YUCCAS OF THE RUPICOLA SERIES. 103 
EXPLANATION OF PLATES. 
Plate 104.—Yucca Thompsoniana. 1, Two plants, one nearly acaul- 
escent and the other with a trunk about 4ft. long. Photographed near 
Marathon, Texas, by Professor F. E. Lloyd. 2, A cluster of essen- 
tially acaulescent plants, Photographed at Langtry, Texas, by Mr. 
C. H. Thompson. 
Plate 105.—Yueca Thompsoniana. Type sheet, in the herbarium 
of the New York Botanical Garden. About one-third natural size. 
Plate 106.—Yucca Thompsoniana. Partof a fruiting inflorescence, 
from the Pecos (Thompson). Natural size. 
Plate 107.—1, Yucca Thompsoniana. 2, Y. rupicola. Capsules 
and seeds, natural size. 
Plate 108.—Yucca Reverchoni. 1, Flowers of the type collection. 
2, Narrow leaf fragment and part of young panicle (Thompson). 
