COMPOSITA. lil 
from the other species, especially in its conoid or elongated receptacle. It is very near 
X. sericocarpum, A. Gr. 
5. Xanthocephalum dentatum, Schauer in Linnea, xix. p. 723. 
Mexico, without locality (Aschenborn). | 
6. Xanthocephalum gymnospermoides, Benth. et Hook. Gen. Plant. ii. 
p. 249. 
Gutierrezia? gymnospermoides, A. Gr. Pl. Wright. 11. p. 79; Bot. Mag. t. 5155. 
Grindeliopsis gymnospermoides, Schz. Bip. in Bonplandia, 1858, p. 356, nomen tantum. 
Giinthera viscosa, Regel, Gartenflora, 1858, p. 44. 
Arimzona.—Norta Mexico, San Pedro, Sonora (Wright), Camp Crittenden (Roth- 
rock). . Hb. Kew. 
7. Xanthocephalum humile, Schz. Bip. in herb. Liebm. 
Xanthocoma humilis, H. B. K. Nov. Gen, et Sp. iv. p. 310, t. 412. 
Nort Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 525) ; 
Sours Mexico, valley of Mexico (Bourgeau, 163 ; Schaffner), without localities (Graham, 
Aschenborn). Tb. Kew. 
8. Xanthocephalum sericocarpum, A. Gr. in Proc. Am. Acad. xv. p. 31. 
Nort Mexico, near San Luis Potosi (Parry & Palmer, Schaffner). Hb. Kew. 
9. Xanthocephalum suffruticosum, DC. Prodr. vi. p. 44. 
Sourn Mexico, around the city of Mexico (Berlandier). 
Dr. A. Gray thinks this may be'the same as X. centauroides. 
34, GUTIERREZIA. | 
Gutierrezia, Lag. Elench. Hort. Matr. Gen. et Sp. Nov. p. 30; Benth. et Hook. Gen. Plant. i. 
p- 250. | 
Brachyris, Nutt. Gen. Pl. N. Am. 11. p. 168. 
Brachyachyris, Spreng. Syst. iii. p. 574. 
A genus of about twenty herbaceous and half-shrubby species, inhabiting North 
America, including Mexico, and Extratropical South America. 
1. Gutierrezia berlandieri, A. Gr. in Proc. Am. Acad. xv. p. 31. 
Norra Mexico, region of San Luis Potosi (Berlandier, 1298; Parry & Palmer, 367, 
370), Tamaulipas (Berlandier, 926, 2316), near Saltillo (Gregg, 538). Hb. Kew. 
9. Gutierrezia coulteri, Hemsley, Diag. Pl. Nov. pars altera, p. 33. 
Herba annua (?), erecta, stricta, ultrapedalis, glabra, caule ramisque graculimis, suleatis. Folia 
pauca, sparsa, coriacea, linearia, 2-6 lin. longa, obtusa, margine involuta. Capitula solitaria, 
terminalia, pedunculata, circiter 6-8 lin. diametro ; involucri bractew ovato-oblonge, scariose ; 
receptaculum conicum, foveolatum. Flores radii circiter 12 (achenio incluso), circiter 3 lin. longi, 
disci 14 lin. longi; pappi pale breviuscule, fisse. Achenia pubescentia. 
SoutH Mexico, Zimapan (Coulter, 264). Hb. Kew. 
