This section is from the book "Wild Flowers Of The North American Mountains", by Julia W. Henshaw. Also available from Amazon: Wild Flowers of the North American Mountains.
Stems: scapes broadly winged. Leaves: much shorter than the scapes, bracts of the spathe more or less unequal, the longer about equalling the pedicels. Flowers: bright yellow, segments of the perianth obtuse or acutish, style cleft to below the middle. Fruit: capsule obovate-oblong.
This plant has a name which is rather an anomaly. The tall, broadly-winged scapes are two-edged, and have a solitary, sessile spathe, while the leaves are shortish and narrow. The bright yellow flowers are extremely attractive.
 
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