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MISSOURI BOTANICAL GARDEN. 



mainland towards the Isthmus or in the southeast parts of 

 Central America. The only Riofrio shown in European maps 

 of South America is in North Chile. 



Key to the Species of Group B "Giganteae." 



Margin prickles of mature leaf less than two lines long, little curved, 

 spreading. cubensis. 



Margin prickles of mature leaf more than two lines long, strongly uncinate, 

 ascending. 



Leaf at greatest width fairly broad in proportion to its length, 

 (about 1 : 8 or more) . 



Leaf oblong-lanceolate, germen longer than the perianth 

 lobes; juice of leaves not fetid. tuberosa. 

 Leaf obovate-lanceolate, germen equalling or shorter than 

 the perianth lobes; juice of leaf fetid. gigantea. 

 Leaf at greatest width narrow in proportion to its length, (about 

 1 : 10 or less). 



Margin prickles approximate (0-1 in. apart). 

 Neck of leaf gradually narrowed to about 3 in. at the 

 narrowest part. elegans. 

 Neck of leaf constricted to about 2 in. at the narrowest 

 part. Selloa. 

 Margin prickles distant (1-4 in. apart). macrophylla. 



Species Non Satis Notae. 



F. AGAVEPHYLLA, Brotero ex Schultes Syst. Veg. vii. (i.) 

 731 (1829). 



The paper in which this was propounded is shown in the 

 records of the Linnaean Society as received from Felix D'Avel- 

 lar Brotero on the 30th of January, and read the 8th March, 

 1823; it seems to have been made over to the referee, but not 

 printed, and no evidence of its contents is apparently pro- 

 curable beyond the notice in Schultes, to whom presumably 

 a copy of the author's MS. was accessible. The plant is said 

 to have been found in Maranhao, Pernambuco, and other 

 parts of the Brazils, and can hardly have been Jacquin's 

 Cuban "Agave" (F. cubensis, Vent.); indeed Schultes him- 

 self (pt. ii. p. 1717) suggested ultimately that it might be 

 rather "Agave vivipara" of Arruda da Camara, above cited. 

 It is doubtful how far Arruda's " Caroata assu" represents 



