374 Orobanchaceae 



1. THALESIA Raf. 



Glandular or viscid-pubescent simple-stemmed herbs, 

 parasitic on the roots of various plants, with scattered 

 scales, and long-peduncled yellowish, white or violet per- 

 fect bractless flowers. Calyx campanulate or hemi- 

 spheric, nearly equally 5-cleft, the lobes acute or acumi- 

 nate. Corolla oblique ; the tube elongated, curved ; the 

 limb slightly 2-lipped ; the upper lip erect-spreading, 

 2-lobed ; the lower spreading, 3-lobed, the lobes all 

 nearly equal. Stamens included ; anther-sacs mucro- 

 nate at the base. Ovary ovoid ; style slender, decidu- 

 ous ; stigma peltate or slightly 2-lobed. 



1. T. fasciculata (Nutt.) Britton. Stem erect, 5-10 cm. high, 

 densely glandular-pubescent, bearing several scales and 3-15 naked 

 1-flowered peduncles, 2.5-10 cm. long; calyx broadly campanu- 

 late, 6-10 mm. long, its lobes triangular-lanceolate or triangular- 

 ovate, acute, equaling or shorter than the tube ; corolla about 2 

 cm. long, purplish-yellow, puberulent within; the curved tube 3 

 times as long as the limb; the lobes oblong, obtuse. (Aphyllon 

 fasciculatum Gray.) 



Occasional in rather dry ground in the San Gabriel and Santa Ana Moun- 

 tains; growing on the roots of various shrubs. May-July. 



2. OROBANCHE L. 



Glandular-pubescent, erect, simple or branched herbs, 

 parasitic on the roots of various plants, with scattered 

 scales, and spicate or racemose perfect bracted and some- 

 times bracteolate flowers. Calyx split both above and 

 below, nearly or quite to the base, the divisions 2-cleft 

 or rarely entire, or more or less unequally 2-5-toothed. 

 Corolla oblique, strongly 2-lipped ; upper lip erect, emar- 

 ginate or 2-lobed ; lower lip spreading, 3-lobed. Stamens 

 included ; anther-sacs mostly mucronate at the base. 



