Difference between revisions of "Eleocharis flavescens"
Symb. Antill. 4: 116. 1903.
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|name=Scirpus flavescens | |name=Scirpus flavescens | ||
|authority=Poiret | |authority=Poiret | ||
| + | |rank=species | ||
|publication_title=in J. Lamarck et al., Encycl. | |publication_title=in J. Lamarck et al., Encycl. | ||
|publication_place=6: 756. 1804 | |publication_place=6: 756. 1804 | ||
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name=Eleocharis flavescens | name=Eleocharis flavescens | ||
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|authority=(Poiret) Urban | |authority=(Poiret) Urban | ||
|rank=species | |rank=species | ||
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|publication year=1903 | |publication year=1903 | ||
|special status= | |special status= | ||
| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V23/V23_148.xml |
|genus=Eleocharis | |genus=Eleocharis | ||
|subgenus=Eleocharis subg. Eleocharis | |subgenus=Eleocharis subg. Eleocharis | ||
Revision as of 20:05, 16 December 2019
Plants with creeping rhizomes 0.5–1 mm thick. Culms 3–42 cm × 0.3–0.6 mm. Leaves: distal leaf sheaths often disintegrating, thinly membranous-translucent, inflated distally, often wrinkled, apex blunt. Spikelets ellipsoid, 1.5–9 × 1–3.5 mm, apex acute to acuminate; proximal scale without flower, not amplexicaulous; floral scales to 65, 5–7 per mm of rachilla, loosely appressed to appressed, elliptic, 1–3 × 0.4–1.6 mm, membranous, apex acute. Flowers: perianth bristles (0–)5–8, typically 7, white to stramineous, spinules dense to few; styles 2-fid, rarely 3-fid. Achenes stramineous to green or dark brown, biconvex, rarely trigonous, obovoid to obpryiform, 0.4–1.1 × 0.3–0.8 mm, very finely reticulate at 40X. Tubercles whitish to stramineous or green, 0.2–0.7 × 0.2–0.4 mm, apex acute to acuminate.
Distribution
Temperate North America, West Indies, South America.
Discussion
Varieties 2 (2 in the flora).
The varieties of Eleocharis flavescens are difficult to delimit, especially in the south, and identifications of some specimens to variety are problematic.
Selected References
None.
Key
| 1 | Achenes red-brown to dark brown when ripe, 0.4–0.8(–1.1) × 0.3–0.6 mm, apex rarely highly constricted proximal to tubercle; flowers with perianth bristles typically shorter than to as long as achene. | Eleocharis flavescens var. flavescens |
| 1 | Achenes green to golden-brown, 0.5–1.1 × 0.4–0.8 mm, often highly constricted proximal to tubercle; flowers with perianth bristles typically longer than achene. | Eleocharis flavescens var. olivacea |