Difference between revisions of "Cyperus pumilus"
Cent. Pl. II, 6. 1756.
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|place=6. 1756 | |place=6. 1756 | ||
|year=1756 | |year=1756 | ||
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| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=I | ||
| + | |label=Introduced | ||
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| + | |code=F | ||
| + | |label=Illustrated | ||
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|basionyms= | |basionyms= | ||
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|elevation=0–50 m | |elevation=0–50 m | ||
|distribution=Fla.;West Indies (introduced);Asia;Africa (including Madagascar);Indian Ocean Islands;Pacific Islands;Australia. | |distribution=Fla.;West Indies (introduced);Asia;Africa (including Madagascar);Indian Ocean Islands;Pacific Islands;Australia. | ||
| + | |introduced=true | ||
|discussion=<p><i>Cyperus pumilus</i> is distinctive because it is our only distigmatic <i>Cyperus</i> with awned floral scales.</p><!-- | |discussion=<p><i>Cyperus pumilus</i> is distinctive because it is our only distigmatic <i>Cyperus</i> with awned floral scales.</p><!-- | ||
--><p><i>Cyperus</i> hyalinus Vahl, a southeastern Asian and Australian species, has recently been collected in Miami-Dade County, Florida (Mears s.n., EIU, VSC). This is an aberrant species sometimes placed in the monotypic genus Queenslandiella as Q. hyalina (Vahl) F. Ballard; it differs from <i>C. pumilus</i> in having deciduous rachillae as well as deciduous floral scales.</p> | --><p><i>Cyperus</i> hyalinus Vahl, a southeastern Asian and Australian species, has recently been collected in Miami-Dade County, Florida (Mears s.n., EIU, VSC). This is an aberrant species sometimes placed in the monotypic genus Queenslandiella as Q. hyalina (Vahl) F. Ballard; it differs from <i>C. pumilus</i> in having deciduous rachillae as well as deciduous floral scales.</p> | ||
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|publication title=Cent. Pl. II, | |publication title=Cent. Pl. II, | ||
|publication year=1756 | |publication year=1756 | ||
| − | |special status= | + | |special status=Introduced;Illustrated |
| − | |source xml=https:// | + | |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-data-curation.git/src/bb6b7e3a7de7d3b7888a1ad48c7fd8f5c722d8d6/coarse_grained_fna_xml/V23/V23_260.xml |
|genus=Cyperus | |genus=Cyperus | ||
|subgenus=Cyperus subg. Pycreus | |subgenus=Cyperus subg. Pycreus | ||
Revision as of 21:32, 27 May 2020
Herbs, annual, cespitose. Culms trigonous, 1–35 cm × 0.5–1 mm, glabrous. Leaves flat, 5–20 cm × 1–2 mm. Inflorescences: heads ± digitate, 8–26 mm diam.; rays 1–6, 0.5–5 cm; bracts 3–4, ± horizontal, flat, 3–18 cm × 1–2 mm. Spikelets 6–25, ovoid to linear-lanceoloid, compressed, 4–15 × 1–2 mm; floral scales 8–28(–40), clear, laterally ribless, ovate, 1.4–1.6 × 0.8 mm, apex awned, awn excurved, 0.3–0.5 mm. Flowers: stamens 1–2; anthers 0.2 mm; styles 0.5 mm; stigmas 0.3 mm. Achenes dark brown to black, sessile, obovoid, 0.6 × 0.4 mm, apex obtuse, apiculate, surfaces minutely punctate.
Phenology: Fruiting spring–summer.
Habitat: Disturbed, sandy soils
Elevation: 0–50 m
Distribution
Introduced; Fla., West Indies (introduced), Asia, Africa (including Madagascar), Indian Ocean Islands, Pacific Islands, Australia.
Discussion
Cyperus pumilus is distinctive because it is our only distigmatic Cyperus with awned floral scales.
Cyperus hyalinus Vahl, a southeastern Asian and Australian species, has recently been collected in Miami-Dade County, Florida (Mears s.n., EIU, VSC). This is an aberrant species sometimes placed in the monotypic genus Queenslandiella as Q. hyalina (Vahl) F. Ballard; it differs from C. pumilus in having deciduous rachillae as well as deciduous floral scales.
Selected References
None.