Juncus gymnocarpus

Coville

Memoirs of the Torrey Botanical Club 5: 106. 1894.

Common names: Pennsylvania rush
Endemic
Basionym: Juncus smithii Engelmann Trans. Acad. Sci. St. Louis 2: 444. 1866,
Treatment appears in FNA Volume 22.

Herbs, perennial, 5–10 dm. Rhizomes widely creeping, 2–4 mm diam. Culms terete, 1.5–2.5 mm diam. Cataphylls several. Leaves: blade absent. Inflorescences 8–30 (–50) -flowered, open, 1.5–4 cm; primary bract terete, 1–2.5 dm, much longer than inflorescence. Flowers pedicellate; bracteoles broadly ovate; tepals light-brown, ovatelanceolate, 1.8–2.5 mm, apex acuminate; inner series shorter, margins scarious, apex acute; stamens 6, filaments 1–1.3 mm, anthers 0.5–0.7 mm; style 0.5 mm. Capsules reddish tan to brown, lustrous, 3-locular, widely ellipsoid, 2–3 × 1.8–2.2 mm, exceeding perianth. Seeds dark amber, obovoid, 0.7–1 mm, not tailed.


Phenology: Flowering and fruiting summer.
Habitat: Sphagnous swamps, low woods, edges of lakes
Elevation: 600–1500 m

Distribution

V22 197-distribution-map.jpg

Ala., Fla., Miss., N.C., Pa., S.C., Tenn.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Juncus gymnocarpus"
persistent +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
acute +  and acuminate +
Ralph E. Brooks* +  and Steven E. Clemants* +
Coville +
Juncus smithii +
channeled;terete +
reddish tan +  and brown +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
ellipsoid +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
Pennsylvania rush +
1.5mm;2.5mm +
Ala. +, Fla. +, Miss. +, N.C. +, Pa. +, S.C. +  and Tenn. +
600–1500 m +
0.1 cm1 mm <br />0.001 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
arranged +  and cluster +
headlike +
Sphagnous swamps, low woods, edges of lakes +
open +  and 8-30(-50)-flowered +
pseudoaxillary +  and terminal +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
3 +  and 1 +
green;brown or purplish black +
persistent +
Flowering and fruiting summer. +
parietal +  and axile +
Memoirs of the Torrey Botanical Club +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
dark amber +
not tailed;obovoid +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
green;brown or purplish black +
persistent +
generally longer +
0.5 cm5 mm <br />0.005 m <br /> (?) +
Juncus sect. Genuini +, Juncus sect. Juncotypus +  and Juncus subg. Juncotypus +
Juncus gymnocarpus +
Juncus subg. Genuini +
species +
light-brown +
ovatelanceolate +
0.18 cm1.8 mm <br />0.0018 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +