578 
Roseanthus albiflorus, sp. nov. Piate XXVIII. 
Slender vines, 9 to 12 dm. long, angled, pubescent: leaves ovate in outline, 3-lobed; 
middle lobe ovate, acuminate, constricted near its base, with small apiculate teeth, 
base with a broad open sinus: peduncle of male flowers 5 to 7.5 cm. long, of female 
flowers 4 to 6 mm. long: corolla 5 to 6 cm. broad: fruit the size of a small orange. 
Collected by Dr. Edward Palmer in fruit near Acapulco, Mexico, March, 1895 
(No. 599). 
Flowering specimens were raised by J. N. Rose from seed in the greenhouses of the 
United States Department of Agriculture at Washington. 
EXPLANATION OF PLATE.—Fig. 1, a branch of the male plant; fig.2,a branch of the female plant; 
fig. 3, the male flower laid open; fig. 4, the pistil; fig.5, the fruit; tig. 6, the seed. 
