Flora of North America species comparison

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Cyperus setigerus

lean flatsedge
Habit Herbs, perennial, rhizomatous.
Culms

trigonous, 50–100 cm × 2.5–3 mm, glabrous.
Leaves

V-shaped, 20–50 cm × 4–7 mm.
Inflorescences

spikes loosely ovoid, 1.5–7 cm wide;

rays 5–13, 1–21 cm; 2d order rays 0.5–3 cm;

bracts 3–8, V-shaped, 5–50 cm × 2.5–5.6 mm;

rachilla persistent, wings 0.4–0.6 mm wide.
Spikelets

5–30, compressed, linear, (5–)12–40 × 1.5–2.2 mm;

floral scales deciduous, 6–24, reddish brown to yellowish brown laterally, greenish medially, 5–7-ribbed, elliptic, 3–4 × 1.4–1.6 mm, apex obtuse.
Flowers

anthers 1.5–2 mm;

styles 2–2.3 mm;

stigmas 2–3 mm.
Achenes

dark brown, sessile, oblong, 1.5 × 0.4–0.5 mm, apex apiculate, surfaces puncticulate.

Cyperus setigerus
Phenology Fruiting summer.
Habitat Ditches, croplands
Elevation 100–1000 m (300–3300 ft)
Distribution
from FNA
KS; MO; NM; OK; TX
[BONAP county map]
Source FNA vol. 23, p. 170.
Parent taxa Cyperaceae > Cyperus > subg. Cyperus
Sibling taxa
C. acuminatus, C. aggregatus, C. alopecuroides, C. amabilis, C. articulatus, C. bipartitus, C. cephalanthus, C. compressus, C. croceus, C. cuspidatus, C. dentatus, C. dentoniae, C. diandrus, C. difformis, C. digitatus, C. dipsaceus, C. distans, C. distinctus, C. drummondii, C. echinatus, C. elegans, C. entrerianus, C. eragrostis, C. erythrorhizos, C. esculentus, C. fendlerianus, C. filicinus, C. filiculmis, C. filiformis, C. flavescens, C. flavicomus, C. floribundus, C. fugax, C. fuligineus, C. fuscus, C. giganteus, C. gracilis, C. granitophilus, C. grayi, C. grayoides, C. haspan, C. hermaphroditus, C. houghtonii, C. hypopitys, C. hystricinus, C. involucratus, C. iria, C. laevigatus, C. lancastriensis, C. lanceolatus, C. lecontei, C. lentiginosus, C. ligularis, C. lupulinus, C. manimae, C. microiria, C. mutisii, C. niger, C. ochraceus, C. odoratus, C. onerosus, C. ovatus, C. owanii, C. oxylepis, C. pallidicolor, C. papyrus, C. parishii, C. pilosus, C. planifolius, C. plukenetii, C. polystachyos, C. prolifer, C. prolixus, C. pseudothyrsiflorus, C. pseudovegetus, C. pumilus, C. reflexus, C. refractus, C. retroflexus, C. retrofractus, C. retrorsus, C. rotundus, C. sanguinolentus, C. schweinitzii, C. serotinus, C. seslerioides, C. spectabilis, C. sphacelatus, C. sphaerolepis, C. squarrosus, C. strigosus, C. surinamensis, C. tetragonus, C. thyrsiflorus, C. virens
Name authority Torrey & Hooker: Ann. Lyceum Nat. Hist. New York 3: 434. (1836)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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