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AGAVES OF THE UNITED STATES. 67 
TERRACIANO, 
Conspectus sectionum ac subsectionum. 
Agave. 
I. Aplagave, Terr. 
A) Singuliflorae, Engelm. 
a) Herbaceae, Terr. 
b) Spicatae, Terr. 
\ ce) Canaliculatae, Terr. 
B) Geminiflorae, Engelm. 
d) Emarginatae, Terr. 
{ 1. Yuccaefoliae, Baker. 
I. 2. Striatae, Terr. 
3. Filiferae, Baker. 
4, Attenuatae, Baker. 
IL 5. Aloideae, Terr. 
6. Aculeatae, Terr. 
e) Marginatae, Baker. 
II. Cladagave, Terr. 
C) Paniculiflorae, Terr. 
f) Americanae, Terr. 
7. Integrifoliae, Baker. 
8. Americanae, Baker. 
9. Rigidae, Terr. 
10. Viviparae, Baker. 
g) Submarginatae, Baker. 
BAKER. 
Key to genera founded on inflorescence :— 
Euagave, Baker. 
Littaea (Tagl.). 
Manfreda (Salisb.). 
Key to Series and Groups founded on the shape, size and texture of the 
leaves :— 
Series I. Coriaceo-carnosae. 
Group 1. Filiferae. 
2. Marginatae. 
3. Submarginatae. 
4. Americanae. 
’ 6. Rigidae. 
6. Striatae. 
7. Integrifoliae. 
