Difference between revisions of "Cyperus flavescens"
Sp. Pl. 1: 46. 1753.
FNA>Volume Importer |
imported>Volume Importer |
||
| (6 intermediate revisions by 2 users not shown) | |||
| Line 6: | Line 6: | ||
|place=1: 46. 1753 | |place=1: 46. 1753 | ||
|year=1753 | |year=1753 | ||
| + | }} | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=F | ||
| + | |label=Illustrated | ||
}} | }} | ||
|basionyms= | |basionyms= | ||
| Line 11: | Line 15: | ||
|name=Cyperus flavescens var. poiformis | |name=Cyperus flavescens var. poiformis | ||
|authority=(Pursh) Fernald | |authority=(Pursh) Fernald | ||
| − | }}{{Treatment/ID/Synonym | + | |rank=variety |
| + | }} {{Treatment/ID/Synonym | ||
|name=Cyperus poiformis | |name=Cyperus poiformis | ||
|authority=(Linnaeus) Reichenbach | |authority=(Linnaeus) Reichenbach | ||
| − | }}{{Treatment/ID/Synonym | + | |rank=species |
| + | }} {{Treatment/ID/Synonym | ||
|name=Pycreus flavescens | |name=Pycreus flavescens | ||
| − | |authority= | + | |authority= |
| + | |rank=species | ||
}} | }} | ||
|hierarchy=Cyperaceae;Cyperus;Cyperus subg. Pycreus;Cyperus flavescens | |hierarchy=Cyperaceae;Cyperus;Cyperus subg. Pycreus;Cyperus flavescens | ||
| Line 32: | Line 39: | ||
|elevation=0–800 m | |elevation=0–800 m | ||
|distribution=Ont.;Ala.;Ark.;Calif.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Kans.;Ky.;La.;Md.;Mass.;Mich.;Miss.;Mo.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;S.C.;Tenn.;Tex.;Va.;W.Va.;West Indies;South America;Eurasia;Africa. | |distribution=Ont.;Ala.;Ark.;Calif.;Del.;D.C.;Fla.;Ga.;Ill.;Ind.;Kans.;Ky.;La.;Md.;Mass.;Mich.;Miss.;Mo.;N.J.;N.Y.;N.C.;Ohio;Okla.;Pa.;S.C.;Tenn.;Tex.;Va.;W.Va.;West Indies;South America;Eurasia;Africa. | ||
| − | |discussion=<p>North American populations have been distinguished as Cyperus flavescens var. poiformis; their taxonomic separation was not supported by M. L. Corcoran’s (1941) careful study. Plants of Mexico and Central America consistently have purplish rather than yellowish floral scales and may be recognized as C. flavescens var. piceus (Liebmann) Fernald (G. C. Tucker 1983, 1994).</p> | + | |discussion=<p>North American populations have been distinguished as <i>Cyperus flavescens</i> var. poiformis; their taxonomic separation was not supported by M. L. Corcoran’s (1941) careful study. Plants of Mexico and Central America consistently have purplish rather than yellowish floral scales and may be recognized as <i>C. flavescens</i> var. piceus (Liebmann) Fernald (G. C. Tucker 1983, 1994).</p> |
|tables= | |tables= | ||
|references= | |references= | ||
| Line 41: | Line 48: | ||
-->{{#Taxon: | -->{{#Taxon: | ||
name=Cyperus flavescens | name=Cyperus flavescens | ||
| − | |||
|authority=Linnaeus | |authority=Linnaeus | ||
|rank=species | |rank=species | ||
| Line 55: | Line 61: | ||
|publication title=Sp. Pl. | |publication title=Sp. Pl. | ||
|publication year=1753 | |publication year=1753 | ||
| − | |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_259.xml |
|genus=Cyperus | |genus=Cyperus | ||
|subgenus=Cyperus subg. Pycreus | |subgenus=Cyperus subg. Pycreus | ||
Latest revision as of 20:39, 5 November 2020
Herbs, annual, cespitose. Culms trigonous, (2–)4–30 cm × 0.4–2 mm, glabrous. Leaves 1–5, (blades often absent, base of culm with 1 reddish sheath bearing minute blade tooth 1–2 mm), (3–)10–18 cm × (0.5–)1.5–2(–2.6) mm. Inflorescences: spikes 1–3, ovoid or ± digitate, 10–30 × 8–26 mm; rays 1–4(–6), 0.5–3(–9) cm; bracts 2–3, approximately horizontal, 1–12 cm × 0.5–2.5 mm. Spikelets 1–6, compressed, oblong-lanceoloid, 5–15 × (2–)2.3–2.8 mm; floral scales (4–)8–24, closely imbricate, laterally yellow to yellowish brown, margins light brown to clear, medially green, laterally ribless, medially 2–3-ribbed, 2-keeled basally, ovate, (1.5–)1.8–2.2 × 1.8 mm, apex obtuse. Flowers: stamens 3; anthers 0.4 mm, connectives not prolonged; styles 0.5–1 mm; stigmas 0.5–0.8 mm. Achenes jet black to reddish brown, slightly stipitate, obovoid, 1–1.2 × 0.8 mm, apex apiculate, surface with network of rectangular longitudinally elongate cells and transverse undulations.
Phenology: Fruiting summer–early fall.
Habitat: Damp, often disturbed soils
Elevation: 0–800 m
Distribution
Ont., Ala., Ark., Calif., Del., D.C., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Mass., Mich., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Va., W.Va., West Indies, South America, Eurasia, Africa.
Discussion
North American populations have been distinguished as Cyperus flavescens var. poiformis; their taxonomic separation was not supported by M. L. Corcoran’s (1941) careful study. Plants of Mexico and Central America consistently have purplish rather than yellowish floral scales and may be recognized as C. flavescens var. piceus (Liebmann) Fernald (G. C. Tucker 1983, 1994).
Selected References
None.