familyCyperaceae
genusEleocharis
subgenusEleocharis subg. Eleocharis
sectionEleocharis sect. Eleogenus
speciesEleocharis engelmannii
Difference between revisions of "Eleocharis engelmannii"
Syn. Pl. Glumac. 2: 79. 1855.
Common names: Engelmann’s spike-rush
Synonyms: Eleocharis engelmannii var. detonsa A. Gray Eleocharis engelmannii var. monticola (Fernald) Svenson Eleocharis engelmannii var. robusta Fernald Eleocharis monticola Eleocharis monticola var. leviseta Fernald Eleocharis ovata var. detonsa (A. Gray) Mohlenbrock
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|name=Eleocharis engelmannii var. detonsa | |name=Eleocharis engelmannii var. detonsa | ||
|authority=A. Gray | |authority=A. Gray | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Eleocharis engelmannii var. monticola | |name=Eleocharis engelmannii var. monticola | ||
|authority=(Fernald) Svenson | |authority=(Fernald) Svenson | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Eleocharis engelmannii var. robusta | |name=Eleocharis engelmannii var. robusta | ||
|authority=Fernald | |authority=Fernald | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Eleocharis monticola | |name=Eleocharis monticola | ||
| − | |authority= | + | |authority= |
| + | |rank=species | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Eleocharis monticola var. leviseta | |name=Eleocharis monticola var. leviseta | ||
|authority=Fernald | |authority=Fernald | ||
| + | |rank=variety | ||
}} {{Treatment/ID/Synonym | }} {{Treatment/ID/Synonym | ||
|name=Eleocharis ovata var. detonsa | |name=Eleocharis ovata var. detonsa | ||
|authority=(A. Gray) Mohlenbrock | |authority=(A. Gray) Mohlenbrock | ||
| + | |rank=variety | ||
}} | }} | ||
|hierarchy=Cyperaceae;Eleocharis;Eleocharis subg. Eleocharis;Eleocharis sect. Eleogenus;Eleocharis (sect. Eleogenus) ser. Ovatae;Eleocharis engelmannii | |hierarchy=Cyperaceae;Eleocharis;Eleocharis subg. Eleocharis;Eleocharis sect. Eleogenus;Eleocharis (sect. Eleogenus) ser. Ovatae;Eleocharis engelmannii | ||
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| − | --><span class="statement" id="st-undefined" data-properties=""><b>Culms </b>2–40 cm × 0.5–1.5(–2) mm. <b>Leaves</b>: apex of distal leaf sheath obtuse to acute, tooth to 0.3 mm. <b>Spikelets</b> lanceoloid to subcylindric or ovoid, 5–10(–20) × 2–3(–4) mm, apex acute (to rounded); proximal scale empty, encircling ca. 2/3 of culm; floral scales 25–100(–200), 8–12 per mm of rachilla, orangebrown to stramineous, 2(–2.5) × 1–1.3 mm, midribs mostly keeled, ovate, apex narrowly rounded to subacute. <b>Flowers</b>: perianth bristles present or often absent, 5–8, brown, stout, rudimentary to slightly exceeding tubercle; stamens (2–)3; anthers brown to yellow, 0.3–0.7(–1) mm; styles 2–3-fid. <b>Achenes</b> 0.9–1.1(–1.5) × 0.7–1.1 mm. <b>Tubercles</b> depressed, subdeltoid, 0.1–0.3(–0.4) × 0.6–0.9(–1) mm, 1/10–2/5 as high as wide, 1/4 or less as high as achene, 9/10 as wide as achene, very rarely 2/5 as high as achene (in <i>E. engelmannii</i> < | + | --><span class="statement" id="st-undefined" data-properties=""><b>Culms </b>2–40 cm × 0.5–1.5(–2) mm. <b>Leaves</b>: apex of distal leaf sheath obtuse to acute, tooth to 0.3 mm. <b>Spikelets</b> lanceoloid to subcylindric or ovoid, 5–10(–20) × 2–3(–4) mm, apex acute (to rounded); proximal scale empty, encircling ca. 2/3 of culm; floral scales 25–100(–200), 8–12 per mm of rachilla, orangebrown to stramineous, 2(–2.5) × 1–1.3 mm, midribs mostly keeled, ovate, apex narrowly rounded to subacute. <b>Flowers</b>: perianth bristles present or often absent, 5–8, brown, stout, rudimentary to slightly exceeding tubercle; stamens (2–)3; anthers brown to yellow, 0.3–0.7(–1) mm; styles 2–3-fid. <b>Achenes</b> 0.9–1.1(–1.5) × 0.7–1.1 mm. <b>Tubercles</b> depressed, subdeltoid, 0.1–0.3(–0.4) × 0.6–0.9(–1) mm, 1/10–2/5 as high as wide, 1/4 or less as high as achene, 9/10 as wide as achene, very rarely 2/5 as high as achene (in <i>E. engelmannii</i> <i></i>var.<i> robusta</i>). <b>2n</b> = 10.</span><!-- |
-->{{Treatment/Body | -->{{Treatment/Body | ||
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|elevation=30–2400 m | |elevation=30–2400 m | ||
