This section is from the book "Field Book Of Western Wild Flowers", by Margaret Armstrong. Also available from Amazon: Field Book Of Western Wild Flowers.
This forms pretty clumps of bright color, with several stems about eight inches tall, smooth below, and smooth dark green leaves. The flowers are less than half an inch long, with a downy calyx and bright purplish-blue corolla, with a purplish throat. This grows in mountain canyons.

Penstemon P. Rattani var. minor.
 
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