1 &£> 
— 32 — 
ened at the apex, interior shorter, broader and thinner; nectarif¬ 
erous part of tube, below the insertion of the stamens 2§~3 lines 
long, a little longer than upper part of tube ; exsert part of fila¬ 
ments about the length of perigon, anthers 8 lines long ; capsules 
slender, 18-24 lines long, 7-8 wide ; seeds among the smallest of 
this section 2\ lines in the longest diameter, easily distinguished 
by the minute tubercles, 0.01 line wide, which, different from 
other Agave seeds, cover the surface. 
16. Agave Wislizeni : acaulis ; foliis ovatis supra basin paulo 
angustatis medio latissimis acutis, spinas subflexuosae supra late 
exaratae margine acutiusculo decurrente, dentibus rigidis atro- 
fuscis superioribus majoribus distantibus rectis, inferioribus 
parvis confertis subdeflexis; panicula laxifiora; ovario perigo- 
nium et tubo lobo-s fere aequante, staminibus ultra medium tubo 
adnatis longe exsertis ; capsula gracili prismatica utrumque acuta 
nec stipitata, areolis seminum planis punctulatis. — A. scabra , 
Salm, Bonpl. 7, 89; Jacobi, Ag. 88. 
This interesting species was discovered by Dr. A. Wislizenus 
on the celebrated march of Doniphan’s corps through Northern 
Mexico, on the Nazas River near San Sebastiano, in the south¬ 
east corner of the State of Chihuahua, not far east of Parras, May 
10, 1847, in fl. and fr. Living shoots were sent by me to Prince 
Salm and seeds to different European correspondents, among 
others to Prof. A. Braun of Freiburg. Two years later Gen. v. 
Jacobi obtained some of the young plants raised from these seeds 
in the botanic garden of that university and afterwards commu¬ 
nicated them to Prince Salm, who described them (1858) under 
the inappropriate name' A. scabra , though, as the General ex¬ 
pressly states, they are perfectly smooth on both sides.* As thus 
the published name is inadmissible, I deem it proper to substitute 
for it that of the discoverer of this and so many other interesting 
plants of Northern Mexico. 
Jacobi describes his specimens (then 16 years old, and, as he 
thinks, full grown) as 8 inches high and 15 in diameter, rosulate 
and somewhat squarrose, with broad, nearly rhombic and almost 
flat leaves, 5 inches long, 3f wide, pale grayish-green, teeth distant 
* Agave asperrima , Jacobi, is one of the few rough ones, and the only hairy one known, 
I believe, is A. pubescens, lately described by Regel. This species, obtained from Mexico 
and flowered at St. Petersburg, is one of the smaller ones and seems to belong to the first 
copyright reserved 
M 1 S SOU 
Botanic 
G A R D I 
