Striata: 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.

Sepals and lateral petals purple-striped; lip purplish or purple-striped, generally over 8 mm long, entire or wavy-margined, lacking lateral lobes; NOT [Sepals and lateral petals not purple-striped, but sometimes spotted or suffused with purple; lip white, with or without purple spots, at most 8 (9) mm long, inconspicuously 3-lobed, the lateral lobes short and along sides of base of lip]

Corallorhiza: 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 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; NOT [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)]

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]