Refugium Botanicum. } (dpril, 1870, 
TAB. 215. 
Natural Order AMARYLLIDACER. 
Tribe AGAVE. 
Genus AGaAvE, Linn. 
A. untvirrtata (Haworth, Phil. Mag. x. 414). Acaulis, foliis 50-—60 
dense rosulatis lineari-spathulatis strictis sesquipedalibus rigide 
mucronatis margine distincte corneis spinis uncinatis validis pre- 
_ditis, facie extrorsum planiusculis perviridibus linea flava mediana 
percursis, dorso convexis, basi cite dilatatis, scapo (spica inclusa) 
15—16-pedali, bracteis filiformibus floribus sequantibus, floribus 
flavo-viridibus geminatis yel ternis breviter pedicellatis, tubo cylin- 
draceo supra ovarium haud constricto, filamentis limbi segmentis 
duplo longioribus.— Kunth, Enum. v. 835 ; Jacobi, Hamb. Garten- 
ret. xx. 544, 
A native of Mexico. 
Not at all caulescent. Leaves fifty to sixty in a dense rosette, 
rigid, linear-spathulate, dark green when young, marked down 
the face with a broad yellow band which fades as they mature, 
the fully-developed ones eighteen to twenty-one inches long by 
two and a quarter to two and a half inches broad three-quarters 
of the way up, the point a strong pungent brown spine, the edge 
with a distinct horny border furnished at intervals of six to 
eighteen lines with strong hooked reddish brown or finally gray 
spines of the same texture, the face flat except towards the base, 
the back convex, the upper ones erect, about half.an inch thick 
in the centre of the blade, but double that at the base, the lower 
ones spreading horizontally. Scape in the specimen drawn four 
feet high exclusive of the spike. Spike eleven to twelve feet long, 
six to seven inches thick when the flowers are expanded. DBracts 
filiform, equalling the expanded flowers. Flowers two or three 
together on very short peduncles. Perianth an inch and a half 
long, the tube two-thirds of this, cylindrical, not at all con- 
stricted above the ovary, the divisions of the lmb lanceolate, 
greenish yellow. Jilaments twice as long as the segments. 
Tab. 215.—1, whole plant, much reduced; 2, apex of leaf; 3, cluster 
of flowers: both natural size. 4, pair of flowers; 5, stamen; 6, horizontal 
section of ovary: all magnified.—J. G. B. 
