California Broomrape: Aphyllon californicum ssp. grayanum (Synonyms: Orobanche californica ssp. grayana, Orobanche californica var. grayana, Orobanche grayana, Orobanche grayana var. grayana) - Flowers on pedicels less than 3 cm long with several narrow bractlets found in addition to the wider subtending bract. Calyx 10-20 mm long with lobes much longer than the tube. The corolla is large and showy, measuring 25-40 mm long with long, widely spreading lips from 10-14 mm long. Found northwest of Lakeview, OR.
Flat-top Broomrape, Flat-topped Broomrape: Aphyllon corymbosum ssp. corymbosum (Synonyms: Myzorrhiza corymbosa, Orobanche californica var. corymbosa, Orobanche corymbosa ssp. corymbosa) - Flowers on pedicels less than 3 cm long with several narrow bractlets found in addition to the wider subtending bract. Calyx 10-20 mm long with lobes much longer than the tube. Corolla 16-25 mm long with short, erect to somewhat spreading lips from 4-9 mm long.
Flat-topped Broomrape: Aphyllon corymbosum ssp. mutabile (Synonym: Orobanche corymbosa ssp. mutabilis)
Clustered Broomrape: Aphyllon fasciculatum (Synonyms: Anoplanthus fasciculatus, Aphyllon fasciculatum, Orobanche fasciculata, Orobanche fasciculata var. fasciculata, Orobanche fasciculata var. franciscana, Orobanche fasciculata var. lutea, Orobanche fasciculata var. subulata, Orobanche fasciculata var. typica, Thalesia fasciculata, Thalesia lutea) - Flowers pink to fleshy-brown in color. Alwys parsitic upon Artemisia sp.. The flowers are atop long pedicels from 3-25 cm long and which lack bractlets. 4-10 dull red to yellowish flowers may be present. The calyx lobes are shorter than to as long as the calyx-tube.
Clustered Broomrape: Aphyllon franciscanum (Synonym: Orobanche fasciculata var. franciscana) - Yellow flowers. Parasitic upon Eriogonum sp., Eriophyllum lanatum, and Phacelia sp.. Never parasitic upon Artemisia sp..
Louisiana Broomrape, Sand-dune Broomrape, Suksdorf's Broomrape: Aphyllon ludovicianum (Synonyms: Aphyllon arenosum, Conopholis ludoviciana, Myzorrhiza ludoviciana, Orobanche ludoviciana, Orobanche ludoviciana ssp. ludoviciana, Orobanche ludoviciana var. arenosa, Orobanche ludoviciana var. genuina, Orobanche multiflora, Orobanche multiflora var. arenosa) - Flowers sessile with several narrow bractlets found in addition to the wider subtending bract. Calyx 10-20 mm long with lobes much longer than the tube. Corolla 15-22 mm long.
Conifer Broomrape, Ocean Spray Broomrape, Pine Broomrape, Pinewoods Broomrape: Aphyllon pinorum (Synonyms: Myzorrhiza pinorum, Orobanche pinorum, Phelipaea pinorum) - Flowers sessile or on pedicels less than 3 cm long with several narrow bractlets found in addition to the wider subtending bract. Calyx 5-8 mm long with lobes shorter than or equal to the tube.
Naked Broomrape, One-flowered Broomrape, Purple Broomrape: Aphyllon purpureum (Synonyms: Orobanche uniflora, Orobanche uniflora ssp. occidentalis, Orobanche uniflora var. minuta, Orobnche uniflora ssp. occidentalis, Orobnche uniflora var. occidentalis, Orobanche uniflora var. purpurea) - The following taxa have now been lumped into Aphyllon purpureum.
Naked Broomrape, Oneflowered Broomrape: Orobanche uniflora var. occidentalis (Synonyms: Orobanche uniflora var. minuta, Orobanche uniflora ssp. occidentalis) - The flowers are atop long pedicels from 3-25 cm long and which lack bractlets. 1-3 cream to light yellowish to purplish flowers may be present. The corolla tube is narrow. The calyx lobes are longer than the calyx-tube.
Purple Broomrape, Naked Broomrape, Oneflowered Broomrape: Orobanche uniflora var. purpurea (Synonym: Orobanche uniflora ssp. purpurea) - The flowers are atop long pedicels from 3-25 cm long and which lack bractlets. 1-3 cream to light yellowish to purplish flowers may be present. The corolla tube flares wide at its distal end. The calyx lobes are longer than the calyx-tube.