Spiranthes ovalis

Lindley

Gen. Sp. Orchid. Pl., 466. 1840.

Endemic
Synonyms: Ibidium ovale (Lindley) House
Treatment appears in FNA Volume 26. Treatment on page 538. Mentioned on page 533.

Plants 5–40 cm. Roots few, slender, spreading to descending, mostly to 0.5 cm diam. Leaves persisting through anthesis, few–several, basal, usually on proximal 1/2 stem, recurved-spreading, oblanceolate, 3–15 × 0.5–1.5 cm. Spikes tightly spiraled, usually 3 flowers per cycle of spiral, rarely loosely spiraled in depauperate plants; rachis pubescent, some trichomes clavate to capitate, glands obviously stalked. Flowers pure white; sepals distinct to base, slightly spreading, 3.5–6.1 × 1–1.5 mm; petals lanceolate, 6 × 1 mm; lip ovate, 5 × 3 mm, apex with finely crisped margin; veins few, branches parallel; basal calli spreading, slender, mostly to 0.75 mm; ovary mostly 3–8 mm. Seeds monoembryonic.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Key

1 Rostellum and viscidium present. Spiranthes ovalis var. ovalis
1 Rostellum and viscidium absent. Spiranthes ovalis var. erostellata
... more about "Spiranthes ovalis"
self-pollination +
obtuse +, acute +  and crisped +
Charles J. Sheviak +  and Paul Martin Brown +
Lindley +
0 cm0 mm <br />0 m <br /> (0.075 cm0.75 mm <br />7.5e-4 m <br />) +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
flattened +, triangular +  and cylindric +
cylindric +
e North America +
3-merous +, sessile +  and pedicellate +
recurved +  and resupinate +
pubescent +  and glabrous +
lateral +  and terminal +
petiolate +, sessile +  and simple +
duplicate +, convolute +, whorled +, opposite +, distichous +  and alternate +
persisting +
3 cm30 mm <br />0.03 m <br /> (?) +  and 15 cm150 mm <br />0.15 m <br /> (?) +
recurved-spreading +
cauline +  and basal +
oblanceolate +
reduced +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
5 cm50 mm <br />0.05 m <br /> (?) +
larger +
membranaceous +  and fleshy to somewhat +
3 cm30 mm <br />0.03 m <br /> (?) +
differing in form and color +
cylindric +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
1-many-flowered +  and cymose +
pendent +  and erect +
lanceolate +
1 cm10 mm <br />0.01 m <br /> (?) +
depauperate +
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 +
foliaceous +
not +  and alike +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
branched +, or +  and simple +
pendent +  and erect +
proliferous +
thickened +  and stout +
concave +  and convex +
Ibidium ovale +
Spiranthes ovalis +
Spiranthes +
species +
clavate to capitate +
aquatic +, lithophytic +, terrestrial +  and epiphytic +
saprophytic +, photosynthetic +  and mycotrophic +