[ 7 ] 144 



ered with a whitish, very scabrous pubescence. The leaves are 

 scarcely an inch long, ovate, entire, obtuse, with short petioles, 

 and scabrous on both sides. Chaff of the receptacle embracing 

 the obovate achenium, the margin of which is furnished with long 



silky hairs. 



Wulfia'? Specimens of a plant with the floral characters of this 

 genus, but with different foliage, were found in abundance on the 

 higher grounds bordering the valley of the Gila. It also resembles 

 Leighia, but is destitute of a pappus. Some of the genera, to 

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

 be satisfactorily determined. 



Ximenesia, 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, Cavan. 

 RiddelliAjTAgetina, JVutt. Torr.and Gr.Jl.yJV. 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 this unpublished genus, dedicated to that profound observer of na- 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, Harv. and Gr. 

 The whole plant is clothed with a woolly pubescence, and varies 

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

 somjewhat pinnatately cut into several narrow segments. The heads 

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

 are more than an 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 corolla of the disk-flowers with five 

 short segments which are glandulary 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. 



Zinnia grandiflora, Nult. in Amer. Phil, trans, (n. ser.) 7, p. 

 348; Torr. and Gray ft. JV. Amer. 2. p. 298. Valley of the Del 

 Norte. This plant, which was first detected by Dr. James in Long's 

 first expedition, is certainly frutescent at the base; in which re- 

 spect it resembles the nearly allied Z. linearis. Bent h. plant Hartw., 

 No. 47. This is the most humble species of the genus; being not 

 more thansix inches high. The stem is branching and rigid. The 

 leaves are linear, sessile, and somewhat connate at the base, 

 strongly 3 nerved, and glandularly punctate. Heads most solitary, 

 at the summit of the branches, on short peduncles. Involucre 

 ovoid-cylindrical; the scales about 8, closely imbricated; outer ones 

 somewhat orbicular; the inner oblong, ciliate, and somewhat scari- 

 ous on the margin. Ray flowers 3 5, coriaceous and persistent, 

 roundish-ovate, emarginate, continuous with the summit of the 

 achenium. Disk-flowers few. Lobes of the corolla villous. An- 



