THE YUCCEAE. BI 
the vicinity of Presidio del Norte, Dr. Bigelow is said to 
have found a Yucca 3 to 5 m. high, with leaves almost 
exactly like those of Y. baccata, and longer though not 
thicker fruit, for which Dr. Torrey proposed the name of 
Y. baccata macrocarpa. In 1871, Dr. Engelmann* merged 
this form with Y. baccata, noting that though northward a 
low plant, this species becomes a tree farther south; but in 
his notes on the genus, published two years later,f he 
accords names to two forms of Y. baccata, the typical sub- 
acaulescent, large-flowered and long-styled plant, which he 
calls forma genuina, and the southern branched arborescent 
plant with smaller flowers and shorter style, which he calls 
variety australis, noting that certain California specimens 
are intermediate in foliage between the northern and south- 
ern extremes. 
In discussing the plants collected or studied by the 
Death Valley expedition, Mr. Coville applied the name Y. 
macrocarpa to the baccate tree Yucca of southern Cali- 
fornia and southern Nevada, with the qualification that 
though he had not had an opportunity to investigate the 
identity of this Mohave Desert species with the West 
Texas form to which Dr. Torrey had applied the name 
varietally under Y. baccata, they were supposed to be the 
same; and Dr. Merriam accepted this conclusion in his 
account of the distribution of the tree in the Death Valley 
region. 
On the occasion of the flowering of a Yucca trunk re- 
ceived by the New York Museum of Natural History from 
Sierra Blanca, Texas, Professor Sargent,{ in publishing a 
figure of it, expressed the opinion that the specific name 
macrocarpa should be limited to this tree of western Texas ; 
and the next year§ he proposed for the California plant 
* Bot. King. 496. 
¢ Trans. Acad. Sci. St. Louis. 3 3 44. 
t+ Gard. & Forest. 8 : 301. f. 42. (1895). 
§ Gard. & Forest. 93 104. 
