Juncus subcaudatus

(Engelmann) Coville & S. F. Blake

Proceedings of the Biological Society of Washington 31: 45. 1918.

Endemic
Basionym: Juncus canadensis var. subcaudatus Engelmann Trans. Acad. Sci. St. Louis 2: 474. 1868
Synonyms: Juncus subcaudatus var. planisepalus Fernald
Treatment appears in FNA Volume 22.

Herbs, perennial, cespitose, 1.5–6 dm. Culms erect, 1–3 mm diam., smooth. Cataphylls 0–1, straw-colored, apex acute. Leaves: basal 1, cauline 1–3; auricles 0.5–1 mm, apex rounded, scarious; blade terete, 4.5–15 cm × 1–2 mm. Inflorescences panicles or racemes of 3–35 heads, 2–16 cm, branches widely spreading (at least the proximalmost); primary bract erect; heads 2–10 (–20) -flowered, obconic to nearly spheric, 3–9 mm diam. Flowers: tepals greenish, becoming straw-colored, lanceolate; outer tepals 1.8–3 mm, apex acuminate; inner tepals 2–3.2 mm, apex acuminate; stamens 3, anthers 1/3 filament length. Capsules exserted, straw-colored, imperfectly 3-locular, ovoid to prismatic, 3–3.8 mm, apex acute proximal to beak, valves separating at dehiscence. Seeds ellipsoid, 0.7–1.2 mm, tailed; body covered with whitish translucent veil.


Phenology: Fruiting late summer–fall.
Habitat: Stream banks, lake and pond shores, bogs, and other wet places
Elevation: 0–1000 m

Distribution

V22 504-distribution-map.jpg

Nfld. and Labr. (Nfld.), N.S., Ala., Ark., Conn., Del., D.C., Ga., Ill., Ky., Maine, Md., Mass., Mo., N.J., N.Y., N.C., Ohio, Pa., R.I., Tenn., Va., W.Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Juncus subcaudatus"
persistent +
acute +, acuminate +  and rounded +
scarious +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Ralph E. Brooks* +  and Steven E. Clemants* +
(Engelmann) Coville & S. F. Blake +
Juncus canadensis var. subcaudatus +
4.5 cm45 mm <br />0.045 m <br /> (15 cm150 mm <br />0.15 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
ascending +  and erect +
terete +, involute +  and flat +
straw-colored +
ovoid;prismatic +
0.3 cm3 mm <br />0.003 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
straw-colored +
Nfld. and Labr. (Nfld.) +, N.S. +, Ala. +, Ark. +, Conn. +, Del. +, D.C. +, Ga. +, Ill. +, Ky. +, Maine +, Md. +, Mass. +, Mo. +, N.J. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, Tenn. +, Va. +  and W.Va. +
0–1000 m +
arranged +  and cluster +
headlike +
Stream banks, lake and pond shores, bogs, and other wet places +
2-10(-20)-flowered +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
obconic +  and nearly spheric +
pseudoaxillary +  and terminal +
2 cm20 mm <br />0.02 m <br /> (16 cm160 mm <br />0.16 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
cauline +  and basal +
3 +  and 1 +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
2 cm20 mm <br />0.02 m <br /> (16 cm160 mm <br />0.16 m <br />) +
green;brown or purplish black +
persistent +
Fruiting late summer–fall. +
parietal +  and axile +
Proceedings of the Biological Society of Washington +
2 cm20 mm <br />0.02 m <br /> (16 cm160 mm <br />0.16 m <br />) +
tailed;ellipsoid +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
green;brown or purplish black +
persistent +
generally longer +
Juncus subcaudatus var. planisepalus +
Juncus subcaudatus +
Juncus subg. Septati +
species +
straw-colored +  and greenish +
lanceolate +
whitish translucent +
herb +  and cespitose +