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.
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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 +