162 PROCEEDINGS OP THE AMERICAN ACADEMY 



Agave revoluta, Klotzsch (?) At Saltillo, Coahuila (1307). 

 Much resembling the last, but the leaves more undulate and not at 

 all serrulate, and the tube of the perianth somewhat longer and 

 narrower. 



Agave asperrima, Jacobi. Acaulescent: leaves few, narrowly 

 oblanceolate and long-acuminate, 2 feet long by 3 or 4 inches wide, 

 channelled, glaucous and rough, terminating in a slightly decurrent 

 brown slender spine 1^ to 3 inches long, and with broad brown spines 

 upon the fleshy margin, 4 to 8 lines long, reflexed and often variously 

 curved : flowers numerous, panicled ; ovary linear, 9 lines long ; 

 perianth-tube 6 lines long, with the stamens inserted on the middle ; 

 segments 10 lines long: filaments about 2 inches long: capsule ses- 

 sile, oblong, 1| to 2 inches long: seeds smooth, 3 lines long. — At 

 San Lorenzo de Laguna, Coahuila (1309), and in cultivation at Cam- 

 bridge. Of the A. Americana group, and remarkable for its rough 

 glaucous leaves and very long spines. The species has been referred 

 by Baker to A. Salmiana, but proves to be very distinct. Seeds have 

 been distributed by Dr. Engelmann under the name A. loiigispina. 



Agave Wislizeni, Engelm. In the Caracol Mountains, southeast 

 of Monclova, Coahuila (1310). 



Agave Americana, Linn. At Monclova, Coahuila (1313). 



Agave (?) Flowers only, in a large panicle: ovary an 



inch long or more: perianth 18 lines long above the ovary, very 

 fleshy, the broad tube about 4 lines long, and the very stout filaments 

 (3 inches long) adnate over two thirds of its length. — At Saltillo 

 (1308). 



Agave falcata, Engelm. Leaves numerous, a foot long, very 

 rigid, falcate, sharply serrulate, the terminal spine 1 to IJ inches 

 long : flowering stem 5 feet high ; flowers as described : capsule 6 

 lines long, deeply channelled on the sides, coarsely striate, tardily de- 

 hiscent: seeds U- to 2 lines long. — At Parras, Coahuila (1314). 



Agave bracteosa, Watson ; Engelm. in Gard. Chron. 2. 18. 776, 

 figs. 138, 139. Acaulescent, with narrow fleshy minutely serrulate 

 leaves, 1 1 to 2 feet long, attenuate from near the base to an herba- 

 ceous tip : flowering stem 3 feet high, covered with numerous recurved 

 subulate-filiform bracts, 4 to 6 inches long or more : flowers in pairs 

 in a very dense spike, subtended by short membranous bracts ; ovary 

 and perianth each 6 lines long, the latter divided very nearly to the 

 base: filaments 2 inches long: capsules oblong, 6 lines long. — On 

 mountain cliffs fifteen miles from Monterey, Nuevo Leon (Palmer) ; 

 in cultivation at Cambridge. 



