396 PROCEEDINGS OP THE AMERICAN ACADEMY 



XXI. 



CONTRIBUTIONS TO AMERICAN BOTANY. 

 By Sereno Watson. 



Communicated April 13, 1887. 



1. List of Plants collected by Dr. Edward Palmer in the 



State of Jalisco, Mexico, in 1886. 



Dr. Palmer's collection of the last year was made at certain limited 

 localities within the State of Jalisco, Mexico, at no great distance 

 from Guadalajara, the capital. These localities as indicated by him 

 were as follows: — Guadalajara, in N. lat. 20° 41', about 270 miles 

 north of west of the city of Mexico, at an altitude of 5,167 feet ; Rio 

 Blanco, the principal station, at which fully one half of the species 

 were collected, ten miles west by north of Guadalajara, a valley with 

 a range of low mountains on the east called the Cerro de San Estevan, 

 which are broken by narrow valleys and deep canons, and covered 

 with a scattered growth of ])\u.qs, and scrub oaks ; " Barranca," a 

 caiion nine miles east by north from Guadalajara, with towei'ing 

 rocky sides, where is the hacienda of Senor Portillo, and a ferry 

 over the Rio Grande known as the Paso de Ybarra ; Tequila, twenty 

 miles northwest of Guadalajara, in a deep volcanic depression sur- 

 rounded by more or less barren mountains ; and Chapala, thirty miles 

 southeast of Guadalajara, on the lake of the same name, among low 

 barren mountains. 



Of these points Tequila proves to have been the richest compara- 

 tively in novelties, after which come Barranca and Rio Blanco, 

 Guadalajara being the poorest though still yielding nearly ten per 

 cent of new species. The whole collection includes about 675 

 species. 



The dates of the collections are, at Guadalajara, July to October ; 

 at Rio Blanco, June to October ; at Barranca, June ; at Tequila, 

 August 25th to September 5th ; and at Chapala, October 27th to 

 November 3d. 



