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Taxon  Report  
Phacelia greenei  J. T. Howell
Scott valley phacelia
Phacelia greenei is an annual herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
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Observation Search
(74 records)
yellowone or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Phacelia
Family: Hydrophyllaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Ultramafic affinity: 6 - strict endemic

Communities: Closed-cone Pine Forest, Yellow Pine Forest, Subalpine Forest

Name Status:
Accepted by JEF + CNPS + PLANTS

Information about  Phacelia greenei from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora


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[wikipedia] Range, Habitat, Description: Phacelia greenei is a species of phacelia known by the common name Scott Valley phacelia. It is endemic to the southern Klamath Mountains of far northern California, where it is known only from Scott Valley, a valley known for its alfalfa growing, and vicinity. It is a serpentine soils endemic growing in the coniferous forests of the mountains. This is an annual herb with a branching or unbranched erect stem reaching no more than about 15 centimeters in height. It is glandular and coated in short hairs called trichomes. The lance-shaped, smooth-edged leaves are up to 3 centimeters in length. The hairy inflorescence is a small, one-sided curving or coiling cyme of five-lobed flowers. Each flower is about half a centimeter long and deep purple or blue in color with a white or yellowish tubular throat. The leaves of the plant are alternate in pattern and are long and narrow.[1] The herb begins blooming in April and stops blooming in June.[2] (contributed by Mary Ann Machi)

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/01/2023).