HABIT: Herbaceous perennial to 6 dm.; flowering mid
SIMILAR SPECIES: All members of the genus Spiranthes
in Ohio are similar and are distinguished by floral characters. S.
magnicamporum is most similar to S. cernua and is best distinguished
from it by the absence of leaves during anthesis, its thick, tuberous roots,
and the shape of the lip. It blooms rather later than other Ohio Spiranthes.
TOTAL RANGE: S. Ont., OH, IN, IL, IA, MN, ND, SD,
NE, MO, KS, OK, TX; and local in UT, CO, NM, LA, and AL.
STATE RANGE: There are post-1960 records from Adams, Erie,
Ottawa, Seneca, Summit, and Wood counties; however, the population from Seneca
County is no longer extant. There are pre-1960 records from Clark, Franklin,
Lucas, and Ross counties.
STATE STATUS: 1980-1987: Threatened, 1988 to present:
HABITAT: Primarily calcareous soils in grassy fields, dry
prairies, and limestone quarry floors.
HAZARDS: Trampling and compaction of soil; overshading by
woody species as a result of succession.
RECOVERY POTENTIAL: Unknown, but tolerant of moderate
INVENTORY GUIDELINES: Collect complete flowering material
with underground parts; avoid over-collecting.
COMMENTS: This taxon has been recently segregated from the Spiranthes
cernua complex (Sheviak, 1973) and all old records should be checked for proper
identification. This species is probably more frequent in western Ohio than the
records indicate. It may have been overlooked due to its late blooming period.
Argus, G.W. and D.J. White. 1982. Atlas of the rare
vascular plants of Ontario: Part 1. National Museums of Canada, Ottawa, Canada.
Case, F.W., Jr. and P.M. Catling. 1983. The genus Spiranthes
in Michigan. Mich. Bot. 22: 79-92.
M.A. 1993. Orchids of Indiana. Indiana Univ. Press, Bloomington. 275 pp.
Luer, C.A. 1975. The native orchids of the United States and
Canada excluding Florida. New York Botanical Garden, New York, NY. 361 p.
Sheviak, C.J. 1973. A new Spiranthes from the
grasslands of central America. Bot. Mus. Leafl. 23: 285-297.
Sheviak, C.J. 1974. An introduction to the ecology of the
Illinois Orchidaceae. Illinois State Museum, Springfield, IL. 90 p.
Ohio Department of Natural Resources
Division of Natural Areas and Preserves
Created: 11/1983 Barbara K. Andreas
Database Code: SPGY.V12