|distribution=Alta.;B.C.;Man.;Ont.;Ala.;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Mont.;Nebr.;N.H.;N.J.;N.Mex.;N.Y.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;R.I.;Tenn.;Tex.;Va.;Wash.;W.Va.;Wis. | |distribution=Alta.;B.C.;Man.;Ont.;Ala.;Ariz.;Ark.;Calif.;Colo.;Conn.;Del.;D.C.;Idaho;Ill.;Ind.;Iowa;Kans.;Ky.;Md.;Mass.;Mich.;Minn.;Miss.;Mo.;Mont.;Nebr.;N.H.;N.J.;N.Mex.;N.Y.;N.Dak.;Ohio;Okla.;Oreg.;Pa.;R.I.;Tenn.;Tex.;Va.;Wash.;W.Va.;Wis. | ||
| − | |discussion=<p>Robust plants known only from Missouri and described as <i>Eleocharis engelmannii</i> < | + | |discussion=<p>Robust plants known only from Missouri and described as <i>Eleocharis engelmannii</i> <i></i>var.<i> robusta</i> have well-developed caudices, culms to 2 mm wide (pressed), spikelets to 2 cm, floral scales to 2.5 mm and slightly cartilaginous, styles mostly trifid, achenes to 1.5 × 1 mm, and tubercles 0.3–0.5 × 0.7–1 mm and to 2/5 as high as achene. Some specimens are intermediate between <i>E. engelmannii</i> and <i>E. obtusa</i>, or rarely with <i>E. lanceolata</i>. I have not seen specimens to verify literature reports of <i>E. engelmannii</i> from Manitoba, Connecticut, Delaware, Idaho, New Hampshire, North Carolina, Oregon, Rhode Island, South Carolina, South Dakota, or Vermont.</p> |
|tables= | |tables= | ||
|references= | |references= | ||
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-->{{#Taxon: | -->{{#Taxon: | ||
name=Eleocharis engelmannii | name=Eleocharis engelmannii | ||
| − | |||
|authority=Steudel | |authority=Steudel | ||
|rank=species | |rank=species | ||
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|publication year=1855 | |publication year=1855 | ||
|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_158.xml |
|genus=Eleocharis | |genus=Eleocharis | ||
|subgenus=Eleocharis subg. Eleocharis | |subgenus=Eleocharis subg. Eleocharis | ||
Revision as of 21:05, 16 December 2019
Culms 2–40 cm × 0.5–1.5(–2) mm. Leaves: apex of distal leaf sheath obtuse to acute, tooth to 0.3 mm. Spikelets lanceoloid to subcylindric or ovoid, 5–10(–20) × 2–3(–4) mm, apex acute (to rounded); proximal scale empty, encircling ca. 2/3 of culm; floral scales 25–100(–200), 8–12 per mm of rachilla, orangebrown to stramineous, 2(–2.5) × 1–1.3 mm, midribs mostly keeled, ovate, apex narrowly rounded to subacute. Flowers: perianth bristles present or often absent, 5–8, brown, stout, rudimentary to slightly exceeding tubercle; stamens (2–)3; anthers brown to yellow, 0.3–0.7(–1) mm; styles 2–3-fid. Achenes 0.9–1.1(–1.5) × 0.7–1.1 mm. Tubercles depressed, subdeltoid, 0.1–0.3(–0.4) × 0.6–0.9(–1) mm, 1/10–2/5 as high as wide, 1/4 or less as high as achene, 9/10 as wide as achene, very rarely 2/5 as high as achene (in E. engelmannii var. robusta). 2n = 10.
Phenology: Fruiting spring–fall.
Habitat: Fresh shores, marshes, disturbed places
Elevation: 30–2400 m
Distribution
Alta., B.C., Man., Ont., Ala., Ariz., Ark., Calif., Colo., Conn., Del., D.C., Idaho, Ill., Ind., Iowa, Kans., Ky., Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., N.H., N.J., N.Mex., N.Y., N.Dak., Ohio, Okla., Oreg., Pa., R.I., Tenn., Tex., Va., Wash., W.Va., Wis.
Discussion
Robust plants known only from Missouri and described as Eleocharis engelmannii var. robusta have well-developed caudices, culms to 2 mm wide (pressed), spikelets to 2 cm, floral scales to 2.5 mm and slightly cartilaginous, styles mostly trifid, achenes to 1.5 × 1 mm, and tubercles 0.3–0.5 × 0.7–1 mm and to 2/5 as high as achene. Some specimens are intermediate between E. engelmannii and E. obtusa, or rarely with E. lanceolata. I have not seen specimens to verify literature reports of E. engelmannii from Manitoba, Connecticut, Delaware, Idaho, New Hampshire, North Carolina, Oregon, Rhode Island, South Carolina, South Dakota, or Vermont.
Selected References
None.
Lower Taxa
None.
... more about "Eleocharis engelmannii"
Engelmann’s spike-rush +
Alta. +, B.C. +, Man. +, Ont. +, Ala. +, Ariz. +, Ark. +, Calif. +, Colo. +, Conn. +, Del. +, D.C. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, Tenn. +, Tex. +, Va. +, Wash. +, W.Va. + and Wis. +
Present +
Syn. Pl. Glumac. +
1855 +
Eleocharis engelmannii +
Eleocharis (sect. Eleogenus) ser. Ovatae +
species +