Spiranthes vernalis Engelm. & A.Gray
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Orchidaceae
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Scientific Name
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Description
Species Description - Plants 2–8 dm; basal lvs narrow, 5–25 cm × 4–12 mm; cauline sheaths usually 5–7, the lower with blades to 15 cm; infl 3–15+ cm, its axis densely beset with pointed hairs 0.2–0.3 mm, the fls mostly in a single long spiral (seldom more condensed), spreading or somewhat deflexed, urceolate-cylindric, white or ivory with the lip more yellowish centrally; sep and lateral pet 5–9.5 mm, the upper sep a bit longer than the spreading-divergent lateral ones; lip 5–8 mm, ovate or broadly ovate, basally cuneate, distally ± obtuse and crisped-erose, papillate on both sides especially distally, its basal callosities 0.5–1 mm, higher than thick; 2n=30. Open, sandy, moist or dry acid soil; Mass. to Fla., w. to O., se. S.D., Kans., and Tex.; Mex. and C. Amer. June–Aug.
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Common Names
spring ladies'-tresses