158 COULTER AND ROSE 



38. PEUCEDANUM L. Sp. PI. i: 245. 1753. 

 A very large and polymorphic genus of wide distribution, and rep- 

 resented in Western United States by a peculiar group of numerous 

 species, and perhaps to be excluded from Mexico, but retained here to 

 include P. toliicense^ cited below, whose generic relationships are 

 doubtful, and also P. 77iadrense Watson, a still more uncertain species. 

 Hemsley includes eight species, three oE which bear names. Of the 

 named species P. fievadense Wats, is included upon the authority of 

 the Botany of California^ but no collections have verified this state- 

 ment ; P. mexicamiDi Wats, proves to be a Prio7tosciaduim ; and P. 

 tolucejise Hemsley is referred to above. The five unnamed species 

 have been variously referred, chiefly to Prionosciadium. 



Peucedanum tolucense (H.B.K.) Hemsley, Biol. Centr.-Am. Bot. I : 

 570. iSSi. 



Ferula tohicenns H.B.K. Nov. Gen. et Sp. 5: 12. pi. 418. 1821. 

 State of Mexico : Sierra de las Cruces, altitude 3600 meters, Pringle 



5953' October 7, 1895. 

 Hidalgo : Sierra de Pachuca, altitude 2940 meters, Pringle 7650, 



August 13, 1898. 



39. DAUCUS L. Sp. PI. I : 242. 1753. 

 A genus of wide distribution, two of which, D. montanus Willd. 

 and D. pusillus Michx., are natives of Mexico and Central America. 

 In addition to these, D. carota L. has become somewhat naturalized. 

 In Hemsley's enumeration these three are given, but his fourth species, 

 D. brachiatus, becomes Caucalis microcarpa Hook. & Arn. 

 Daucus montanus Humb. & Bonp. in Schult. Syst. 6: 482. 1820. 



Chihuahua: in the Sierra Madre, Nelson 4791, August 20, 1898; 



same region, E. A. Goldnian 166, September 26, 1898. 

 State of Mexico: El Desierto Viejo, Altamiratto 26, July 1890; 



Sierra del Pino, Altaniirano i, September 1890. 

 Tepic: near Santa Teresa, Rose 2126, August 8, 1897. 

 Puebla : liuanchinango, E. A. Goldjuajt 21, January 8, 1898. 

 Chiapas: above San Cristobal, altitude 2100-2640 meters, N'elson 



3183, 3236, September iS-22, 1895; about Tumbala, altitude 



1200-1650 meters. Nelson 3340, October 20-29, 1895. 

 Guatemala : mountains near Hacienda of Chancol, altitude 3300 



meters, Nelson 3665, January 2, 1896. 

 Costa Rica: altitude 1500 meters, Pitticr 6969, August 27, 1892. 



Introduced Genera and Species. 



The following introduced species have come under our observation. 



Apium graveolens L. Sp. PI. i : 264. 1753. 



Puebla : in roadside ditches near the city of Puebla, Pringle 5956, 

 December 17, 1895. 



