AGAVE. 165 



Group 4. Americans. Edge of the leaf without any continuous 

 horny border below the tip ; marginal teeth large, with the 

 edge repand between them. 



Leaves oblong-spathulate . . Sp. 35-45. 

 Leaves oblanceolate-spathulate. 



Grandifoliae .... Sp. 46-53. 



Parvifohse .... Sp. 54-60. 



Group 5. KiGiD^. Edge of the leaf without any continuous 

 horny border below the tip ; teeth small, with the edge not 

 repand between them. 



Leaves oblong-spathulate . . Sp. 61-64. 

 Leaves oblanceolate or ensiform . Sp. 65-75. 



Group 6. Striata. Edge of the leaf minutely serrulate ; surfaces 

 strongly ribbed Sp. 76-79. 



Group 7. Integrifolije. Edge of the leaf entire ; surfaces not 

 ribbed Sp. 80-82. 



Series II. Oarnoso-coriace^. Leaves persistent, more fleshy and 

 less rigid than in the last series ; end- spine smaller and less 

 pungent. 



Group 8. Geminiflor^. Edge of the leaf splitting off into 

 threads Sp. 83. 



Group 9. Aloide^. Edge of the leaf furnished with small dis- 

 tinct horny teeth. 



Leaves oblong-spathulate . . Sp. 84-92. 

 Leaves oblanceolate or ensiform. 



Grandifoli^ .... Sp. 93-103. 



Parvifohse . . . . Sp. 104-113. 



Group 10. Serrulate. Edge of leaf minutely serrulate. 



Sp. 114-115. 



Group 11. Attenuate. Edge of leaf entire. Sp. 116-117. 



Series III. Flexiles. Leaves persistent, but thinner and more 

 flexible than in the two previous series. End-spine small, 

 scarcely pungent. 



Group 12. ViviPARiE. Leaves distinctly toothed. 



Leaves linear-ensiform . . Sp. 118-119. 



Leaves lanceolate . . . Sp. 120-123. 



Leaves oblanceolate-oblong . . Sp. 124-125. 



Group 13. Yucc^FOLi^. Leaves subentire or obscurely serrulate 



Sp. 126. 



