140 BOTANY. 



diameters. Excej)t where othenvise specified, the figures are enlarged 

 about 10 diameters. 



Brickellia betonicefolia, Gray (PI. Wright. 2, 72). — Erect, covered 

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

 and somewhat 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. 



Brickellia Wrightii, 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). 



Brickellia Californica, Gray. — Nevada and Utah. 



Brickellia grandiflora, Nutt. — Colorado (422, 423). 



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

 rado (458). 



Xanthocephalum* gymnospermoides, Benth. & Hook. (Gutierrezia? 

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

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

 glistening Avith a gummy exudation, 2—3' long, and about 6" 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 



•Xanthocephalum, Willd. — Heads heterogamous; flowers of the ray pistillate, numerous, about 

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

 series, imbricated, coriaceous, with appressed or spreading tips, tho outer ones smaller. Receptacle 

 plane, foveolate. Pistillate corolla ligulate, sub-entire, spreading, elongated or small; perfect flowers 

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

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

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

 erect or ascending stems, often branching. Heads middle or large sized, solitary, on the end of the 

 branches or loosely corymbose. Flowers all yellow. Achenia smooth.— Bextham & Hooker. 



