Juncus scirpoides

Lamarck in J. Lamarck et al.

in J. Lamarck et al.,Encycl. 3: 267. 1789.

Common names: Scirpuslike rush
IllustratedEndemic
Synonyms: Juncus echinatus Muhlenberg Juncus scirpoides var. compositus Harper Juncus scirpoides var. genuinus Buchenau Juncus scirpoides var. macrostemon Engelmann Juncus scirpoides var. meridionalis Buchenau
Treatment appears in FNA Volume 22.

Herbs, perennial, rhizomatous, tosometimes nearly cespitose, 0.8–7 dm. Rhizomes usually tuberous, 2–4 mm diam. Culms erect, terete, 1–3 mm diam., smooth. Cataphylls 0–1. Leaves: basal 1–2, cauline 2–3, green; auricles 1–2 mm, apex rounded, membranaceous; blade terete, 2–23 cm × 1–2 mm, distal cauline leaf-blade 1.6–26 cm, equaling or longer than sheath. Inflorescences terminal panicles of 1–23 (–32) heads, 2.5–9 cm, branches ascending to erect; primary bracts erect; heads 20–60-flowered, spheric or usually lobed, 6–11 mm diam. Flowers: tepals green to straw-colored, lance-subulate, 2–3.5 mm, nearly equal, apex acuminate; stamens 3, anthers 1/3 filament length. Capsules exserted, straw-colored, 1-locular, lance-subulate, 3–4 mm, apex tapering, remaining attached at tip, valves not separating at dehiscence, fertile throughout or only proximal to middle. Seeds oblong, 0.4 mm, not tailed; body clear yellowbrown.


Phenology: Fruiting early summer–fall.
Habitat: Wet sandy soil, salt marshes, lake shores, ditches, meadows, wet woods
Elevation: 0–1400 m

Distribution

V22 207-distribution-map.jpg

Ala., Ark., Del., D.C., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Mich., Miss., Mo., Nebr., N.J., N.Y., N.C., Okla., Pa., S.C., Tenn., Tex., Va., W.Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Juncus scirpoides"
persistent +
tapering +, acuminate +  and rounded +
membranaceous +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Ralph E. Brooks* +  and Steven E. Clemants* +
Lamarck in J. Lamarck et al. +
2 cm20 mm <br />0.02 m <br /> (23 cm230 mm <br />0.23 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
clear yellowbrown +
ascending +  and erect +
terete +, involute +  and flat +
ascending;erect +
straw-colored +
lance-subulate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Scirpuslike rush +
1.6 cm16 mm <br />0.016 m <br /> (26 cm260 mm <br />0.26 m <br />) +
Ala. +, Ark. +, Del. +, D.C. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Md. +, Mich. +, Miss. +, Mo. +, Nebr. +, N.J. +, N.Y. +, N.C. +, Okla. +, Pa. +, S.C. +, Tenn. +, Tex. +, Va. +  and W.Va. +
0–1400 m +
arranged +  and cluster +
headlike +
Wet sandy soil, salt marshes, lake shores, ditches, meadows, wet woods +
20-60-flowered +
0.6 cm6 mm <br />0.006 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
lobed +  and spheric +
pseudoaxillary +  and terminal +
cauline +  and basal +
3 +  and 1 +
green;brown or purplish black +
persistent +
Fruiting early summer–fall. +
parietal +  and axile +
in J. Lamarck et al.,Encycl. +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
not tailed;oblong +
0.4 cm4 mm <br />0.004 m <br /> (?) +
green;brown or purplish black +
persistent +
Illustrated +  and Endemic +
generally longer +
Juncus echinatus +, Juncus scirpoides var. compositus +, Juncus scirpoides var. genuinus +, Juncus scirpoides var. macrostemon +  and Juncus scirpoides var. meridionalis +
Juncus scirpoides +
Juncus subg. Septati +
species +
green +  and straw-colored +
lance-subulate +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (9 cm90 mm <br />0.09 m <br />) +
attached +
not separating +
only proximal;middle +
herb +  and cespitose +