Psathyrotes. COMPOSITE. 409 



* 



rootstock or caudex, alternate sessile and entire leaves, and small corymbose heads 

 of light yellow flowers. Benth. in Hook. Ic. PI. t. 1139, & Gen. PL ii. 438. 



1. L. hypoleuca, Benth. A foot high, equally leafy to the top : leaves ovate- 

 oblong or elliptical, obtuse, an inch long, reticulate-veiny, very white beneath, 

 becoming green and glabrous above with age : heads half an inch long, on rather 

 slender peduncles, 3 to 9 in an open cluster : corolla-lobes almost half the length of 

 the funnelform throat. 



Var. Californica, Gray. More densely -woolly : upper surface of the leaves 

 hardly becoming naked : lobes of the corolla only a third or fourth of the length of 

 the throat. Proc. Am. Acad. ix. 206. 



The species was collected by Dr. Lyall only in the Cascade Mountains, on the frontiers of Brit- 

 ish Columbia. Var. Californica, on Chimney Rock, Mendocino Co., and on the coast mountains 

 back of Santa Cruz, California, Kellogg. 



100. PSATHYROTES, Gray. 



Head rather many-flowered, homogamous; the flowers all tubular and perfect. 

 Involucre campanulate, of one or two series of nearly equal somewhat herbaceous 

 scales, or the inner more scarious. Receptacle flat or barely convex, naked. Corol- 

 las narrow, with proper tube usually very short, 5-toothed ; the teeth short and 

 obtuse, externally glandular or viscid-bearded. Anthers minutely sagittate-auricled 

 at base. Style-branches obtuse or somewhat truncate, destitute of any distinct 

 appendage. Akenes turbinate or oblong with narrow base, villous or hirsute. 

 Pappus of copious and unequal rather rigid (naked or merely scabrous) capillary 

 bristles, shorter than the corolla, generally rusty or brownish. Low and more or 

 less glandular or viscid-pubescent herbs, of heavy or balsamic odor (mostly of the 

 interior desert region) ; with alternate leaves, and rather small or middle sized heads 

 of light yellow or yellowish flowers. PL Wright, ii. 100, t. 13, & Proc. Am. Acad. 

 vii. 363, & ix. 206. 



1 . Very low or prostrate and diffusely muck branched annuals : leaves rounded and 

 toothed or angled, on long petioles : heads short-petioled in the forks, nodding 

 after flowering : akenes turbinate, very villous : bristles of t/ie pappus rigid 

 and almost in a single series. 



1. P. annua, Gray, 1. c. Scurfy-pubescent or mealy-hoary : leaves coarsely an- 

 gulate-toothed, the lower rounded or reniform and the upper dilated-cuneate : corol- 

 las yellowish. Bulbostylis (Psathijrotes) annua, Nutt. PL Gamb. 179. 



In saline desert soil, Mono Lake (Brewer), western part of Nevada (Torrey, Watson), and prob- 

 ably Arizona (not New Mexico) ; first collected by Dr. Gambel. A span high : leaves about 

 half an inch long and broad : heads 3 or 4 lines high. The herbage much resembles some species 

 of Atriplex of the Obione section. Style-branches of this and the following capitellate-truncate 

 with a slight penicillation, of the Senecionoid or Helenioid type. 



2. P. ramosissima, Gray, 1. c. Resembles the foregoing, but truly woolly : 

 leaves crenately few-toothed : corollas bright yellow : akenes short-turbinate. 

 Tetradymia (Polydymia) ramosissima, Torr. in Emory Rep. 1848, 145. 



Gravelly hills of the southeastern borders of the State, near Fort Mohave (Cooper) : and in 

 Arizona on the Gila, Emory, Fremont, Thurber, Parry. 



2. Erect, rigid, and seemingly rather woody at base : leaves sessile and filiform : 

 akenes oblong : bristles of the pappus less rigid. PEUCEPHYLLUM, Gray. 



3. P. Schottii, Gray, 1. c. A span to a foot high, with ascending branches, 

 leafy to the solitary erect head, nearly or quite glabrous, but somewhat glutinous : 



