CATALOGUE. 147 



It is evident that this plant is near to 8. odora, Ait., but it appears to 

 differ in its leaves and in the obtuse scales of the involucre, as well as in 

 the larger number of flowers (of both kinds) in the head, and in the 

 absence of the characteristic odor of odora. I name it in honor of Lieut. 

 Wm. L. Marshall, United States Engineers, for whose assistance in my 

 work I am under many obligations. — Chiricahua Agency, Southern 

 Arizona (530). 



Solidago Missouriensis, Nutt. — Twin Lakes, Colorado (405). 



Solidago Canadensis, L. (var. ?) — This form has been placed here 

 by Dr. Gray. It is, however, nearly perfectly smooth, or at most only 

 puberulent below and slightly pubescent above ; leaves also are barely 

 roughish above and glabrous below. — Twin Lakes, Colorado (406). 



Aphanostephus * ramosissimus, DC. — Stems much branched from a 

 woody base, nearly glabrous, puberulent, or somewhat hispidly pubescent 

 at tip ; lower leaves narrowly spatulate or oblanceolate, variously toothed 

 or divided at the apex, closely sessile, 1-2' long, 1-3" wide ; upper 

 leaves narrower, more entire and pubescent or hispidly pubescent ; heads 

 3" in diameter; involucre-scales in two series, oblong, rather acute and 

 pubescent, the apices and margins distinctly scarious ; rays 2-4" long, 

 narrow, at first a little pinkish and afterward yellowish or white ; disk- 

 flowers yellow, hardly longer than the scales of the involucre (in my 

 specimens, there is no evident thickening of the tube of the disk-flowers); 

 pappus coroniform, of very short bristles ; achenia obscurely angled, many- 

 ribbed (most distinctty so on the inner side), and with a few rather long 

 hairs. — My specimens (336) from the Gila River, in Arizona (2,800 feet 

 altitude), show considerable range of variation in shape of leaves, acuteness 

 of involucral scales, and degree of pubescence. 



* Aphanostephus, DC— Heads heteronymous, radiate; ray-flowers fertile; disk -flowers perfect. 

 Involucre bemispberical, the linear or lanceolate bracts imbricated in a few series, tbeir apices and 

 margins scarious [slightly], exterior ones somowhat shorter. Receptacle convex. Rays narrow, spread- 

 ing and entire; disk-flowers tubular, the limb elongated, slightly enlarged, 5-toothed. Anthers entire 

 and obtuse at the base. Branches of the style in the perfect flowers compressed, terminated by very 

 short, obtuse appendages. Achenia subterete or obtusely 4-5-angled, many-ribbed. Pappus coroniform 

 dentate, sometimes short. — Much branched, erect or ascending, canesceutly puberulent herbs. Heads 

 solitary on the dilated apices of the branches. Rays white ; disk yellow. Achenia smooth.— Bentiia.m 

 & Hooker. 



