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
- 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.
Present in every contiguous state in the United States, plus Alaska and much of Canada.
Moist open sites, or open woods. Low to middle elevations.
Seed sample from 2011
Average Measurement: 0.2 x 0.1 x 0.1
Measurement Range: L: 0.1 – 0.3, W: 0.1 – 0.2, D: 0.1 – 0.2
Longitudinal Cross Section: elliptical
Shape: Seed very small, slightly narrower at hilum and opposite apex. Seed generally egg shaped, some specimens more slender than others.
Color: Most seeds brown, some tan.
Surface: Seed coat deeply honeycombed, and somewhat iridescent.
Basic Explanations and Assumptions:
The dimensions for the seeds are length x width x depth. The location of the hilum is used as the base of the seed, and the length is measured from hilum to the opposite apex. Where a style is present, the length is measured from the hilum to the bottom of the style. Width is measured at a right angle to the length at the widest part. Depth is measured at a right angle to the intersection of height and width lines.
Measurements included are the mean average for each measurement of ten separate seeds.
All measurements in millimeters unless otherwise noted.