318 PHYLUM XIV. ANTHOPHYTA 
AnTHOPHYTA, developed microsporophylls into stamens, 
—reduced the sperms to non-ciliated cells, 
—developed megasporophylls into pistils, 
-—developed a proper perianth, 
—perfected fibrovascular bundles, 
arranging them in a cylinder, 
—perfected the thickening of the stem, 
by fibrovascular and interfascicular cambium. 
LITERATURE OF ANTHOPHYTA 
J. M. Counter and C. J. CHamBrerLAiIn, Morphology of 
- Angtosperms, New York, 1903. 
N. L. Brirron and Appison Brown, IIlustrated Flora of the - 
Northern States and Canada, Second Edition, New York, 
1913. 
N. L. Brirron, Manual of the Flora of the Northern States 
and Canada, Second Edition, New York, 1905. 
B. L. Roprnson and M. L. Ferna.p, Gray’s New Manual of 
Botany, New York, 1908. 
J. K. Sma, Flora of the Southeastern United States, Second 
Edition, New York, 1913. 
J. M. Covutrer and Aven Netson, New Manual of Botany . 
of the Central Rocky Mountains, New York, 1909. 
F. E. and E. 8. CLEMENTS, Rocky Mountain Flowers, New 
York, 1914. 
TO Frye and G. B. Riaa, Northwest Flora, Seattle, 1912. 
L. R. Asrams, Flora of Los Angeles and Vicinity, Stanford 
University, 1911. 
