THE YUCCEAE. 103 
the inflorescence is typically glabrous; and fruit-bases and 
seeds show that the fruit is baccate. 
If, as now seems more probable than ever, the Torrey 
sheet of Y. brevifolia contains parts of two species, Schott’s 
name may best apply to what Dr. Engelmann considered 
the most characteristic part, the leaves, particularly as the 
name Schottit has now become current for the remainder. 
The later Y. brevifolia, Engelmann (1871), as has been 
stated above, is now proposed as the type of the genus Clis- 
toyucca under its first published (varietal ) name arborescens. 
44, Leaves relatively broader, usually smooth. 
Y. austratis (Engelmann) Trelease, Rept. Mo. Bot. 
Gard. 3:162. pl. 3, 4. (1892). 
¥. baccata australis Engelmann, Trans. Acad. St. Louis. 3:44, 46. 
(1873), —in part.— Watson, Proc. Amer. Acad. 14; 252. — Baker, 
Journ. Linn. Soc. Bot. 18 : 229. 
Y. filifera Chabaud, Rev. Hort. 482432. f. 97. (1876). — Carritre, 
Rev. Hort. 56:53. f. 12, 13. —Garden. 103 554. f. — Gard. & For- 
est. 1:78. f. 13, 14.— Baker, Kew Bull. 1892 :8.— Gard. Chron. 
iii. 33743, 751. f. 97, 100. — Amer. Florist. 8 359. f.— Urbina, Cat. 
Pl. Mex. 353. 
Y. canaliculata jilifera Fenzi, Bull. R. Soc. Tosc. di Orticult. 14; 278. 
pl. 9. (1889). 
? Y. periculosa Baker, Gard. Chron. 1870 1088. 
? Y. baccata periculosa Baker, Journ. Linn. Soc. Bot. 18 : 229. 
? Y. polyphylla Baker, Gard. Chron. 1. c. 
? Y. circinata Baker, Gard. Chron. 1. c. 
? Y. baccata circinata Baker, Journ. Linn. Soc. Bot. 18 ; 230. 
? Y. scabrifolia Baker, Gard. Chron. 1. c. 
? Y. baccata scabrifolia Baker, Journ. Linn. Soc. Bot. 18: 230. 
? Y. fragilifolia Baker, Gard. Chron. 10. 
2? Y. baccata fragilifolia Baker, Journ. Linn. Soc. Bot. 18: 230. 
? ¥. baccata Hystrix Baker, Journ. Linn. Soc. Bot. 18 : 230. (1880). 
Y. Treculeana Rose, Contr. U. S. Natl. Herb. 5, pl. 38. 
Dasylirion aloefolium Carriére, Rev. Hort. 18843 53. 
A large thick- and rough-stemmed tree, at length much branched, 
Leaves rigidly spreading, pungently stout pointed, green, usually about 
.3 m. long and 25 mm. wide but occasionally of double these dimensions, 
thick, plano- or concavo-convex, smooth or exceptionally a little scabrid 
on the dorsal angles, somewhat sparingly rather coarsely filiferous. In- 
florescence on an exserted peduncle, oblong, pendent, with pendent 
