Juncus diffusissimus

Buckley

Proceedings of the Academy of Natural Sciences of Philadelphia 14: 9. 1862.

Endemic
Treatment appears in FNA Volume 22.

Herbs, perennial, cespitose, 2.5–6.5 dm. Culms erect, terete, 1–3 mm diam., smooth. Cataphylls 0–1, maroon or dark green, apex obtuse. Leaves: basal 1, cauline 2–3; auricles 1–2.1 mm, apex rounded, membranaceous; blade maroon or dark green, terete to compressed, 3–20 cm × 1–2.4 mm. Inflorescences terminal panicles of 30–70 (–130), 5–20 cm, branches spreading; primary bract erect;; heads (1–) 2–10-flowered, hemispheric or narrower, 5–10 mm diam. Flowers: tepals green to straw-colored, lanceolate, apex acute; outer tepals (2–) 2.6–3.2 mm; inner tepals (1.8–) 2.3–3 mm; stamens 3, anthers 1/2–2/3 filament length. Capsules exserted,, straw-colored, 1-locular, linear-lanceoloid, 4–5.2 mm, apex acute, valves separating at dehiscence. Seeds oblong-ellipsoid, 0.3–0.4 mm, not tailed; body clear yellowbrown.


Phenology: Fruiting summer.
Habitat: In soft mucky substrates, marshy shores, sloughs, occasionally in wet wooded places, often in shallow water, commonly abundantly colonizing wet, sandy- alluvial outwash in ditches and clearings
Elevation: 10–1000 m

Distribution

V22 75-distribution-map.jpg

Introduced; Ala., Ark., Calif., Conn., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Miss., Mo., N.C., Ohio, Okla., S.C., Tenn., Tex., Va., Wash., W.Va., probably, South America

Discussion

Selected References

None.

Lower Taxa

None.

"narrower" is not a number.

... more about "Juncus diffusissimus"
persistent +
acute +, rounded +  and obtuse +
membranaceous +
0.1 cm1 mm <br />0.001 m <br /> (0.21 cm2.1 mm <br />0.0021 m <br />) +
Ralph E. Brooks* +  and Steven E. Clemants* +
Buckley +
dark green +  and maroon +
3 cm30 mm <br />0.03 m <br /> (20 cm200 mm <br />0.2 m <br />) +
terete;compressed +
0.1 cm1 mm <br />0.001 m <br /> (0.24 cm2.4 mm <br />0.0024 m <br />) +
clear yellowbrown +
ascending +  and erect +
terete +, involute +  and flat +
straw-colored +
linear-lanceoloid +
0.4 cm4 mm <br />0.004 m <br /> (0.52 cm5.2 mm <br />0.0052 m <br />) +
dark green +  and maroon +
Ala. +, Ark. +, Calif. +, Conn. +, Fla. +, Ga. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Md. +, Miss. +, Mo. +, N.C. +, Ohio +, Okla. +, S.C. +, Tenn. +, Tex. +, Va. +, Wash. +, W.Va. +, probably +  and South America +
10–1000 m +
arranged +  and cluster +
headlike +
In soft mucky substrates, marshy shores, sloughs, occasionally in wet wooded places, often in shallow water, commonly abundantly colonizing wet, sandy- alluvial outwash in ditches and clearings +
(1-)2-10-flowered +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
2-to-many +
hemispheric +
pseudoaxillary +  and terminal +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.23 cm2.3 mm <br />0.0023 m <br />) +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
cauline +  and basal +
3 +  and 1 +
0.2 cm2 mm <br />0.002 m <br /> (0.26 cm2.6 mm <br />0.0026 m <br />) +
0.26 cm2.6 mm <br />0.0026 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
green;brown or purplish black +
persistent +
Fruiting summer. +
parietal +  and axile +
Proceedings of the Academy of Natural Sciences of Philadelphia +
not tailed;oblong-ellipsoid +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
green;brown or purplish black +
persistent +
generally longer +
Juncus sect. Septati +
Juncus diffusissimus +
Juncus subg. Septati +
species +
green +  and straw-colored +
lanceolate +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
herb +  and cespitose +