Camissonia claviformis ssp. peirsonii (Peirson’s evening-primrose)

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Camissonia claviformis (Torr. & Frém.) P.H. Raven ssp. peirsonii (Munz) P.H. Raven

Peirson’s evening-primrose, Peirson’s browneyes

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Oenothera claviformis Torr. & Frém. ssp. peirsonii (Munz) P.H. Raven
Oenothera claviformis Torr. & Frém. var. peirsonii Munz

2/28/2010 · Anza-Borrego Desert State Park, California · ≈ 7 × 4½″ (17 × 11 cm)

Kingdom	Plantae	Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin)
Subkingdom	Tracheobionta	Vascular plants—plants with a “circulatory system” for delivering water and nutrients
Division	Magnoliophyta	Flowering plants, also known as angiosperms
Class	Magnoliopsida	Dicotyledons—plants with two initial seed leaves
Subclass	Rosidae	Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
Order	Myrtales	Includes myrtles, leadwoods, loosestrifes, pomegranates, evening primroses, many others
Family	Onagraceae	Willowherb/evening primrose family
Genus	Camissonia	Named for Ludolf Karl Adelbert von Chamisso (1781-1838), who was a botanist on the ship Rurik which visited California in 1816, and who named the California poppy for his friend Dr. Johann Friedrich Gustav von Eschscholtz
Species	claviformis	From the Latin for “club-shaped,” with reference to the capsules
ssp.	peirsonii	After Frank Warrington Peirson (1865-1951), a California collector who who worked mostly in the San Gabriel Mountains and Inyo County with his half-sister Mable Burnham Peirson, a high school biology teacher

Range:

Camissonia claviformis ssp. peirsonii description by Thomas H. Kent, not updated.