153 



The following table shows the more recent treatments of this 

 subfamily : 



Various arrangements of Agaveae. 



Bentham and Hooker, 

 1883. 



Pax in Englcr and Prantl, 

 1887. 



Baker, 1888. 



Proposed arrangement, 

 1891). 



I'olianthes. 

 Bravoa. 



Bravoa. 

 PoliantheH. 



Polianthes. 



Prochnyantbes (1887)-.. 

 Bravoa. 



Beschorneria. 

 Doryauthes. 



Prochnyautb.es. 

 (Polianthes. 

 [Bravoa. 



Psendobravoa (below). 

 (Manfreda (I860). 

 \Alibertia (1882). 

 [Leichtlinia (18911). 

 [Delphinoa (1897), 



Agave. 











yManfreda. 









Boachorneria. 

 Doryanthea. 









In the accompanying key Fureraea, Beschorneria, and Doryanthes 

 are omitted, as it is my desire here to bring out the difference between 

 Manfreda and its allies. 



KIT TO MANFBEDA AND RELATED GENERA. 



A. Plantlets forming the first year true bulbs; plants appearing annually from bulbs which 



crown more or less thickened rootstocks; (lying down annually; leans comparatively 

 thin, neither spine-edged nor spine-poin ted ; inflorescence a simple lax raceme or spike ; 

 flowering annually. 



B. Flowers normally in pairs ; perianth always curved; filaments equal, not folded in the 



bud; anthers included. 



C- Perianth not abruptly curred or dilated at the middle; stamens inserted far above the 

 curve in the perianth tube (with some exceptions) ; filaments mostly very short; ovary 

 usually free at the apex. 



Polianthes L. Rkavoa Lluv. & Lex. 



CC. Perianth abruptly dilated and curved at the middle ; stamens inserted below the curve 

 in the perianth tube ; filaments longer than in the last. 



Prochnyanthes Wats. 

 . Hardly to be. distinguished from Polianthes except in the perianth. 



BB. Flowers (normal) always solitary; stamens folded in the bud. 

 D. Stamens included; inflorescence dense. 

 Psendobravoa (Bravoa in small part). 



1)1). Stamens exserted; inflorescence open. 

 Manfreda Salisb. emended (Agave § Manfreda). 



a. Perianth straight. 

 Subgenus Eumanfreda. 



b. Perianth strongly curved. 

 Subgenus Psei'domanfkeda. 

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