Platanthera dilatata var. dilatata (Pursh) Lindl. ex. Beck
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TAXONOMY
 
Family: Orchidaceae
Genus: Platanthera
 
Species Synonyms: Habenaria dilata (Pursh) Hook.
Limnorchis dilata (Pursh) Rydb.
Platanthera dilatata var. angustifolia Hook.
Common Names: scent-bottle
white bog orchid
tall white orchid
bog-candle
white orchid
 
DISTRIBUTION
 
Canada: Yukon – southwestern Mackenzie District, southwestern Alberta – Saskatchewan – Manitoba – Ontario – Quebec – Labrador – Newfoundland – Nova Scotia
Saskatchewan: widespread except for extreme northern regions; Cypress Hills – Pasquia Hills – Clearwater River
Ecoregion: Cypress Upland, Moist Mixed Grassland, Aspen Parkland, Boreal Transition, Mid-Boreal Upland, Mid-Boreal Lowland, Athabasca Plain, Churchill River Upland
 
HABITAT
 
Saskatchewan: moist woods and bog margins
Canada: meadows, bogs, and wet woods
 
RARITY STATUS
 
Provincial Status According
to Harms (2003):
Vulnerable
Nature Conservancy Status:
G5 S2
Saskatchewan Species at
Risk Status:
None
COSEWIC Status:
None
 
Scent-bottle is apparently secure in Saskatchewan. It is listed as vulnerable because most local populations are small. No immediate threats are known but are possible in the future.
 
SPECIES DESCRIPTION
 
Height: 10 – 50 cm
Roots: in bundles, fleshy or thickened
Stems: erect, leafy
Leaves: on the stem, alternate, few to several, ascending to spreading, 10 – 30 cm long, gradually reduced to bracts below inflorescence, linear to lance-shaped or inversely lance-shaped, tip acute, base sheathing
Inflorescence: unbranched, pedicels very short, lax to dense, cylindrical; bracts appearing shorter than the flowers, lance-shaped, appressed
Flowers: upside down, fragrant, rather showy; sepals and petals white; sepals 3 – 9 mm long, 3-nerved, lateral sepals spreading to reflexed; petals 4 – 8 mm long, ovate to linear, 1- or 2-nerved, margin entire; lip descending, 5 – 10 mm long, base expanded to circular, margin entire; spur thread-like, usually longer than lip; pollen masses enclosed in anther sacs; ovary 5 – 15 mm long, slender to stout
Fruits: capsule ascending
 
PLATANTHERA KEY FOR SPECIES FOUND IN SASKATCHEWAN
 
1 Leaves 1 – 2
2
1 Leaves 3 – several, reduced to bracts upwards
3
   
2 Leaf solitary, ascending, inversely lance-shaped
P. obtusata
2 Leaves 2 in a basal pair, commonly lying on ground, round
P. orbiculata
   
3 Spur club-shaped, shorter than lip; lip yellowish to greenish
P. aquilonis
3 Spur sac-like to club-shaped or thread-like, shorter or longer than lip; lip white
P. dilatata var. dilatata