Synonyms: Anoplanthus fasciculatus, Aphyllon fasciculatum, Orobanche fasciculata var. fasciculata, Orobanche fasciculata var. franciscana, Orobanche fasciculata var. lutea, Orobanche fasciculata var. subulata, Orobanche fasciculata var. typica, Thalesia fasciculata, Thalesia lutea
The photo above shows a close-up sideview of the tubular corolla of clustered broomrape as seen at about 4100' on the southeastern slopes of Mt. Adams................June 10, 2005. Note the numerous gland-tipped hairs on both the corolla and calyx. .
Clustered broomrape is a wildflower with solitary to clustered stems from 5-10 cm long that are buried. The pedicels are erect and extend from the ground from 7-24 cm high. The herbage is yellowish to reddish-purple (See photo above.) with glandular hairs. The long pedicels lack bractlets. The plants entirely lack chlorophyll.
The inflorescence consists of 4-10 flowers The calyx is 8-11 mm long with the tube measuring 4-6 mm long and the short, broadly triangular and pointed lobes from 3-5 mm long. The corolla is dull reddish with violet lines and yellow patches between the lobes of the lower lip. The corolla is 18-25 mm long with a curved tube while the corolla lobes are 2-6 mm long. The anthers are 1.5-2.0 mm long and range from glabrous to woolly.
Clustered broomrape may be found between the elevations of 1200-3000 meters in dry habitats including those with shadscale, sagebrush, pinyon pine or juniper.
Clustered broomrape may be found fro the southern Yukon south to northern Mexico and east to Alberta and south to Oklahoma, Illinois and Indiana.