Juncus validus

Coville

Bulletin of the Torrey Botanical Club 22:305. 1895.

Endemic
Basionym: Juncus crassifolius Buchenau Bot. Jahrb. Syst. 12: 326. 1890,
Treatment appears in FNA Volume 22.
Revision as of 23:54, 29 July 2020 by imported>Volume Importer
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Herbs, perennial, rhizomatous, sometimes to nearly cespitose, 4–10 dm. Rhizomes not tuberous, 2 mm diam. Culms erect, terete, 3–5 mm diam., smooth. Cataphylls 0. Leaves: basal 2–3 (–6), cauline 1–4; auricles 1–3 mm, apex acute, membranaceous, absent on proximal leaves; blade green, laterally compressed, 9–70 cm × 2–6 mm. Inflorescences terminal panicles of 10–30 heads, 10–30 cm, branches spreading; primary bract erect; heads 20–30-flowered, spheric, (10–) 12–15 mm diam. Flowers: tepals green to reddish, lance-subulate, 4–5 mm, apex acuminate; stamens 3, anthers 1/3–1/2 filament length. Capsules exserted, straw-colored, 1-locular, subulate, 4–5,5 mm, tapering to subulate tip, valves separating or not at dehiscence; fertile throughout or only proximal to middle.. Seeds broadly ellipsoid, 0.5–0.6 mm, not tailed; body clear yellowbrown.

Distribution

V22 288-distribution-map.jpg

Ala., Ark., Fla., Ga., Kans., La., Miss., Mo., N.C., Okla., S.C., Tenn., Tex., Va.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Inflorescence 10–30 cm; heads 20–30-flowered; capsule fully separating at apex after dehiscence Juncus validus var. validus
1 Inflorescence 2–5 cm; heads 6–15-flowered; capsule remaining united at apex after dehiscence Juncus validus var. fascinatus
... more about "Juncus validus"
persistent +
acuminate +  and acute +
membranaceous +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Ralph E. Brooks* +  and Steven E. Clemants* +
Coville +
Juncus crassifolius +
9 cm90 mm <br />0.09 m <br /> (70 cm700 mm <br />0.7 m <br />) +
compressed +
0.2 cm2 mm <br />0.002 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
clear yellowbrown +
ascending +  and erect +
terete +, involute +  and flat +
straw-colored +
tapering;subulate +
5 cm50 mm <br />0.05 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
Ala. +, Ark. +, Fla. +, Ga. +, Kans. +, La. +, Miss. +, Mo. +, N.C. +, Okla. +, S.C. +, Tenn. +, Tex. +  and Va. +
arranged +  and cluster +
headlike +
20-30-flowered +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
spheric +
pseudoaxillary +  and terminal +
cauline +  and basal +
3 +  and 1 +
green;brown or purplish black +
persistent +
parietal +  and axile +
Bulletin of the Torrey Botanical Club +
2 cm20 mm <br />0.02 m <br /> (?) +
not tailed;ellipsoid +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
green;brown or purplish black +
persistent +
generally longer +
Juncus sect. Septati +
Juncus validus +
Juncus subg. Septati +
species +
green +  and reddish +
lance-subulate +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
not +  and separating +
only proximal;middle +
herb +  and cespitose +