114 MISSOURI BOTANICAL GARDEN. 
yuccoid genera, the following, mostly spurious, Yuccas are 
to be accounted for: — 
Y. acaulis HBK. Nov. Gen. Sp. 1 3289. (1815). 
Said by Engelmann (Trans. Acad. St. Louis. 8 355) to be a Fourcroya, 
and by Baker (Journ. 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- 
acasandCumana. 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 3472. — ed. 
3. transl. by Black) states is called ‘‘maguey de Cocuy”’ in the provinces 
of Caracas and Cumana, so that it is doubtless F. geminispina Jacobi, 
which has the marginal prickles bifid, as those of Y. acaulis are said to be. 
Y. acrotricha Schiede, Linnaea. 4 : 230. (1829). 
Briefly described from foliage specimens only, and subsequently and 
correctly named Dasylirion acrotricha by Zuccarini (Pl. Nov. v. min. cogn. 
4 : 228, 228. pl. 1). 
Y. 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. 
Y. 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. Bosciit Desfontaines, Tableau de l’Ecole de Bot. du Jard. du Roi. 
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. § 3 156), 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. 1. — 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 bea 
synonym of Y. spinosa, which is referred to below. 
