INDEX 
Heteroauxin, 104 
Heterocysts, 336 
Heuchera, 531 
Hevea, 550 
latex of, 101 
Hevea braziliensis, 551 
Mibiscus, flower of, 267 
Hibiscus abelmoschus, 562 
Hibiscus Syriacus, 560 
Hickories, 504 
stems of, 202 
Hilum, 
of ovule, 287 
of seed, 321 
of starch grain, 77 
Hip, defined, 304 
Histological technique, 675 
Histology, defined, 2 
of dicotyl roots, 167 
of Aconitum, 175 
of annual dicotyl stem, 194 
of anther, 277 
of Aristolochia Sipho stem, 199 
of bark, 208 
of California Privet root, 170 
of Cascara Sagrada, 208 
of Convallaria rhizome, 215, 217 
Corn stem, 216 
of dicotyl roots, of primary growth, 
167 
of secondary growth, 169 
of dicotyl stems, 194 
of dicotyl tuberous root, 175 
of Ephedra sinica stem, 469, 470 
of fern rhizome apex, 58 
pinnule, 61 
root, 58 
sori and sporangia, 67 
stem (rhizome), 55 
stipe, 60 
of filament, 277 
of fruits, 307 
of grass stems, 219 
of Greenbrier stem, 217 
of herbaceous monocotyl stem, 215 
of leaves, 247 
of Lilac leaf blade, 247 
of mericarp, 309 
of monocotyl rhizome, 215 
763 
Histology, of monocotyl roots, 165 
of monocotyl stems, herbaceous, 
215 
woody, 217 
of perennial dicotyl stem, 199. 202 
of petioles, 242, 244 
of seeds, 315 
of sunflower stem, 194 
of typical monocotyl rhizome, 215 
of Vanilla capsule, 307 
Holdfast, 355 
Holly, 552 
Hollyhock, 401 
Honey dew, 395 
Honey Locust, 189 
Honeysuckle, 272, 291, 305, 606 
Honeysuckle Family, 606 
Hooke, Robert, 17 
Hooker, J. D., 326 
Hop, 127, 188, 259, 291, 507 
Fig. of, 508 
Hordeum vulgare, 485 
Horehound, 261, 595 
Hormogonia}; 336 
Hormones, 104 
Hornbeam, 504 
Horse chestnut, 187, 256 
Horsemint, 594, 596 
Horsenettle, 596 
Horsetails, 431, 437 
Horticulture, defined, 3 
Hound’s Tongue, 593 
Houseleek, 96, 189 
Huckelberries, 581 
Hudsonia, 567 
Humulus, 510 
glandular trichomes of, 125, 127 
Humulus Lupulus, 510 
Hutchinson, J., 326 
Huxley, 30, 31 
Hyacinth, 489 
Hybrid, defined, 329 
Hybrids, ‘Splitting of,’ 645 
Hydathode, 124 
Hydnacea, 404 
Hydnocarpus anthelmintica, 565 
Hydnocarpus Wightiana, 565 
Hydnum, 404 
