Naked Broomrape, One-flowered Cancer-root

Orobanche uniflora

Family: Orobanchaceae
Genus: Orobanche (or-oh-BAN-kee) (Info)
Species: uniflora (yoo-nee-FLOR-uh) (Info)


Parasites and Hemiparasites

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us


under 6 in. (15 cm)


Unknown - Tell us


Unknown - Tell us

Sun Exposure:

Full Sun

Sun to Partial Shade

Light Shade

Partial to Full Shade

Full Shade


Unknown - Tell us

Bloom Color:

Pale Yellow

Bright Yellow

Light Blue



White/Near White

Bloom Time:

Late Winter/Early Spring

Mid Spring

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Mid Fall

Late Fall/Early Winter


Unknown - Tell us

Other details:

This plant may be considered a protected species; check before digging or gathering seeds

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

Unknown - Tell us

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Allow seedheads to dry on plants; remove and collect seeds


This plant has been said to grow in the following regions:

Deer, Arkansas

Roslindale, Massachusetts

Erie, Michigan

Gardeners' Notes:


On Feb 28, 2014, coriaceous from ROSLINDALE, MA wrote:

This native wildflower volunteers in the sunny front yard of a neighbor of mine, where his lawn meets a border filled mostly with hosta and volunteering goldenrod. There it blooms only for a couple of weeks in late spring. The flowers are lavender here. It has no visible leaves.

This parasitic species has a wide host range, including goldenrod and Helianthus. My neighbor's goldenrod appears healthy. No stonecrop or Heuchera are present.

Native to North America, this species has been found in every continental state and most of Canada. It is most commonly a woodland species, and generally absent from the Great Plains. Despite its wide geographic range, its distribution is spotty, and it is often locally rare, and in some states endangered.

It is... read more


On Sep 25, 2006, Magpye from NW Qtr, AR (Zone 6a) wrote:

Stems -
Parasitic on roots of other vascular plants, herbaceous, achlorophyllous, subterranean, thin, glabrous.

Leaves -
Alternate, few, reduced to scales, whitish-tan, 2-3mm long, glabrous, ovate.

Inflorescence - Solitary flower on axillary pedicel to 15cm long. Pedicel glandular pubescent, erect.

Flower -
Corolla typically white, tubular, 2.2cm long, dense glandular pubescent, 5-lobed. Lobes to 6mm long, 4.5mm broad, with two yellow bearded strips alternating with two bottom lobes. Stamens 4, adnate at base of corolla tube, alternating with lobes. Filaments white, glabrous, to +4mm long. Anthers pale yellow, 1.1mm long. Style 7-8mm long, glabrous, tubular, expanded at apex. Stigma two lobed. Calyx tube campanulate, 5-... read more


On Jan 4, 2004, kennedyh from Churchill, Victoria,
Australia (Zone 10a) wrote:

This pretty little plant has no leaves and is a root parasite on Stonecrops (Sedum sp.) and Alum-roots (Heuchera sp.)