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Family Orobanchaceae

Description: Hemiparasitic to holoparasitic herbs, shrubs or vines. Rhizomatous or tuberous, with rhizomes forming rootlets which are swollen where attached to roots of the host plant.

Leaves much reduced to scales or absent. If present leaves membranous, sessile, simple and entire with eglandular hairs.

Inflorescence terminal, a raceme or spike. Corolla 5-merous, strongly 2 lipped, stamens 4, staminode one when present, ovary 1 or 2-locular.

Fruit a capsule. Seeds 12- many, dehiscent, minute.


Distribution and occurrence:

Temperate to tropical, cosmopolitan. East South America, Eastern Australia and New Zealand. World 96 genera; 2059 species. Australia c. 20 species

External links:
Angiosperm Phylogeny Website (Family: Orobanchaceae, Order: Lamiales)
Wikipedia

Text by Louisa Murray
Taxon concept: Kadereit, J.W. (2004) The Families and Genera of Vasdcular Plants. p 405.

 Key to the genera 
1Leaves scale-like; stem, leaves, bracts and calyx brownOrobanche
1Leaves conspicuous, not scale-like; stem, leaves, bracts and calyx green2
2Calyx spathe-like, compressed, split down the lower edge, 5-toothed or entire at apexCentranthera
Calyx not compressed, equally cleft between the lobes or sepals, 3–5-lobed or toothed
                       Back to 1
3
3Leaves with glandular hairs and often on other parts of the plant; calyx tubular to cup-shaped, 4-lobed or toothed; corollas various with lobes uneven5
3Leaves without glandular hairs, but with other hair types5
4Hairs on leaves retrorse and non-glandular; calyx tubular, 10-veined, 5-toothed; corolla trumpet shaped lobes more or less equalBuchnera
Hairs on leaves antrorsely scabrid with white crystalline hairs, calyx 5-ribbed; corolla tubular with short spreading lobes
                       Back to
Striga
5Upper corolla lobes recurved; calyx 4-lobedEuphrasia
Upper corolla lobes pointed outwards; calyx 4-toothed
                       Back to 3
6
6Capsules oblong; seeds smooth or finely reticulate, c. 0.5 mm longParentucellia
Capsules globose; seeds ribbed, scalariform between ribs, c. 0.7 mm long
                       Back to 5
Bartsia

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