Spiranthes brevilabris

Lindley

Gen. Sp. Orchid. Pl., 471. 1840.

Endemic
Synonyms: Spiranthes gracilis var. brevilabris (Lindley) Correll
Treatment appears in FNA Volume 26. Mentioned on page 535.

Plants 7–40 cm. Roots few, spreading to descending, mostly to 0.5 cm diam., slender. Leaves usually persisting through anthesis, 3–5, basal, spreading, oval-oblanceolate, 2–6 × 1–2 cm. Inflorescences: spikes secund to loosely spiraled, 8–10 flowers per cycle of spiral; rachis densely pubescent, some trichomes capitate to clavate, glands obviously stalked. Flowers cream to pale-yellow; sepals distinct to base, 5 × 1 mm; lateral sepals appressed; petals linear to lance-oblong, 5 × 1 mm, apex acute to obtuse; lip yellow centrally, ovate to oblong, 5 × 2.5 mm, apex dilated, yellow, pubescent, apical margin crisped, finely lacerate; veins several, branches very short; basal calli long-pointed, mostly to 1 mm; viscidium linearlanceolate; ovary mostly 3 mm. Seeds monoembryonic.


Phenology: Flowering Feb–Apr.
Habitat: Dry to moist roadsides and fields
Elevation: 0–100 m

Distribution

V26 1086-distribution-map.jpg

Ala., Fla., Ga., La., Miss., Tex.

Discussion

Spiranthes brevilabris and S. floridana are often and easily confused, although the degree of pubescence is an excellent diagnostic tool in the field.

This species has dramatically declined, with only a single extant population known in 1998–2000.

Selected References

None.

Lower Taxa

None.
... more about "Spiranthes brevilabris"
self-pollination +
dilated +, acute +  and obtuse +
lacerate +  and crisped +
Charles J. Sheviak +  and Paul Martin Brown +
Lindley +
long-pointed +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
flattened +, triangular +  and cylindric +
cylindric +
Ala. +, Fla. +, Ga. +, La. +, Miss. +  and Tex. +
0–100 m +
3-merous +, sessile +  and pedicellate +
cream +  and pale-yellow +
recurved +  and resupinate +
pubescent +  and glabrous +
Dry to moist roadsides and fields +
lateral +  and terminal +
petiolate +, sessile +  and simple +
duplicate +, convolute +, whorled +, opposite +, distichous +  and alternate +
persisting +
2 cm20 mm <br />0.02 m <br /> (?) +  and 6 cm60 mm <br />0.06 m <br /> (?) +
cauline +  and basal +
oval-oblanceolate +
reduced +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
5 cm50 mm <br />0.05 m <br /> (?) +
ovate +  and oblong +
larger +
membranaceous +  and fleshy to somewhat +
2.5 cm25 mm <br />0.025 m <br /> (?) +
differing in form and color +
cylindric +
3 cm30 mm <br />0.03 m <br /> (?) +
1-many-flowered +  and cymose +
pendent +  and erect +
linear;lance-oblong +
1 cm10 mm <br />0.01 m <br /> (?) +
Flowering Feb–Apr. +
Gen. Sp. Orchid. Pl., +
0 cm0 mm <br />0 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
aerial +  and subterranean +
spreading +  and descending +
slender +
monoembryonic +
minute +
distinct +
5 cm50 mm <br />0.05 m <br /> (?) +
foliaceous +
not +  and alike +
1 cm10 mm <br />0.01 m <br /> (?) +
branched +, or +  and simple +
pendent +  and erect +
proliferous +
thickened +  and stout +
concave +  and convex +
Spiranthes gracilis var. brevilabris +
Spiranthes brevilabris +
Spiranthes +
species +
capitate +  and clavate +
aquatic +, lithophytic +, terrestrial +  and epiphytic +
saprophytic +, photosynthetic +  and mycotrophic +