THE YUCCEAE. 109 



Y. auxtralis to the eastward in the same latitude and alti- 

 tude, some of the short main trunks measuring fully 2 

 meters in diameter. 



So far as I can see, this species, which differs from 



Y. australis chiefly in having its panicles continuous in 

 direction with the branches that bear them, and hence 

 either erect, oblique or horizontal, is the same as that 

 described from Lower California under the name Y. valida 

 by Mr. Brandegee, who has kindly allowed me to see his 

 type material of that species ; and if so its range crosses 

 both the Sierra Madre mountains and the Gulf of Califor- 

 nia, though I do not know that it has been collected in the 

 intervening state of Sinaloa. Because of the curly threads 

 on its leaf margin, it is known as the palma china, or 

 curly Yucca, and toward San Luis Potosi it is associated 

 with the palma samandoca ( Y. australis}, which appears 

 to be entirely absent from the highlands of Zacatecas, 

 though it replaces Y. valida to the east of the city of San 

 Luis Potosi. 



444. Leaves large, very coarsely filiferous, the back very scabrous 

 except in the last. 



Y. BACCATA Torrey, Bot. Bound. 221. (1859). Baker, 

 Gard. Chron. 1870 : 923. Journ. Linn. Soc. Bot. 

 18 : 229. Engelmann, Bot. King. 496. Trans. Acad. 

 St. Louis. 3:44. Andr(S, Rev. Hort. 59 : 368. /. 

 73, 75. Watson, Proc. Amer. Acad. 14:252. 

 Coulter, Contr. U. S. Natl. Herb. 2 : 436. Havard, 

 Proc. U. S. Natl. Mus. 1885 : 516. Bull. Torrey Bot. 

 1. 22 : 119. 23: 37. Coville, Contr. U. S. Natl. 

 Herb. 4: 202. Merriam, N. A. Fauna. 7: 352. pi. 

 12. Gard. Chron. iii. 28: 103. /. 27. Garden, 

 16 : 516. /. 35 : 585. /. 55 : 81. /. Britton & 

 Brown, 111. Fl. 1 : 426. /. 1025. ? Kept. U. S. 

 Dept. Agr. 1870 : 418. pi. 25. Belg. Hort. 3O : 

 266. 111. Hort. 2O : 23. pi. 115. 

 Low, usually from a stout prostrate short-branched caudex. Leaves 



rigidly spreading, bluish green, about .6 m. long and 50 mm. wide, con- 



