CONTRIBUTIONS FROM THE GRAY HERBARIUM 
‘onal 
OF HARVARD UNIVERSITY 
New Srrres.— No. LVI 
. Further new or otherwise interesting Liliaceae 
__ A Revision of Mirabilis, Subgenus Hesperonia 
_ A Revision of Mentzelia, Section igo 
phytum 
. Certain North American eee 
. Reclassified or new yan ona e North 
American Helenieae 
Various American levied ne 
transferred BE ae 
w or 
By J. FRANCIS MACBRIDE 
HARVARD UNIVERSITY PRESS 
CAMBRIDGE, MASS., U.S.A. 
DeceMBER, 1918 
36 
50 
