Orobanchaceae 373 



parted, the segments oblong, doubly serrate-toothed or incised ; 

 spike terminal, dense or at length loose; bracts linear, ciliate or 

 serrulate toward the apex, mostly shorter than the flowers ; calyx 

 5-angled, equally or unequally 5-toothed, 6-8 mm. long; corolla 

 crimson, 2.5 cm. long or more; galea large, somewhat broader 

 above, strongly arched, lower lip small, of 3 rounded teeth ; fila- 

 ments glabrous. 



Laurel Canyon, Santa Monica Mountains, Davidson. February. 



2. P. semibarbata Gray. Nearly acaulescent, depressed, more 

 or less pubescent ; leaves in a basal tuft, 15-20 cm. long, on petioles 

 mostly exceeding the irregular sessile spikes, 2-pinnately parted 

 or nearly so, the oblong lobes laciniately few-toothed; corolla 

 yellowish, tinged with purple, pubescent without, about 2 cm. 

 long; galea nearly straight; filaments villous above. 



Frequent on dry ridges in the open pine forests of all our mountains. 

 May-July. 



Family 87. OROBANCHACEAE. BROOM-RAPE 

 FAMILY. 



Erect simple or branched, brown, yellow, purplish or 

 nearly white root-parasites. Leaves reduced to alternate 

 appressed scales. Flowers perfect, irregular, sessile in 

 terminal bracted spikes, or solitary and peduncled in the 

 axils of the scales. Calyx 4-5-toothed or 4-5-cleft, or 

 split on one or both sides nearly or quite to the base. 

 Corolla more or less oblique, the limb 2-lipped, 5-lobed. 

 Stamens 4, didynamous, inserted in the tube of the 

 corolla alternate with the lobes, a fifth rudimentary one 

 sometimes present. Ovary superior, 1-celled, with 4 

 parietal placentae ; ovules numerous ; style slender ; 

 stigma discoid, 2-lobed or 4-lobed. Capsule 1-celled, 

 2-valved. 



Flowers bractless, nearly regular. 1. THALESIA. 



Flowers bracteate, strongly 2-lipped. 2. OBOBANCHE. 



