The Genus Platanthera

Scentbottle, Scent Bottle Orchid, White Bog Orchid: Platanthera dilatata var. dilatata (Synonyms: Habenaria dilatata, Habenaria dilatata var. angustifolia, Habenaria dilatata var. dilatata, Limnorchis dilatata) - Flowers white. Spur thick, not strongly curved and generally about the length of the lower lip.

Long-spurred Bog Orchid, Sierra Bog Orchid, White Bog Orchid: Platanthera dilatata var. leuchostachys (Synonyms: Habenaria dilatata var. leuchostachys, Habenaria leucostachys, Limnorchis graminifolia, Limnorchis leucostachys, Limnorchis leucostachys var. leucostachys, Limnorchis leucostachys var. robusta, Platanthera leucostachys) - Flowers white. Spur very slender, strongly curved and generally at least 150% the length of the lower lip.

Canyon Bog Orchid, Few-flowered Bog Orchid, Sparse-flowered Bog Orchid: Platanthera sparsiflora (Synonyms: Habenaria dilatata, Habenaria dilatata var. laxiflora, Habenaria sparsiflora, Habenaria sparsiflora var. laxiflora, Habenaria sparsiflora var. sparsiflora, Limnorchis sparsiflora, Platanthera sparsiflora var. sparsiflora) - Flowers green. Spur short, thick and pouch-like (like a double sac), usually less than 2/3 the length of the lower lip.

Slender Bog Orchid: Platanthera stricta (Synonyms: Habenaria hyperborea var. viridiflora, Habenaria saccata, Habenaria stricta, Limnorchis saccata, Limnorchis stricta, Limnorchis viridiflora, Platanthera convallariifolia, Platanthera dilatata var. gracilis, Platanthera hyperborea var. viridiflora, Platanthera saccata) - Flowers green. Spur slender and generally shorter than the lower lip.