- OROBANCHE OROBANCHACEZ 541 
THALESIA 
1 OROBANCHE L. Sp. 632. (1753.) 
Glandular-pubescent reddish yellowish violet or nearly white 
herhs, parasitic on the roots of various plants, with scattered scales 
and spicate or racemose bracted and sometimes 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 bilabiate: upper lip erect, 
emarginate or 2-lobed: lower lip spreading. 3-lobed. Stamens 
not exserted: anther-cells mostly mucronate at the base. Pla- 
centz. equidistant or approximate in pairs. Style slender, usually 
persistent until after the dehiscence of the capsule: stigma pel- 
tate to funnelform, entire or laterally 2-lamellate. 
0. comosa Hook. FI. ii, 93. Aphyllon comosum Gray. Puberulent: 
stems stout, 2-4 inches high, branching close to the ground: scales rather 
few, oblong-ovate to lanceolate: flowers corymbose or paniculate-racemose, 
on stout pedicels 4-8 lines long: bractlets one or two, on the pedicels or 
sometimes at the base of the flower: calyx deeply 5-parted; lobes subulate- 
linear and attenuate, 6-10 lines long: corolla pink or pale purple, an inch 
or more long; upper lip barely spreading. obtuse; lower lip acutely 3-too- 
thed, spreading: anthers woolly: capsule oblong, obtuse, 6 lines long: 
re very numerous, yellowish. On dry hills, eastern Washington to 
alifornia. 
0. Californica Cham. & Schlect. Linn. iii, 1384. Aphyllon Californi- 
cum Gray Pubescent with short hairs and viscid: stems stout, 8-10 
inches high: flowers crowned in an oblong dense raceme or thyrsus: 
pedicels shorter than the calyx: bractlets close to the calyx, linear-lanceo- 
late : calyx deeply 5-parted, the subulatelinear lobes 6-10 lines long: corolla 
yellowish or purplish, but little longer than the calyx its short oblong 
lobes barely spreading: anthers glabrous or slightly hairy. Sandy places, 
Oregon to California and Nevada. 
0. pinetorum Geyer. Hook.» Kew Journ. Bot. iii, 297. Aphyllon 
pinetorum Gray. Pubescent with short whitish hairs: stems rather slen- 
der above the thickened tuber-like base, 6-12 inches high: flowers subsessile 
or short pedicelled, in a long and rather loose panicle: calyx 2-bracteolate 
at base, deeply 5-cleft, the lobes subulate from a broad base, not longer 
than the tube: corolla yellowish, 6 lines long: anthers glabrous: capsule 
oblong, obtuse, 4 lines long, exceeding the calyx. On the roots of conifer- 
ous trees, Oregon to Brit. Columbia. . 
2 THALESIA Raf. Am. Month. Mag. ii, 267. (1818.) 
APHYLLON Gray Man. 290. (1848.) 
Glandular or viscid-puhescent herbs, parasitic on the roots of 
various plants, with scattered scales, and long-peduncled yellow- 
ish white or violet complete and perfect bractless flowers. Calyx 
nearly equally 5-cleft, the lobes acute or acuminate. Corolla ob- 
lique: the tube elongated, curved: the limb slightly bilabiate, the 
upper lip erect-spreading, 2-lobed: the lower lip spreading, 3-lob- 
ed, the lobes all nearly equal. Stamens included: anther-cells 
mucronate at the base. Ovary ovoid: placentee eyuidistant or 
contiguous in pairs. Style slender, deciduous: stigma peltate, or 
transversely bilamellate. 
