Aphyllon purpureum

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Orobanche uniflora Photo Credit Rod Gilbert

Orobanche uniflora is a flowering plant in the Orobanchaceae family. Also called naked broomrape, one flowered broomrape, or cancer root, O. uniflora is a parasitic plant.

Synonyms:Aphyllon uniflorum, Orobanche uniflora var. typica, Orobanche uniflora var. terrae-novae, Orobanche uniflora var. sedii, Orobanche uniflora var. purpurea, Orobanche uniflora var. occidentalis, Orobanche terrae-novae, Orobanche sedii, Orobanche purpurea, Orobanche porphyrantha, Thalesia uniflora, Orobanche uniflora var. minuta, Orobanche uniflora ssp. occidentalis, Orobanche uniflora var. sedi

Source: http://www.calflora.org/cgi-bin/species_query.cgi?where-taxon=Orobanche+uniflora


  • Kingdom Plantae – Plants
  • Subkingdom -Tracheobionta – Vascular plants
  • Superdivision - Spermatophyta – Seed plants
  • Division - Magnoliophyta – Flowering plants
  • Class - Magnoliopsida – Dicotyledons
  • Subclass - Asteridae
  • Order - Scrophulariales
  • Family - Orobanchaceae – Broom-rape family
  • Genus - Orobanche – broomrape
  • Species - O. uniflora


O. uniflora is a short, annual, parasitic herb that is glandular hairy. It is somewhat fleshy. The stems of this plant are short (1 - 5 cm) compared to the pedicles, which are 3 - 10 cm long. The herb has no leaves or bracts. Flowers 1 - 3, on long pedicles. Calyx 5 -12 mm, with brown to purple corolla that measures 15 - 35 mm. Flower two lipped, with five finely fringed lobes.


Bloom Period

April to August http://biology.burke.washington.edu/herbarium/imagecollection.php


Present in every contiguous state in the United States, plus Alaska and much of Canada.

Source: http://plants.usda.gov/java/profile?symbol=ORUN


Moist open sites, or open woods. Low to middle elevations.



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The Seeds

Orobanche uniflora Photo credit Lisa Hintz