CATALOGUE. 171 



rowly or broadly lanceolate, l-2j° long, 3-6" broad, more or less scabrous- 

 pubescent, entire or obscurely serrulate ; heads 12-16" broad, mostly terminal 

 on long branches ; chafF of the receptacle rather rigid, pungently acute ; rays 

 10-12, oblong-oval, entire or slightly emarginate ; achenia compressed- 

 pyriform, scarcely angled, black and somewhat shining.— California to Col- 

 orado, and southward to Arizona and New Mexico. Utah, from the foot- 

 hills of the Promontory Range to Bear River Canon; 6-8,000 feet elevation; 

 July-October. (606.) 



Chjsnactis ^ Xantiana, Gray. Proc. Amer. Acad., 6. 54S. Sparingly 

 lanulose, soon nearly glabrous ; stems 6-9' high, sparingly branched ; leaves 

 l-2i' long, linear, with a few distant oblong-hnear lobes ; heads rather few, 

 8-10" long ; involucral scales oblong-lanceolate, rather lax, the longest 

 scarcely equaling the corollas ; corollas flesh-colored, the outer ones but little 

 larger and not longer than the others ; achenia hispid ; pappus of 4 inner 

 lanceolate scales, nearly as long as the corolla, and 4 outer ones, very short 

 and broadly cuneate-obcordate. — Near Carson City, Nevada, (Dr. Ander- 

 son !) Southern California, (Xantus, Dr. Van Horn !) 



Chjsnactis maceantha. a span high, pubescent with deHcate partly 

 deciduous wool; stems much branched, especially at the base; leaves 1-2' 

 long, 1-2-pinnatifid with oblong lobes about 1" wide : scales of the obconic 

 involucre in two rows, linear-lanceolate ; corollas 6" long, flesh-colored, 

 minutely pubescent, narrowly obconic, scarcely expanded at the summit, the 

 marginal ones not appreciably larger than the others ; anthers included ; 

 branches of the style at length exserted ; achenia blackish, hispid ; pappus 

 of 4 oblong-linear scales, shorter than the achenia and only half the length 

 of the corollas, and 4 outer oblong-cuneate ones, i-J as long as the inner 

 ones. — Near the last, but has more compound leaves and much longer 

 flowers. Foot-hills of Western Nevada, 5,000-5,500 feet elevation; May, 

 June. Plate XVIII. Fig. 1. A plant ; natural size. Fig. 2. Achenium 



' CHJ3NACTIS, D C. Heads many-flowered ; flowers all tuljiilar and perfect ; the corollas glabrous 

 or puberulent, elongated, narrowly obconic or ampliated above and trumpet-shaped, 5- toothed, tbo outer 

 ones (rays) more expanded than the rest and often somewhat irregularly ventricose, 5-cleft ; teeth or 

 lobes pubescent. Involucre campanulate, the scales oblong-linear, about 20, in 1-2-rows. Eeoeptacle 

 alveolate. Style with very long narrowly linear branches, the upper part hispid. Achenia linear, taper- 

 ing to the base, striate or quadrangular. Pappus of 4-12 hyaline membranous usually nerveless scales, 

 with erosely denticulate margins, those of the disk-flowers usually much shorter. — Annual, biennial 

 or perennial herbs, natives of Western North America, with alternate 1-3-pinnatifld leaves, and rather 

 large heads terminating the simple or corymbose branches. 



