Calflora, a 501c3 non-profit
Distribution by County   13448    
Aphyllon validum  Jeps.  ssp. howellii  Heckard & L. T. Collins
Howell's broomrape
Aphyllon validum ssp. howellii is a perennial herb (parasitic) that is native to California, and endemic (limited) to California.
Record Count by County

Glenn: 1 Napa: 1 Tehama: 1
Lake: 3 Sonoma: 1

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2022. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: 12/02/2022).