208 
afternoon work in, 82; scholarships 
in, 83; summary of afternoon 
courses in, 83; tuition in, 84 
Garlic tree, see Crataeva gynandra 
Genistas, 43 
Gesneriaceae, two rare epiphytic, 100 
Gifts of plants made during 1915, 12 
Ginger, see Zingiber officinale 
Gladiolus, 143, 144; culture of, 147 
Glory of the snow, 144 
Gloxinias, 105 
Glyptostrobus, 191 
Graduate students during 1915, 16 
Grafts, natural, 38; example of, on 
red oaks, 38; methods of forming, 
41; self, examples of, at Garden, 
41; at fork of two branches, 43; on 
ginkgo, 41; on hawthorn, 38; on 
Osage orange, 41 
Grape: investigations of Dr. George 
Engelmann on the, 87; sea or 
shore, see Coccoloba wifera; sea- 
side, see Coccoloba laurifolia; see 
Vitis capensis 
Grapefruit, see Citrus grandis var. 
“e oyal” 
Grass cloth, see Boehmeria argentea 
Gross, A. R. Notice to members of 
Garden Alumni Association, 76 
Growing houses, purpose of, 10 
Guaiacum officinale, 178 
Guavas, see Psidium 
Gum arabic tree, see Acacia arabica 
Gum box, Chilean, see Escallonia ma- 
erantha 
Gums, 175 
H. 
Harpephyllum caffrum, 165 
Hatfield House, gardens of, 33; garden 
and maze at, 34 
Heat, production of, in plants, 152 
Helianthus annuus, 151 
Heller, A. A. Plants of California, 
200 
Hemp, bowstring, see Sansevieria 
zeylanica 
Herbarium, report of, for 1915, see 
annual report of Director, 22; field 
work during 1915, 23; important 
accessions during 1915, 22; mount- 
ng and distribution of specimens, 
Hernandia sonora, 178 
Hevea brasiliensis, 175 
Hog-plum, see Spondias lutea 
Holly, 196 poe 
Holzinger, J. M. “Musei Acrocarpi 
Boreali-Americana,” Nos. 326-350, 
MISSOURI BOTANICAL GARDEN BULLETIN 
Honey berry, see Melicocca bijuga 
Honeysuckle, 66 
Horticultural experimentalist and his 
work, the, 66 
Hovenia dulcis, 165 
Hura crepitans, 182 
Hyacinths, 143, 146; propagation of, 
by scooping and scoring, 144 
Hyacinthus orientalis, 144 
Hybridization in plants, 134; history 
of, 134; importance of Mendel’s ex- 
periments in, 135 
Hydrangeas, 92, 105 
Hymenaea Courbaril, 165 
= 
Ilex opaca, 196; paraguensis, 158 
India-rubber vine, see Cryptostegia 
grandiflora 
Indigo tree, see Wrightia tinctoria 
Inga dulcis, 165 
Instruction, courses of, offered in the 
Shaw School of Botany during 
1914-15, 14 
Towa State College, new greenhouses 
at, 66; work being undertaken at 
experiment station of, 68 
Ipomoea Horsfalliae var. Briggsi, 178 
Isosoma orchidearum, 88 
Ixia maculata, 144 
J. 
Jaboranda plant, see Pilocarpus pen- 
natifolius 
Jacaranda ovalifolia, 186 
Jack-in-a-box, see Hernandia sonora 
Jak fruit, see Artocarpus integrifolia 
Jasmine, 66; see Jasminum : 
imu p , 183; fructicans, 
183; grandiflorum, 183; humile, 
183; officinale, 183; paniculatum, 
183; Sambac, 183; simplicifolium, 
183 
Jatropha Curcas, 178; multifida, 178; 
podagrica, 178; urens, 178 
Johnston, E, L. Plants of Colorado, 
200 
Jonquils, 146 
Jérgensen, Pedro. 
tina, 85, 141, 190 
ok 
Kalmia latifolia, 196 
Karatas, 97, 99 
Koelreuteria paniculata, 64 
Kumquat, see Citrus japonica 
eM, m Din 
Plants of Argen- 
