140 BOTANY. 



diameters. Except where otherwise specified, the figures arc enlarged 

 about 10 diameters. 



Bbickellia betokicjefolia, Gray (PI. Wright. 2, 72) — Erect, covered 

 with spreading, jointed hairs ; leaves sessile, ovate, 3-nerved, crenate, hairy 

 and BOmewhat glandular above and below, becoming smaller toward the 

 top and gradually reduced to mere bracts; 2-4 heads of flowers on pedun- 

 cles from the axils of the upper and opposite leaves; involucre in two or 

 three series, all acute and ribbed, but the inner twice longer than the outer; 

 pappus rough and achenium silky villose. — Arizona, Prof. Oscar Loew. 



Bbickellia Wbightii, Gray (PI. Wright. 2, 72).— Sub-shrubby, 4° 

 high, much branched, glabrous or puberulent below, sub-scabrous and 

 glandular above; leaves petioled, cordate, irregularly crenately toothed; 

 veins prominent below; inflorescence thyrsoid-paniculate, each branch 

 from the axil of a small leaf or branch; pedicels distinctly glandular hairy; 

 heads about 15-flowered; corollas slender and styles much exserted; achenia 

 hirto-puberulent ; pappus roughish ; scales of the involucre in about three 

 series, purple-tipped, plainly nerved, obtuse. — Black River, south of Camp 

 Apache, Ariz., at 5,000 feet elevation (793). 



Bbickellia Californica, Gray. — Nevada and Utah. 



Brickellia grakdiflora, Kutt. — Colorado (422, 423). 



Liatris scariosa, Willd — Dwarfed specimens from Trout Creek, Colo- 

 rado (458). 



Xakthocephalum* gthkospebmoIdes, Benth. & Ilook. {Gutter i< :<ii .' 

 gymnospermoides, Gray, PL Wright. 2, 79.) — Smooth, erect, herbaceous, 2-3° 

 high ; leaves lanceolate, entire or nearly so, tapering into a petiole, slightly 

 glistening with a gummy exudation, 2-3' long, and about G" wide; heads 

 in a compound corymb; rays many, rather small, without pappus; disk- 

 flowers with a minute crown-like pappus of chaff, which in the central 



•Xamiiocii'iiaum, Wilkl.— lknds heterogamone ; flowers of the ray pistillate, numerous, about 

 L-seriate; disk-flowers perfect, fertile. Involucre hemispherical or broadly campannlate; bracts iu many 

 series, iinbiicated, coriaceous, with appressed or spreading tips, tbo outer ones smaller. Receptaclo 

 plane, fbveolate. Pistillate corolla ligulate, sub-entire, spreading, elongated of small; perfect flowe s 

 regular, tubular; limb somewbat enlarged, 5-cleft at the apex. Anthers entire, obtuse at base. Style 

 of the perfect Bowers with flattened branches; appendages triangular or lanceolate. Achenia hardly 

 compressed, smooth or striate. Pappus of minute chaff, coroniform or none. — Herbs or shrubs, with 

 creel or ascending Btemp, often branching. Iliads middle or large Bized, solitary, on the end of tbo 

 branches or loosely corymbose. Flowers all yellow. Achenia smooth. — 15i.vm.iv & Uookeb. 



