OP ARTS AND SCIENCES. 155 



Callitriche verna, Linn. Same locality (123'' Scliaffiier). 



Ulmus crassifolia, Nutt. At San Antonio, Texas (12J9). 



Celtis reticulata, Toit. At Uvalde, Texas (1200). A form 

 with small entire leaves (1 to 1^ inches long), less hispid than usual. 



Celtis Berlandieri, Klotzsch. At Monterey, Nuevo Leon 

 (12G1). Not clearly distinguished from C Mississippiensis, Bosc. 



Celtis pallida, Torr. Eeferred by Planchon to C. Tula, Gill., 

 from which it differs in at least the fine cinereous pubescence and the 

 rou2,h and blunter (usually obtuse) leaves. At Laredo, Texas (159). 



Cannabis sativa, Linn. At Guanajuato (Diigus) ; known as 

 " Marihuana." 



Urtica spirealis, Blume, var. (?) Near U. MageUanica, Poir., 

 but with smaller stipules (linear, 2 lines long), and with smaller and 

 less crowded flowers and fruit. At Guajuco, Nuevo Leon (12G2). 



Urtica urens, Linn. At Corpus Cbristi, Texas (12G4); 833 

 Parry & Palmer. 



Urtica cham^dryoides, Pursh. At Monterey (1265). 



Bceiimeria ctlindrica, Willd. At San Antonio, Texas (1203). 



Parietaria officinalis, Linn. (?) Referred to this species at 

 Kew, but perhaps distinct. At Guajuco, Nuevo Leon (12GG). 



Parietaria Floridana, Nutt. Considered by Weddell as a 

 variety, first of P. debilis, and afterwards of P. Pennsyloanica ; prob- 

 ably distinct from both. In the mountains east of Saltillo (12G7), 

 and in the San Miguelito Mountains, San Luis Potosi (39 Schaffner) ; 

 832 Parry & Palmer. 



Platanl'S Mexicana, Moric. Distinguished from P. racemosa by 

 the shorter and broader lobes of the leaves (densely white-tomentose 

 beneath), and by the larger fruit with the akenes tomentose to the 

 summit. At Monterey, Nuevo Leon (1268) ; 834 Parry & Palmer. 



Platanus Lindeniana, Mart. & Gal. Differinw from the last in 

 the more ferruginous and less persistent tomentum, and in the long- 

 acuminate leaf-lobes. At Monclova, Coahuila (1269); referred to 

 P. racemosa. 



Carya. oliv^formis, Nutt. At Georgetown, Texas (1271, 1272, 

 1273, 200-3) ; 835. V Parry & Palmer (the same number is cited by 

 Hemsley under G. Mexicana^ which should be 83 4i). 



Jug LANS rupestris, Engelm. At Uvalde, Texas (1270). 



JuGLANS nigra, Linn. At Georgetown, Texas (2002). 



QuERCUs viRENS, Ait. At Sutherland Springs (1274), Laredo 

 (1276), Uvalde (1279), and Georgetown, Texas (1280, 2004), and at 

 some locality in Mexico (2003). 



