Stanleya pinnata (Pursh) Britton var. pinnata

Prince's Plume
Brassicaceae (Mustard Family)


 

Prince's plume is a tall, glabrous, suffrutescent perennial that grows in sandy washes and on desert slopes and seleniferous soils, from 1000' to 7500' (mostly at the lower elevations), in creosote bush scrub to pinyon-juniper woodland from the Conejo Valley to the West Transverse Range, Santa Rosa Mountains, and the Mojave Desert.  It reaches 5' in height.  The basal and lower cauline leaves are lanceolate in outline, deeply pinnately lobed into lanceolate segments, and from 2" to 8" long, while the upper leaves are shorter, 2" or so long, and entire-margined to few-lobed.  The flowers are in dense elongated racemes to 24" long, and each flower has four sepals spreading to reflexed, and four yellow petals, clawed at the base and having long, wavy hairs on the inner side.  The stamens are longer than the petals and pilose at the base.  The fruits are stalked linear siliques to 3" long, arcuate to almost straight, and spreading to ± downcurved, containing seeds which are brown and oblong.  Prince's plume blooms mostly from April to September.  This taxon now includes what used to be Stanleya pinnata var. inyoensis. These two pictures were taken in the East Mojave National Reserve.

Click here for Latin name derivations: 1) Stanleya 2) pinnata.
Pronunciation: STAN-lee-a pin-AY-ta.
Click here for Botanical Term Meanings.

 




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