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

Peirson’s evening-primrose

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassRosidaeRoses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
OrderMyrtalesIncludes myrtles, leadwoods, loosestrifes, pomegranates, evening primroses, many others
FamilyOnagraceaeWillowherb/evening primrose family
GenusCamissoniaNamed 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
SpeciesclaviformisFrom the Latin for “club-shaped,” with reference to the capsules
ssp.peirsoniiAfter 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

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

Oenothera claviformis Torr. & Frém. var. peirsonii Munz


Camissonia claviformis ssp. peirsonii description by Thomas H. Kent, last updated 25 May 2020.

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Camissonia claviformis (Peirson’s evening-primrose)

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


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