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Taxon  Report  
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.
California Rare Plant Rank: 4.3 (limited distribution).
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
Parent: Aphyllon validum
Genus: Aphyllon
Family: Orobanchaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Ultramafic affinity: 3.4 - strong indicator

Communities: Chaparral

Name Status:
Accepted by JEF + JEF + CNPS
Information about  Aphyllon validum ssp. howellii from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

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Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 05/15/2025).