Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
69. Orchidaceae, the Orchid Family
4. Platanthera Rich.
1. Platanthera hyperborea (L.) Lindl. -- Northern green orchid
Plants 1.5-7 dm tall, glabrous. Leaves lanceolate to oblanceolate, 5-20
cm long, 1-3.5(5) cm wide, acute to rounded or mucronate, reduced in size upward.
Spike elongate, usually dense, 4-20 cm long; bracts lanceolate,
acute to blunt, 6-20 mm long, reduced upward; flowers usually numerous,
erect, greenish, small, not showy; sepals green, 2-4 mm long, the upper
sepal broadly ovate and hoodlike, the lateral sepals lanceolate to ovate and
spreading; petals green to greenish-white, the lateral petals lanceolate,
curved upward, 1.5-2.5 mm long; lip ovate-lanceolate, 4-7 mm long, entire;
spur inconspicuous, curved forward under the lip, about equaling the
lip; ovary cylindric, 6-12 mm long. Mid Jun--Aug. Springs, bogs, fens,
stream margins, seepage areas and fresh wet meadows; occasional from ND and
e MT to n NE and e WY, especially common in the Black Hills; (Labr. and Newf.
to AK, s to RI, PA, IN, IA, NE, NM and OR; also Iceland, Greenl. and e Asia).
Habenaria hyperborea (L.) R.Br.
Previous Section -- Liparis loeselii (L.) Rich.
Return to Family -- Orchidaceae - The
Next Section -- Platanthera praeclara Sheviak
& Bowles -- Western prairie fringed orchid