Belongs within: Orobanchaceae.
Orobanche, broomrapes, is a genus of holoparasitic plants native to the Old World though some species have become widely distributed as pasture weeds. Members of the genus have a basic chromosome number of 19. Polyploidy is relatively uncommon, arising separately in O. macrolepis, O. transcaucasica, and the clade of O. austrohispanica, O. foetida and O. gracilis (Schneeweiss et al. 2004).
Characters (Hickman 1993): Annual or perennial, generally glandular-puberulent above; root attachment sometimes tuber-like. Stem simple or branched. Inflorescence generally more or less spike-like (lower flowers often short-pedicelled or on short branches), generally dense; flowers generally >20; bracts generally lanceolate to deltate (wider on peduncle); bractlets 0 or 2. Flower with calyx lobes generally 4–5; corolla glandular-puberulent (hairs short and tack-shaped or long-stalked), generally lacking ring of hairs at stamen bases, upper lip erect to reflexed, generally two-lobed, lower lip three-lobed, spreading, yellow-lined; anthers glabrous to hairy; stigma lobes 2, spreading or peltate. Fruit two-valved; placentas generally 2 or 4, often lobed. Seed <0.7 mm.
<==Orobanche [Orobanchoideae]
|--O. macrolepisSP04
`--+--+--O. anatolicaSP04
| `--O. colorataSP04
`--+--O. cernuaSP04
| |--O. c. var. cernuaSP04
| |--O. c. var. cumanaSP04
| `--O. c. var. desertorumSP04
`--+--O. coerulescens [incl. O. ammophila]SP04
`--+--+--O. caryophyllaceaSP04 [incl. *O. majorBGS05]
| `--O. teucriiSP04
`--+--O. luteaSP04 [=O. fasciculata var. luteaH93]
|--O. rapum-genistaeSP04
| |--O. r. ssp. rapum-genistaeSP04
| `--O. r. ssp. benthamiiSP04
|--+--+--O. austrohispanicaSP04
| | `--O. gracilisSP04
| `--+--O. crinitaSP04
| `--O. densifloraSP04
`--+--+--O. raddeanaSP04
| `--+--O. grossheimiiSP04
| |--O. reticulataSP04
| | |--O. r. ssp. reticulataSP04
| | `--O. r. ssp. pallidifloraSP04
| `--+--O. albaSP04
| `--+--O. flavaSP04
| `--+--O. haenseleriSP04
| `--+--O. lucorumSP04
| `--O. salviaeSP04
`--+--O. bartlingiiSP04
|--O. elatiorSP04
`--+--O. sintenisiiSP04
`--+--+--O. amethysteaSP04
| `--O. hederaeSP04
`--+--O. artemisiae-campestrisSP04
|--O. crenataSP04
|--O. minor Sutt. 1798SP04, C06
|--O. oweriniiSP04
|--O. picridisSP04
|--O. pubescensSP04
`--O. transcaucasicaSP04
Orobanche incertae sedis:
O. alsaticaSP04
|--O. a. ssp. alsaticaSP04
|--O. a. ssp. libanotidisSP04
`--O. a. ssp. mayeriSP04
O. australiana [=O. cernua var. australiana]BR65
O. epithymumSS72
O. foetidaSP04
O. hydrocotylei Colenso 1889A61
O. kashmiricaSP04
O. laserpitii-silerisSP04
O. maritimaSP04
O. oxylobaPT98
O. santolinaeSP04
*Type species of generic name indicated
References
[A61] Allan, H. H. 1961. Flora of New Zealand vol. 1. Indigenous Tracheophyta: Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledones. R. E. Owen, Government Printer: Wellington (New Zealand).
[BGS05] Banfi, E., G. Galasso & A. Soldano. 2005. Notes on systematics and taxonomy for the Italian vascular flora. 1. Atti Soc. It. Sci. Nat. Museo Civ. Stor. Nat. Milano 146 (2): 219–244.
[BR65] Black, J. M., & E. L. Robertson. 1965. Flora of South Australia. Part IV. Oleaceae–Compositae. W. L. Hawes, Government Printer: Adelaide.
[C06] Cheeseman, T. F. 1906. Manual of the New Zealand Flora. John Mackay, Government Printer: Wellington.
[H93] Hickman, J. C. (ed.) 1993. The Jepson Manual: Higher Plants of California. University of California Press: Berkeley (California).
[PT98] Panitsa, M., & D. Tzanoudakis. 1998. Contribution to the study of the Greek flora: Flora and vegetation of the E Aegean islands Agathonisi and Pharmakonisi. Willdenowia 28: 95–116.
[SP04] Schneeweiss, G. M., T. Palomeque, A. l. E. Colwell & H. Weiss-Schneeweiss. 2004. Chromosome numbers and karyotype evolution in holoparasitic Orobanche (Orobanchaceae) and related genera. American Journal of Botany 91 (3): 439–448.
[SS72] Singh, V., & H. Singh. 1972. A contribution to the flora of Gangolihat block in Pithoragarh District. Journal of the Bombay Natural History Society 69 (2): 352–368.