THE YUCCEAE. 97 



Two fairly distinct morphological and geographically sep- 

 arate forms of this species, which appears to be the " palma 

 loca " (scattered palm) of the Mexicans, are found, and 

 these may be separated as follows : 



Leaves long and slender. Flowers rather small. T. Treculeana. 



Leaves broader. Flowers larger. var. canaliculata. 



Y. TRECULEANA Carriere. 



Synonymy as above. 



The long- and slender-leaved small tree of the Texas 

 region, from New Braunfels west to beyond Devil's river 

 and south to about Torreon, Mexico. Plates 52. 84, f .8. 



Y. Treculeana canaliculata (Hooker) Trelease. 



Y. canaliculata Hooker, Bot. Mag. iii. 16. pi. 5201. (I860). Baker, 



Gard. Chron. 1870: 1217. Engelmann, Trans. Acad. St. Louis. 



8 : 43. Garden. 1 : 152. 8 : 134. Watson, Proc. Amer. Acad. 



14:252. 



T. canaliculata pendula Koch, Belg. Hort. 1862 : 131. 

 T. recurvata Hort, in part. 

 T. revoluta Hort. 



r. undulata Koch, Belg. Hort. 12 : 132. (1862). 

 r. Treculeana undulata Hort. 



The broader-leaved plant of the chapparal of the coast 

 region from about Corpus Christi, Tex., to the vicinity of 

 Tampico, Mex., and, in the foot hills, to about Monterey, 

 Mex. Plates 53. 54. 



The descriptive garden synonyms of both species and 

 variety apparently pertain to young plants. In two trade 

 lists, issued respectively in September 1901, and January 

 1902, Mr. Carl Sprenger of Naples includes the names 

 Y. Treculeana glauca and Y. Treculeana undulata, 

 but without indication of the characters of the plants, 

 so that it is possible here merely to call attention to them. 

 The second name probably refers to the form called Y. 

 undulata by Koch. 



222. Leaves with conspicuous marginal fibers. 

 3. Leaves thin and flexible, the fibers slender. 

 7 



