114 MISSOURI BOTANICAL GARDEN. 



yuccoid genera, the following, mostly spurious, Yuccas are 



to be accounted for : 



Y. acaulis HBK. Nov. Gen. Sp. 1 :289. (1815). 



Said by Engelmann (Trans. Acad. St. Louis. 3 : 55) to be a Fourcroya, 

 and by Baker (Joum. Linn. Soc. Bot. 18 : 231) to consist of leaves of an 

 Agave or Fourcroya and flowers of a Yucca. It is said by the describer to 

 be called locally "maguay de Cocuy," and to occur abundantly near Car- 

 acas and Cumana. The ovary is said to be superior, but the filaments are 

 described as dilated at base and the flowers are particularly compared 

 with those of Agave Cubensis ( now called Furcraea Cubensis) which Hum- 

 boldt elsewhere (Pol. Essay on the Kingdom of New Spain. 2 :472. ed. 

 3. transl. by Black) states is called "maguey de Cocuy" in the provinces 

 of Caracas and Cumana, so that it is doubtless F. yeminispina Jacobi, 

 which has the marginal prickles bifid, as those of Y. acaulis are said to be. 

 1'. acrotricha Schiede, Linnaea. 4 : 230. (1829). 



Briefly described from foliage specimens only, and subsequently and 

 correctly named Dasylirion acrotricha by Zuccarini (PI. Nov. v. min. cogn. 

 4 : 223, 228.pl. 1). 

 1'. aletriformis Haworth, Phil. Mag. 1831 : 415. South Africa. 



Obviously, from the locality, if correctly given, not a Yucca, but as yet, 

 so far as I know, unplaced. 

 Y. angustifolia Karwinsky in Sweet, Hort. Brit. 707. (1839). [ed. 3]. 



Is Y. stenophylla Steudel, mentioned below. 

 I". Barrancasecca Pasquale, Cat. R. Orto Bot. di Napoli. 108. (1867). 



From the statement that the leaves are fibrillate at end, it may be in- 

 ferred that this plant, cultivated in the Naples garden, is a Dasylirion, 

 but its leaves, which are described as 1 meter long and 3 to 4 cm. wide, 

 and by implication entire, are large and differ in their fibrillate end from 

 those of the described species of that genus with entire leaves. 

 y. Boscii Desfontaines, Tableau de 1'Ecole de Bot. du Jard. du Boi. 

 28, 274. (1815). [ed. 2]. 



This catalogue name, without description and doubtfully placed 

 under the genus Yucca by its author, is now by general consent referred 

 as a synonym to Agave geminiflora Gawler. Nuttall (Trans. Amer. Phil. 

 Soc. 5 : 156), refers to it as from Upper Carolina, 

 y. graminifolia Zuccarini, Cat. Hort. Monac. 1837. 



Referred to the genus Dasylirion under the same specific name by 

 Zuccarini (Allgem. Gartenzeit. 1838. Plant, nov. vel min. cogn. 4: 

 225. pl.l. Neumann, Rev. Hort. ii. 4:250). I am indebted to Pro- 

 fessor Radlkofer for bits of the type from Zuccarini's herbarium, at 

 Munich, 

 y. horrida Steudel, Nomenclator. 2: 795. (1841). [ed. 2]. 



Mentioned by name only, ascribed to Humboldt, and stated to be a 

 synonym of Y. spinosa, which is referred to below. 



