MISSOURI BOTANICAL GARDEN BULLETIN 
59 
Approx. 
Botanical name Common name abpror. Color of | time of 
| height flowers bloom 
Tw. Ipomoea Wild potato-vine 8-20’ |White- May-Sept. 
pandurata purple 
striped 
Tw. Passiflora Yellow passion- 3-10’ |Yellow May-July 
lutea flower | 
Tw. Passiflora Passion-flower | 10-80’ |White with |May-July 
incarnate purple 
corolla 
Tw. Phaseolus Wild bean to 15’ (Purple July-Sept. 
polystachyus 
Tw. Polygonum Climbing false 10-20’ |Greenish Aug.-Sept. 
scandens buckwheat white 
NOTES 
Mr. G. H. Pring, Horticulturist to the Garden, spoke be- 
fore the Webster Groves High School, April 20, on ‘‘Spring 
Planting.’’ 
Dr. George T. Moore, Director of the Garden, attended the 
meetings of the American Philosophical Society at Philadel- 
phia, April 24-25. 
The October, 1919, number of the Plant World contains an 
article by B. M. Duggar, Physiologist to the Garden, on 
‘‘Some Factors in Research.’’ 
Mr. L. P. Jensen, Arboriculturist to the Garden, gave a 
lantern-slide talk on ‘‘Landscape Gardening,’’ April 16, be- 
fore members of the Chapter House, Edwardsville, Il. 
Recent visitors to the Garden include Mr. W. H. E. Retzer, a 
former pupil in the School for Gardening; Mr. Alexander 
Lurie, formerly Horticulturist to the Garden; and Mr. C. R. 
Stillinger, of the White Pine Blister Rust Investigation, 
Spokane, Wash. 
During the spring meeting of the American Chemical So- 
ciety in St. Louis, April 13-16, one of the official excursions 
was to the Garden. The party was shown the greenhouses, as 
well as the library, and an hour or more was spent in a diseus- 
sion of the research work in the laboratories. 
Dr. B. M. Duggar, Physiologist to the Garden, presented a 
paper before the Division of Biological Chemistry of the 
American Chemical Society, April 14, on ‘‘The Effect of 
Conditions on the Relation of Seed Plants to H-Ion Concen- 
tration of Nutrient Solutions.’? Mr. W. H. Chambers, Rufus 
J. Lackland Fellow, followed Dr. Duggar with a paper on 
‘“The Relation of Dextrose to H-Ion Concentration with 
Bacillus Coli.’’ 
