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Key to Habenaria

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1 Lip and lateral petals toothed; lip hastate auriculate
1 Lip or lateral petals divided into linear segments; lip strongly 3-lobed.
..2 Spur 0.4-1.7 cm long.
....3 Leaves essentially basal, broadly elliptic, 6-15 cm long × 2-5 cm wide (ca. 3× as long as wide), rapidly reduced upwards (with a few, much smaller leaves on the stem); [terrestrial, though in moist habitats]
....3 Leaves cauline, scattered along the stem, lanceolate, 3-25 cm long × 1-4.5 cm wide (the larger > 4× as long as wide), gradually reduced upwards; [aquatic or semi-aquatic in marshes and swamps]
..2 Spur 5-25 cm long.
......4 Lateral petals with distal division 20-24 mm long, > 2× as long as the proximal division (8-11 mm long); spur usually > 10 cm long (but some populations with shorter spurs); [of rich, mesic hardwood hammocks]
......4 Lateral petals with distal division 10-18 mm long, < 2× as long as the proximal division (6-9 mm long); spur usually < 10 cm long (but some populations with longer spurs); [of pinelands and open to semi-open, disturbed areas]
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