OF ARTS AND SCIENCES. 351 



piniiK! 1 or rarely 2 pairs upon a rhachis 2 to 12 lines long*, leaflets 2 

 to 5 pairs, oblong to oblong-obovate, 3 to 4 lines long: peduncles 

 fascicled, an inch long : calyi glabrous, 1 to nearly 2 lines long, exceed- 

 ing the narrow deciduous bracllet: ovary glabrous, stipitate. — In the 

 Sierra Madre south of Saltillo (298). Allied to A. Rcemeriana and 

 A, micrantha. 



Acacia flexicaulis, Benth. At Corpus Christi Bay, Texas 

 (305). Pinnas always 2 pairs: spikes longer than in the next species 

 and pedunculate: pod sessile upon a much-thickened branch-like 

 peduncle. 



Acacia amentacea, DC. Between the Rio Frio and Nueces, 

 Texas (304); 213 Parry &, Palmer. Pinnae a single pair: spikes 

 short and sessile: pod 2 or 3 inches long by 2 lines wide, attenuate 

 into a stipe : spines very variable, sometimes sliort, often 1 to 2 inches 

 long or more. Young fruit has recently been collected for the first 

 time by Dr. V. Havard, U.S.A., and Dr. S. B. Buckley. This is said 

 to be the most common species in Southwestern Texas, and to grow 

 to a height of twenty feet. 



Acacia Wrigiitit, Benth. At Uvalde, Texas (303). 



Acacia Berlandieri, Benth. At Eagle Pass, Texas (2127), at 

 JMonterey, Nuevo Leon (308), and in the mountains east of Saltillo 

 (309). A variety was collected at Eagle Pass (2127, in part) with 

 narrower pods (6 to 8 lines wide) and smaller seeds (3 or 4 lines long). 

 The ordinary form has the pod 9 to 14 lines broad and the seeds 5 or 

 6 lines long. 



Acacia constricta, Benth. At Parras, Coahuila (313), and in 

 the mountains near Los Pogos (627 Schaffner) ; 214 Parry & 

 Palmer. 



Acacia filicina, Willd. At Parras (311), Juraz (310), and in 

 the Caracol IMountains, Coahuila (2128), and at Sutherland Springs, 

 Texas; 218 Parry & Palmer.- 



Acacia Farnesiana, Willd. In the Sierra Madre south of Sal- 

 tillo (312). Known by the Mexicans as " Huisache." 



Acacia crassifolia, Gray. At San Lorenzo de Laguna, Coahuila 

 (284). The pod is very thick and coriaceous, 3 inches long by 8 lines 

 broad, nearly annular and shortly stipitate 



Calltandra conferta, Benth., but with slender peduncles. In 

 the mountains east of Saltillo (318), and in the Morales Mountains 

 (G2G Schaffner). 



Calliandra eriophtlla, Benth., but with the fruiting peduncles 

 short. At Saltillo, sparingly collected; the same as 212 Parry & 



