and loosely ovoid to oblong-ellipsoid, (15–)20–30(–50) × 20–30(–45) mm; bracts (3–)5–7(–10), ascending at 30(–45)°, inversely W-shaped, 10–30(–50) cm × (1–)3–5(–11) mm; rays (2–)3–6(–12), (1–)3–10(–17) cm; rachilla deciduous, wings ca. 0.3 mm wide. Spikelets (10–)25–50(–100), ± terete, (appearing compressed due to excurved apices of floral scales), (8–)12–15(–24) × (0.8–)1.1–1.4(–1.8) mm; floral scales persistent, (4–)6–8(–14), golden brown, off-white to stramineous, densely red-glandular punctate, green medially, 3–4-ribbed laterally, 3–5-ribbed medially, oblong-lanceolate, (3.2–)4–4.5 × 1.2–1.6 mm, apex blunt, mucronulate to mucronate, mucro 0.2–0.5 mm; proximal scales mucronulate, distal scales mucronate; terminal scale conduplicate. Flowers: anthers 0.5–0.8(–1.4) mm; styles 0.8–1 mm; stigmas 1–2 mm. Achenes brown, ± sessile to stipitate, oblong-ellipsoid, 1.7–2 × 0.6–0.7 mm, 0.1(–0.2) × 0.2 mm, apex rounded, apiculate from dark purple style base, surfaces papillose.
Phenology: Fruiting spring–summer.
Habitat: Thickets, open woods
Elevation: 0–50 m
Distribution
Fla., Tex., Mexico, West Indies.
Discussion
Cyperus lentiginosus has been treated as a variety of C. tenuis (G. Kükenthal 1935–1936). The two taxa differ in the longer scales with cuspidate apices of C. lentiginosus, the inversely W-shaped leaves and bracts (those of C. tenuis are V-shaped), and the open spikes (those of C. tenuis are dense).
Selected References
None.