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Orbiculata: Answers
to key questions in Lilies, Irises & Orchids of Saskatchewan by
Vernon L. Harms and Anna L. Leighton leading to this species. The
answers are in the order you would normally work through the key.
 | Leaves
1-2, basal; scape bractless or with 1-6 bracts; NOT [Leaves 3
or more, cauline, gradually reduced to bracts upwards] |
| Leaves 2
in a basal pair, wide-spreading and typically lying flat on the ground,
broadly elliptic to orbicular; bracts 1 (6); flowers larger, lip usually
over 10 mm (up to 17 mm) long; lip pendent, linear to linear-oblong;
spur not tapered toward tip, 14-27 mm long, usually longer than lip; NOT
[Leaf 1 (or rarely 2 with these not paired), spreading-ascending,
oblanceolate, elliptic to obovate; bracts none (rarely 1); flowers
smaller, lip to 8 (10) mm long, bent abruptly downward, linear to
lanceolate; spur distinctly tapered toward the tip, 3-8 mm long, roughly
equal to lip]
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Platanthera: Answers
to key questions in Lilies, Irises & Orchids of Saskatchewan by
Vernon L. Harms and Anna L. Leighton leading to this genus. The answers
are in the order you would normally work through the key.
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Plants
green, with at least some green leaf-blades, these sometimes early
withering or late developing; flowering stems green (pale pink to
purplish-red in Calypso bulbosa), bearing sheathing bracts in
some species; rootstocks not coral-like; capsules spreading to erect
(occasionally drooping when old); NOT [Plants non-green saprophytes
lacking leaf-blades; flowering stems yellowish to purplish-red or brown
(pale greenish-yellow in C. trifid), bearing sheathing bracts;
rhizomes rootless, coral-like in their branching; capsules drooping] |
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Flowers 3
or more in a spike-like inflorescence, small, often inconspicuous; lip
usually less than 1 cm long, but if longer, neither inflated nor broad
and flat; NOT [Flowers 1 to 2 per stalk (occasionally more in Cypripedium
reginae and C. montanum), large, showy; lip 1 cm long or
longer, either inflated or broad and flat] |
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Lip
spurred (spur short and bag-like in Coeloglossum viride);
NOT [Lip not spurred] |
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Lip
yellowish-green (often tinged with red in Coeloglossum) or
white, unmarked, narrower, tongue- or strap-shaped, lacking
lateral lobes; flower stems leafy (except in Platanthera
obtusata which has a single leaf at base of stem, and Platanthera
orbiculata, which has two leaves, both basal) arising from clusters
of thick roots; NOT [Lip white with roseate spots, ovate in outline with
a pair of protruding lateral lobes near base; terminal lobe flared and
usually notched; flower stems naked with a single leaf present at base
of stalk and arising from rhizomes with slender roots] |
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Lip not
toothed at tip, about the same length as spur; stems leafy or leafless;
floral bracts shorter; flowers greenish, greenish-white, or white;
clusters of roots not palmately arranged; NOT [Lip 2 (3)-toothed at tip,
much longer than the inconspicuous pouch-like spur; stems with up to 5
leaves; floral bracts prominent throughout inflorescence, elongated to
2-4 times flower length on raceme lower portions; flowers greenish to
yellowish-green; clusters of roots palmately-arranged] |
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