Orobanche cernua var. australiana
(F.Muell. ex Tate) J.M.Black ex Beck Australian BroomrapeBrown erect herb, usually 15–45 cm high, glandular-hairy with hairs on the inflorescence and stem 0.1–3 mm long, appressed and irregularly curled. Leaves broad-ovate, 8–20 mm long, 2–5 mm wide; bracts often larger than leaves. Calyx segments 10–15 mm long, entire, obscurely ribbed, appressed on either side of the corolla, possibly sometimes also with a minute abaxial sepal present; corolla 15–20 mm long, purple at least on the lobes, glabrous but for small patches of irregularly curled glandular hairs, tube initially ascending then decurved, upper lip emarginate or 2-lobed and recurved, lower lip 3-lobed, the lobes obscurely crenate; stamen filaments glabrous, thickened towards base, anthers drying white; style whitish. Capsule 8–10 mm long. Flowers mostly spring.
LoM, MuM, RobP, MuF, Gold, NIS. Also WA, SA, NSW. Extremely rare across its entire range; in Victoria known only from Eucalyptus microcarpa woodland on heavy black clay near Kamarooka (1986), and a pre-1900 collection labelled 'Swan Hill'. A fragmentary, fruiting specimen from sandy mallee near Hattah (1977) may also be referable to this species.
Known only from restricted populations throughout its Australian range, attached to native Asteraceae (e.g. Senecio spp.). Its northern counterpart (i.e. var. cernua), ranging from the Philippines to Europe, is a serious agricultural pest. There is no evidence for the Australian taxon attaching to introduced plants.
Barker, W.R. (1999). Orobanchaceae. In: Walsh, N.G.; Entwisle, T.J., Flora of Victoria Vol. 4, Cornaceae to Asteraceae, pp. 539–541. Inkata Press, Melbourne.