Juncus secundus

P.. Beauvois ex Poiret in J. Lamarck et al.

in J. Lamarck et al.,Encyclopedie Methodique. Botanique... Supplement 3: 160. 1813.

Endemic
Treatment appears in FNA Volume 22.

Herbs, short-lived perennial, cespitose, 1.5–7 dm. Culms 1–30. Leaves basal, (1–) 2–3; auricles 0.2–0.4 (–0.6) mm, scarious; blade flat, 10–30 cm × 0.5–1 mm, margins entire. Inflorescences 5–15 (–30) -flowered, usually somewhat loose, 1–5 cm; primary bract usually shorter than inflorescence. Flowers: chiefly along inner side of branches; bracteoles 2; tepals greenish, lanceolate, 3.3–4.4 mm; outer and inner series equal, apex acuminate; stamens 6, filaments 0.5–0.9 mm, anthers 0.4–0.8 mm; style 0.1–0.2 mm. Capsules tan or light-brown, 3-locular, ellipsoid, (3.3–) 3.8–4.7 mm, nearly equal to tepals. Seeds tan, ellipsoid to lunate, 0.5–0.6 (–0.7) mm, not tailed. 2n = ca. 80.


Phenology: Flowering and fruiting spring.
Habitat: Exposed sites, usually with well-drained sandy soil, often associated with shallow bedrock

Distribution

V22 69-distribution-map.jpg

N.S., Ont., Ala., Ark., Conn., Del., Ga., Ill., Ind., Ky., La., Maine, Md., Mass., Mo., N.H., N.J., N.Y., N.C., Ohio, Okla., Pa., R.I., Tenn., Vt., Va., W.Va.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Juncus secundus"
persistent +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
acuminate +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
Ralph E. Brooks* +  and Steven E. Clemants* +
P.. Beauvois ex Poiret in J. Lamarck et al. +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
channeled;terete +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
ascending +  and erect +
terete +, involute +  and flat +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.38 cm3.8 mm <br />0.0038 m <br />) +
light-brown +  and tan +
ellipsoid +
0.38 cm3.8 mm <br />0.0038 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
flattened +  and round +
N.S. +, Ont. +, Ala. +, Ark. +, Conn. +, Del. +, Ga. +, Ill. +, Ind. +, Ky. +, La. +, Maine +, Md. +, Mass. +, Mo. +, N.H. +, N.J. +, N.Y. +, N.C. +, Ohio +, Okla. +, Pa. +, R.I. +, Tenn. +, Vt. +, Va. +  and W.Va. +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
arranged +  and cluster +
headlike +
Exposed sites, usually with well-drained sandy soil, often associated with shallow bedrock +
5-15(-30)-flowered +
pseudoaxillary +  and terminal +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
3 +  and 1 +
green;brown or purplish black +
persistent +
Flowering and fruiting spring. +
parietal +  and axile +
in J. Lamarck et al.,Encyclopedie Methodique. Botanique... Supplement +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
not tailed;ellipsoid;lunate +
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 +
0.01 cm0.1 mm <br />1.0e-4 m <br /> (?) +  and 0.02 cm0.2 mm <br />2.0e-4 m <br /> (?) +
Juncus sect. Poiophylli +, Juncus subg. Pseudo-tenageia +, Juncus sect. Tenageia +  and Juncus subg. Tenageia +
Juncus secundus +
Juncus subg. Poiophylli +
species +
lanceolate +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.44 cm4.4 mm <br />0.0044 m <br />) +
perennial +  and short-lived +
herb +  and cespitose +