178 
of very limited local distribution, 
166 
Platanus occidentalis, 80 
Plums, 102, 151 
Prunus americana, 
151 
Pseudomonas tumefaciens, 75 
Publications and papers published 
by staff during 1921, 12 
Pyrus coronaria, 102, 150; ioensis, 
150; Malus, 102 
Q 
Quince, Japanese, 152 
R 
Raspberries, 103 
Red-bud, white, 110; branch of, 110; 
description of, 110; specimen of, 
at Garden, 95 
Research and instruction, 10 
Rubber, 164 
108; serotina, 
S 
Salads, native plants used as, 107 
Sambucus canadensis, 151 
School for Gardening, 6, 7, 7, 95; 
courses of instruction in, 97; offi- 
cers of administration and _ in- 
struction in, 96; outline of work, 
99 ; 
von Schrenk, Dr. Hermann, Plants 
of Santo Domingo, 94; Plants of 
Wyoming, 146 
Seeds, viability of, 44 
Shading greenhouses, 82, 83; prep- 
aration for, 83 
Signatures, doctrine of, 71 
Simplicium medicamentorum, 70 
Statistical information for Decem- 
MISSOURI BOTANICAL GARDEN BULLETIN 
ber, 1921, 24; January, 1922, 35; 
February, 54; March, 77; April, 
93; May, 112; June-August, 124; 
September, 145; October, 158; No- 
vember, 171 
Strawberries, 103 
Strelitzia augusta, 27; Reginae, 27 
Sweet bay, see Magnolia virginiana 
Sweet gums, growth of, 166 
Sycamore, American, 80; specimen 
of, at Grant Farm, 80, 8&2 
T 
Triticum durum, 164 
Tubers and roots, native, used as 
food, 104 ” 
Tulips, 136 
Twigs as weather recorders, 164 
U 
Ulmus americana, 25 
Umbrella tree, see Magnolia tripe- 
tala 
V 
Vanished plants of our local flora, 
28; list of, 30 
W 
Walnuts, black, 103 
Water-lilies, day-blooming, 127; noc- 
turnal hybrid, of the late James 
Gurney, 147 
Weather conditions in St. Louis in 
1921, 5 ; 
Weigel, Theo. Oswald, Plants of the 
Nyassa Mountains, Africa, 159 
Wheat seeds, viability of, 43 
Woody plants used as medicine, 154 
