The Genus Platanthera

1. Dilated Bog Orchid: Platanthera dilatata var. dilatata (formerly Habenaria dilatata var. dilatata) - Flowers white. Spur about as long as lower lip and fairly thick.

2. White Bog Orchid: Platanthera leucostachys (formerly Habenaria dilatata var. leucostachys) - Flowers white. Spur longer than lower lip and very thin.

3. Slender Bog Orchid: Platanthera stricta (formerly Habenaria saccata)- Flowers greeen. Spur shorter than lower lip and sac-like.