140 BOTANY. 



diameters. Except where otherwise specified, the figures are enlarged 

 about 10 diameters. 



Beickellia BETONiCiEFOLiA, Gray (PL 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 Weightii, Gray (PL 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). 



Beickellia Califoenica, Gray. — Nevada and Utah. 



Beickellia geandifloea, Nutt. — Colorado (422, 423). 



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

 rado (458). 



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

 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 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 in many 

 series, imbricated, coriaceous, with appressed or spreading tips, the outer ones smaller. Receptaclo 

 plane, foveolate. Pistillate corolla ligulate, Bub-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. — Bentham & Hooker. 



