90 MISSOURI BOTANICAL GARDEN. 
Though early introduced into European gardens, this 
striking plant still remains among the little-known species. 
Specimens which are still small occur in the living collections - 
of the Missouri Botanical Garden, recorded as from Engel- 
mann, and from these it is impossible to distinguish other - 
specimens distributed from Lampazos, Nuevo Leon, by Mrs. 
Anna B. Nickels, under the name A. Noah. 
AGAVE PARRASANA Berger, Notizblatt Bot. Gart. Berlin. 
4: 250. 1906. 
Aspect and thinness of leaf of A. Wislizeni, but the leaves of a 
clearer green overlaid with thin bloom, more acuminate—sometimes 
long-attenuate, and with the rather heavier prickles widened onto the 
tops of more or less developed fleshy prominences, Flowers? Cap- 
sules stoutly oblong, about 20 X 50 mm.: seeds? 
North-central Mexico.—Pl. 80, 81. 
Specimens examined :—Coaunuvl a. Sierra de Parras (Pur- 
pus, 1905,—the type, and capsules). 
In the region of A. Wislizeni: remarkably variable in 
leaf form. Capsules and seeds from the type locality of this, 
received from Dr. Purpus in December 1911, are scarcely 
distinguishable from those of Wislizeni. 
Agave chihuahuana Trelease. 
Aspect of A. Wislizeni. Leaves thicker, essentially smooth, light 
gray-green, broadly lance-oblong or ovate-oblong, acuminate, openly 
concave, dorsally somewhat valleculate, 10-15 15-25 em., stiffly 
erect-spreading: spine nearly straight, purplish chestnut or somewhat 
slate-colored, graying in age, at first glossy, 4-7 < 25-35 mm., round- 
or flat-grooved nearly to the end, decurrent for about its own length: 
prickles 15-25 mm. apart, about 6 mm. long, mostly somewhat re- 
trorse or gently recurved, triangular from dull ashen lenticular bases. 
Inflorescence paniculate; pedicels from very short to about 10 mm. 
long. Flowers yellow, 65-70 mm. long: ovary 35 mm. long, fusiform; 
tube conical, 10-15 mm. deep: segments 5 X 15-20 mm., longer than 
the tube, half as long as the ovary: filaments inserted about the 
upper fourth of the tube, 45-60 mm. long and about thrice as long as 
the segments. Capsules narrowly pyriform-oblong, 15 55-65 mm., 
thickly stipitate, beaked: seeds dull and rather small, 4<6 mm. 
North-central Mexico.—PI. 82, 83. 
Specimens examined:—Cuinuanva. Hills.near Chihua- 
hua (Pringle, 958, 1886,—the type, distributed as A. Wis- 
