146 MISSOURI BOTANICAL GARDEN. 
In another part of the present volume I have shown that 
Y. gigantea, which has usually been confounded with Y. 
gloriosa, ike Y. aloifolia sometimes sets fruit without the 
intervention of Pronuba.* 
Y. elata, Trelease, Rept. 4: 193-9. pl. 10, 15, 22, for 
like reason of priority becomes Y. constricta, Buckley ,— 
Sargent, 7. c. 10: 27-8. pl. 504. 
A Prouirerovus Yucca. 
Some years since, while collecting in the Southwest, Miss 
A. I. Mulford secured an inflorescence of Yucca constricta 
( Y. elata) which is figured on the accompanying plate, in 
which the upper bracts subtend rather dense clusters of 
short ultimately slightly filiferous leaves, above some of 
which flowers stood, so that the fascicles evidently repre- 
sent the upper branches of a normal panicle. But the 
most interesting feature of the specimen is an apical tuft 
of more filiferous leaves about five inches long, which, 
though somewhat intermediate in character between bracts 
and foliage leaves, clearly act as the latter. 
A number of species of Agave, of the Euagave section, 
are known to be normally viviparous, producing bulb- 
lets in place of many of the flowers in their panicles, and 
occasionally the production of bulblets in the inflorescence 
of an Agave of the section Littaea has been observed, but 
I am not aware that anything of the kind, or anything 
approaching the present case, has yet been recorded for 
Yucca. 
* Supra, pp. 141-2. 
+ Miss Mulford, Rept. Mo. Bot. Gard. 7: 56. pl. 62,— Rose, Rept. Mo. 
Bot. Gard. 9: 122, 
