144 Ex. Doa No. 41 



J 



which the plant is allied, will need revision before its place can be 

 satisfactorily determined. 



Ximenesiaj n. sp,l Valley of the Del Norte, and along the Gila, . 

 September and October. This needs comparison with some of the 

 Mexican species, It very nearly resembles X. encelioides Cdvan. 



Riddellia tagetina, JVutf." Torr. and Gr. Jl.^^ JV. Amer. 2^ p. 362. 

 Valley of the Del Norte, about two hundred miles below Santa Fe. 

 A beautiful plant with persistent flowers, first detected by Mr. Nutt- 

 all towards the sources of the Platte. 



Baileya, n. gen. Harv. and Gr.^ ined. Two other species of 

 this unpublished genus, dedicated to that profound observer of na- 

 ture. Professor Bailey of West Point, exist among the California 

 plants collected by Coulter, and will soon be described by Mr. 

 Harvey and Dr. Gray. This is distinguished from the others by its 

 numerous ray- flowers, and is the B. multiradiata^ " ' ^ 



' The whole plant is clothed. w:ith a \voolly pubescence, and varies 

 from a few inches to -a foot or more in height. The leaves are 

 somewhat pinnatately cut into several narrow segments. The heads 

 are on long naked peduncles, and when the rays are fully expanded 

 are more than ^n inch and a half in diameter. The rays are 40 or 

 50 in number, in two or more series, obovate cuneate, of a bright 

 orange yellow, and 7-nerved, carolla of the disk, flowers with five 

 short segments w^hich are glandularly pubescent, with intra-margi- 

 nal nerves. ' Branches of the style short, somewhat dilated and 

 truncate at the extremity. Very abundant along the Del Norte, 

 and in the dividing region between the waters of the Del Norte 

 and those of the Gila. Flowers from October 4th to November. 



Gaillardia amblyodon, Gay. On the upper'part of the Arkansas. 

 This species has been beautifully figured by Dr. Gray in M^^' 



Hi 



) 



G. pulchella, Foug. Valley of the Del Norte. 



Palafoxia linearis, Lag. New Mexico. 



~ ~ Great desert west of the Colorado. 



Artemisia' filifolia, Torr. in Ann. lye. JV, ^"--'" " - ''"'^ ^^^' 



H) 



ley of the Del Norte, and along the Gila; abundant. I 



A. .dracunculoides, Pt^r^A. Table lands of the Del Norte ana 



Gila. A very common species of wormwood, often called sag(^ J 



the -hunters. 



A. cana. Pursh. On the Raton Mountains. . 



Senecio' longilobus, Benth. in Jl. Ilariweg. ' A bushy spea 

 aho'jt three feet high, growing abundantly in the region betw 

 iY..: waters of the Del Norte and the Gila. i. 



Tetradymia'? (sub-genus Polydymia.) Heads about 16-nowere^ 



tl ■: flowers all tabular and perfect. Involucre of 15 to 16 '^^^°"o°pt 

 tiisc coriaceo-chartaceous scales which are slightly concave but n 

 caiiaate. Receptacle naked. Corolla- with a rather slender tu ^j 



the lobes short, ovate, erect, furnished viith long villous ^J^*'"? f 3 

 ternally. x^nthers included. Branches of the style tipped wu^.j^ 

 very short obtuse pubescent cone. Achenia oblong- turbinate, 

 lous with short hairs. Pappus of numerous, somewhat '^'S^'' , ^ 



ticulate bristles. A suffrutesce»t prostrate much branched pia ' 



