Platanthera species

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Scientific Name Platanthera aquilonis USDA PLANTS Symbol
PLAQ2
Common Name Green Bog Orchid, Northern Green Orchid ITIS Taxonomic Serial No.
894660
Family Orchidaceae (Orchid) SEINet
Reference
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Description Life zones and habitat: Montane to alpine. Wet, boggy areas.
Plant: Erect, single-stem perennial, 4 to 24 inches tall.
Leaves: Three to 5 alternate stalkless leaves 1 to 9 inches long, oblong to lanceolate, gradually becoming bracts higher up on the stem.
Inflorescence: A raceme of 30 to 40 stalkless green/yellow-green flowers about 1/2-inch across with an erect bract beneath; 3 sepals and 3 petals, upper two petals joining with a sepal to form a hood; lower petal forming a lip projecting forward with cylindrical, club-shaped spur from base, shorter than the lip.
References: Descr. adapted from SEINet, and North American Native Orchid Journal, Vol 13.
Colorado Status
Native
Scientific Name Platanthera dilatata var. albiflora USDA PLANTS Symbol
PLDIA
Common Name White Bog Orchid, Scentbottle ITIS Taxonomic Serial No.
196400
Family Orchidaceae (Orchid) efloras.org Reference
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Description Life zones and habitat: Montane to alpine. Wet, boggy areas.
Plant: Erect, sturdy perennial, 6 to 60 inches tall, but usually 20 inches tall or less in CO; leafy stem.
Leaves: Two to 5 alternate leaves 2 to 10 inches long; recurved (bending backward), lanceolate to elliptic-lanceolate, gradually becoming linear-lanceolate bracts higher up on the stem.
Inflorescence: A raceme of 10 to 70 bright white, fragrant flowers about 1/2-inch across with 3 sepals and 3 petals (all white), upper two petals joining with a sepal to form a hood; lower petal forms a lip that is broader at the base (“dilated”) than the tip; spur below is significantly shorter than the lip.
References: Descr. adapted from "Guide to Colorado Wildflowers" by G.K. Guennel, University of Wisconsin Botany Dept., and USFS article by Walter Fertig.
Colorado Status
Native
Scientific Name Platanthera dilatata var. dilatata USDA PLANTS Symbol
PLDID
Common Name White Bog Orchid, Scentbottle ITIS Taxonomic Serial No.
196398
Family Orchidaceae (Orchid) efloras.org Reference
Click Here
Description Life zones and habitat: Montane to alpine. Wet, boggy areas.
Plant: Erect, sturdy perennial, 6 to 60 inches tall, but usually 20 inches tall or less in CO; leafy stem.
Leaves: Two to 5 alternate leaves 2 to 10 inches long; recurved (bending backward), lanceolate to elliptic-lanceolate, gradually becoming linear-lanceolate bracts higher up on the stem.
Inflorescence: A raceme of 10 to 70 bright white, fragrant flowers about 1/2-inch across with 3 sepals and 3 petals (all white), upper two petals joining with a sepal to form a hood; lower petal forms a lip that is broader at the base (“dilated”) than the tip; spur below is about the same length or longer than the lip.
References: Descr. adapted from "Guide to Colorado Wildflowers" by G.K. Guennel, University of Wisconsin Botany Dept., and USFS article by Walter Fertig.
Colorado Status
Native
Scientific Name Platanthera obtusata USDA PLANTS Symbol
PLDOB
Common Name Blunt-leaf Orchid ITIS Taxonomic Serial No.
43411
Family Orchidaceae (Orchid) SEINet
Reference
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Description Life zones and habitat: Montane to alpine. Wet, boggy areas, mossy ground; shade to partial sun.
Plant: Erect perennial up to 14 inches tall, but usually 4 to 6 inches tall in CO; leafless stem.
Leaves: One (rarely 2) leaf from base of stem linear-oblanceolate, elliptic, or broadly obovate.
Inflorescence: A lax raceme of 4 to 8 greenish white to yellow-green inverted flowers less than 1/2-inch across with 3 sepals and 3 petals, upper two petals joining with a sepal to form a hood; lower petal forms a narrow lip; slender, conical spur.
References: Descr. adapted from SEINet and North American Native Orchid Journal, Vol 13.
Colorado Status
Native



© Tom Lebsack 2017