168 RUTACEA. 
2. Thamnosma montana, Frem. et Torr. in Fremont, 2nd Report, p-. 313, and 
Bot. Whipple Exped. p. 17, t. 3. 
CaLirornia.—NortH Mexico, Sierra Tula, Sonora (Schott). | 
Tribe ZANTHOXYLEA. 
4, ASTROPHYLLUM. 
Astrophylium, Torr. in Bot. Pope’s Exped., Pacif. R. Rep., ii. p. 161; Benth. et Hook. Gen. Plant. i. 
p. 296. 
The genus is limited to the following shrubby species. 
1, Astrophyllum dumosum, Torr. Bot. Mex. Bound. Surv. p. 42. 
- New Mexico.—Norru Mexico, west slopes of Sierra del Pajarito, Sonora (Schott), 
Chihuahua (Bigelow). Hb. Kew. 
5. CHOISYA. 
Choisya, Kunth, in H. B. K. Nov. Gen. et Sp. vi. p. 4 (Juliana, Llav. et Lex.) ; Benth. et Hook. 
Gen. Plant. 1. p. 297. 
A monotypic shrabby genus. 
1. Choisya ternata, H. B. K. Nov. Gen. et Sp. vi. p. 6, t. 513. 
Nort Mexico, region of San Luis Potosi, 6000 to 8000 feet (Parry & Palmer, 229) ; 
SoutH Mexico, cultivated in and around the city of Mexico, in the mountains above 
Toluca (Andrieux, 477), Las Vegas, Vera Cruz (Linden, 431 ; Galeotti, 1799), Jalacingo 
(Schiede & Deppe), Desierto Viejo (Bourgeau, 1269), Cafiada (Bilimek, 77). Hb. Kew. 
6. ZANTHOXYLON. 
Zanthoxylon, Linn. Gen. Plant. n. 1109; Benth. et Hook. Gen. Plant. i. p. 297. 
A genus of about eighty species of shrubs and trees, distributed over most tropical 
and subtropical countries. 
1. Zanthoxylon affine, H. B. K. Nov. Gen. et Sp. vi. p. 3. 
Soutn Mexico, at Laka Cuiseo, at 5400 feet (Humboldt & Bonpland). 
2. Zanthoxylon ghiesbreghtii, Turcz. in Bull. Soc. Nat. Mosc. 1859, i. p. 274. 
Sourn Mexico, Zacuapan, Vera Cruz (Ghiesbreght, 122 and 225). 
3. Zanthoxylon limoncillo, Planch. et GErst. MSS. in Hb. Kew. 
_ Lanthozxylon pterota, Seem. Bot. Voy. ‘ Herald,’ nec H. B. K. 
Texas.—MExico, without locality (Bates); Panama, Boquete, Volcan de Chiriqui 
(Seemann, 1655). Hb. Kew. 
4, Zanthoxylon melanostictum, Schl. et Ch. in Linnea, v. p. 231. 
MEXICO, without any indication of the locality (Schiede & Deppe). 
