106 MISSOURI BOTANICAL GARDEN. 
is really Furcraea Bedinghausii, a species which also’ 
possesses a number of other generic as well as specific 
synonyms. 
In his synopsis of Aloineae and Yuccoideae, Mr. Baker,* 
recognizes the Yucca baccata australis of Engelmann, with 
Y. filiferaas asynonym, treating his own periculosa, circin- 
ata, scabrifolia and fragilifolia as separate varieties of Y. 
baccata, and adding to this species another garden variety, 
under the name Hystrix, while he places his Y. polyphylla 
as a synonym under what is here called Y. radiosa. 
Since the publication of the papers referred to, knowl- 
edge of this tree has increased greatly, and there can no 
longer be any doubt as to its specific separability from both 
Y. baccata and Y. marcocarpa (Torrey), and although it 
is unfortunate that an established name is displaced there- 
by, there is no reason why the tree should not be designated 
by the name australis which Dr. Engelmann first applied 
to it varietally, unless one of Mr. Baker’s provisional 
names, — all of which refer to plants still unknown in a 
wild state and comparable with immature forms of other 
species, — should ultimately prove, contrary to his own 
opinion, to refer to the same plant, in which case it ante- 
dates this name of Engelmann. 
Yucca australis, as here understood, forms large forests 
in the valleys about Monterey, and is especially abundant 
immediately to the north of that city between Chipinque and 
Topo Grande, and though there are many breaks, these 
forests continue in open places along the Mexican National 
railroad to the vicinity of San Luis Potosi, and even as far 
south as the vicinity of the city of Mexico some trees occur. 
On the Mexican Central railroad it is seen, accompanied by 
Y. Treculeana and Y. rigida in varying quantity,about La 
Mancha and thence south to about Symon. For the sake 
of verification, Parras was visited, and it may be said that 
Thurber’s material certainly represents the tree that is com- 
* Journ. Linn. Soc. Bot. 18; 229. (1880). 
