Romanzoffiana: Answers to key questions in Lilies, Irises & Orchids of Saskatchewan by Vernon L. Harms and Anna L. Leighton leading to this species. The answers are in the order you would normally work through the key.

Flowers in 2-3 ranks tightly spiraled around rachis; sepals and petals (5) 6-10 (12) mm long; lateral sepals upturned and part of the upward-arching hood formed by lateral petals and dorsal sepal; lip (5) 8-10 mm long, fiddle-shaped, i.e. constricted above the middle and with a rounded tip; ovary (2) 5-7 mm long; leaves linear, progressively reduced upward into leaf-like bracts, present at anthesis.; NOT [Flowers in a single rank loosely spiraled (0) 3 (5) times around rachis; sepals and petals to 5 mm long; lateral sepals clearly separate from hood; lip to 5 mm long, ovate to oblong with a central green-yellow spot; ovary about 3 mm long; leaves elliptic to ovate, basal, often absent at anthesis.]

Spiranthes: Answers to key questions in Lilies, Irises & Orchids of Saskatchewan by Vernon L. Harms and Anna L. Leighton leading to this genus. The answers are in the order you would normally work through the key. 

	Plants green, with at least some green leaf-blades, these sometimes early withering or late developing; flowering stems green (pale pink to purplish-red in Calypso bulbosa), bearing sheathing bracts in some species; rootstocks not coral-like; capsules spreading to erect (occasionally drooping when old); NOT [Plants non-green saprophytes lacking leaf-blades; flowering stems yellowish to purplish-red or brown (pale greenish-yellow in C. trifid), bearing sheathing bracts; rhizomes rootless, coral-like in their branching; capsules drooping]
	Flowers 3 or more in a spike-like inflorescence, small, often inconspicuous; lip usually less than 1 cm long, but if longer, neither inflated nor broad and flat; NOT [Flowers 1 to 2 per stalk (occasionally more in Cypripedium reginae and C. montanum), large, showy; lip 1 cm long or longer, either inflated or broad and flat]
	Lip not spurred; NOT [Lip spurred (spur short and bag-like in Coeloglossum viride)]
	Leaves solitary or several, but not paired; NOT [Leaves 2, paired either at base of stem or attached midway up stem]
	Flowers larger, lateral petals and sepals 3 mm long or longer; small bracts present on stem above leaves; stems arising from fleshy roots or creeping rhizomes; NOT [Flowers minute, lateral petals and sepals 2.5 mm long at most; bracts absent on stem above leaves; stems arising from pseudobulbs]
	Leaves basal or attached to lower stem, thin, not evergreen, uniformly green; lip base not inflated, lip tip broad and rounded; flowers not conspicuously glandular-pubescent; plants arising from clusters of thin to thick roots; NOT [Leaves all basal, thickish, evergreen, with midribs and veins often dark-lined or white-reticulated; lip base inflated into a sac; lip tip narrow and tapering; flowers conspicuously glandular pubescent; plants arising from creeping rhizomes with slender roots]

Orchidaceae: Answers to key questions in Budd's Flora leading to this family. 

	plants NOT aquatic
	flowers irregular; NOT [flowers regular]
	perianth present, conspicuous, in two series of 3 segments, often brightly colored; NOT [perianth absent or inconspicuous]
	perianth usually large, consisting of sepals and petals usually alike, variously colored; NOT [perianth small, consisting of 3 green sepals and 3 whitish petals]
	petals NOT deciduous
	stamens 1 or 2; NOT [stamens 3 or 6]