156 PROCEEDINGS OF THE AMERICAN ACADEMY 



QuERCUS DuRANDi, Buckley. At Sutherland Springs (1275). 



QuEiicus STELLATA, Willd. At Georgetown, Texas (1281). 



QuERCUS NIGRA, Liun. Same locality (1282). 



QuERCUS cocciNEA, Wang. At Sutherland Springs (1283), and 

 Georgetown, Texas (1284). 



QuERCUs MACROCARPA, Michx. At Georgetown, Texas (1285). 



QuERCUS GRiSEA, Llebm. In the Sierra Madre, south of Saltillo 

 (1278), — a small tree, twenty feet high and rarely over a foot in 

 diameter. 



QuERCUS CASTANEA, Nee (?), — foliage only. At Guanajuato 

 (Duges) ; 839 Parry & Palmer, a variety. 



QuEHCLS ? Resembling forms of Q. castanea, but with thin- 

 ner acuminate leaves, sparingly stellate-tomentose, the slender pedicel 

 and the thin turbinate-campanulate cup hoary-tomentose. In the 

 Sierra Madi-e, south of Saltillo (1277). "Red Oak"; often thirty or 

 forty feet high. 



QuERCUS CRASSIFOLIA, Humb. & Bonpl. In the San Miguelito 

 Mountains, San Luis Potosi (897 Schaffner) ; 836 Parry & Palmer. 



QuERCUS RETICULATA, Ilumb. & Bonpl. (?), — foliage only. Mount- 

 ains near San Luis Potosi (896, 898 Schaffner), and at Guanajuato 

 (Duges). Some of the leaves are over a foot long and 8 inches 

 wide. 



QuERCUS TOMENTOSA, Willd. (?), — foliage only. Mountains near 

 San Luis Potosi (899 Schaffner). 



QuERCUS CONFERTIFOLIA, Ilumb. & Bonpl. In the Santa Rosa 

 Mountains, Guanajuato (Duges). 



Salix BoNi'LANDiANA, HBK. In the mountains east of Saltillo 

 (1286), and about San Luis Potosi (895 Schaffner). 



Salix taxieolia, HBK. At Morales, San Luis Potosi (893 

 Schaffner) ; 840 Parry & Palmer. 



Salix ? In the San Miguelito Mountains, San Luis Potosi 



(894 Schaffner). A well-marked and apparently very distinct species. 

 Hoary-toineutose, the leaves glabrate above, narrowly lanceolate, acute, 

 cuneate at base, irregularly and rather bluntly serrulate, 2 to 4 inches 

 long ; petioles 2 to 4 lines long : pistillate aments appearing after the 

 leaves, sessile, dense, very short (6 lines lung or less) ; bracts very 

 densely villous : ovary glabrous or nearly so. 



Populus alba, Linn. ; a variety with ovate-orbicular or subreni- 

 form-ovate leaves, sparingly sinuate or entire. At San Luis Potosi, 

 in cultivated grounds (892 Schaffner) ; 8421 Parry & Palmer. 842 

 Parry & Palmer is P. nigra, Linn. 



