MISSOURI BOTANICAL GARDEN BULLETIN 13 
Jensen, L. P. ‘‘Interesting Native Flowering Trees for 
Park Planting.’’ Parks and Recreation, 1921. 
Jensen, L. P. ‘‘Proposal for the World’s Greatest Garden.’’ 
Parks and Recreation, 1921. 
Jensen, L. P. ‘‘Publications of Interest to Park Superin- 
tendents.’’ Parks and Recreation, 1921. 
Jensen, L. P. ‘‘The Value of Parks to Posterity.’’ Parks 
and Recreation, 1921. 
Pring, G. H. ‘‘Indoor Plant Collections at the Missouri 
Botanical Garden.’’ Parks and Recreation, 1921. 
Scientific and Popular Lectures—During the year papers 
read and lectures delivered, whether popular or scientific, 
by those connected with the Garden are listed below: 
B. M. Duggar, February 5, before the St. Louis College 
Club, ‘‘Some Aspects of the Japanese Problem in California.’’ 
B. M. Duggar, August 4, before the Pacific Coast section 
of the American Society of Naturalists in Berkeley, ‘‘Some 
Phases of Metabolism in the Fungi.”’ 
B. M. Duggar, August 4, before the Pacific Coast section 
of the American Society of Naturalists in Berkeley, ‘‘The 
Effects of Certain Colloids on the Salt Requirements of Seed 
Plants.’’ 
B. M. Duggar, December 29, before the mycological sec- 
tion of the Botanical Society of America and the American 
Phytopathological Society, Toronto, ‘‘Sizes of the Infective 
Particles of the Mosaic Disease of Tobacco.’’ 
B. M. Duggar, December 29, before the mycological section 
of the Botanical Society of America and the American Phyto- 
pathological Society, Toronto, ‘‘Notes on Some More Favor- 
able Liquid Media for the Growth of Fungi.’’ 
B. M. Duggar, December 30, before the physiological sec- 
tion of the Botanical Society of America and the chemical 
section of the American Association for the Advancement of 
Science, ‘‘Composition of the Substrate in Relation to 
Changes in H-Ion Concentration Induced by Fungi.’’ 
L. P. Jensen, March 9, before the St. Louis Association of 
Gardeners, ‘‘The Principles of Landscape Gardening.’’ 
L. P. Jensen, March 16, before the St. Louis Florists’ 
Club, ‘‘The Principles of Landscape Gardening.’’ 
L. P. Jensen, May 4, before the St. Louis Association of 
Gardeners, ‘‘Formal Landscape Gardening.’’ 
L. P. Jensen, May 16, before the St. Louis Academy of 
Science, ‘‘Conservation and Protection of Native Plants.’’ 
