-----dissectum,- -multifidum,- -- -sanguineum,-pensylvanicum,-pests,--columnare,- -erectum,--- -schwedleri,---- -- - -on--,- --,--Acer negundo elegans, 14: 14nikoense, 16: 36palmatum, 14: 2, 14-atropurpureum, 8: 46; 12 : 4;14 : 14, 49‘Burgundy Lace’, 14: 1414: 14’- - hessei, 14 : 1414: 2ornatum, 14: 1414: 14_23: 12 319: 4, 7- platanoides, 11: 71 ; 14: 49; 17:20,289: 2; 12: 4; 14: 49-- ’Crimson King’, 12: 4; _14: 14,49; _15: 18, 52; 1_6: 52-- ‘Emerald Queen’, 23: 1169 : 2-- ‘Fassen’s Black’, 16 : 18, 52-- hedge, 27 : Plate V, 26rubrum, 14: 1414: 14-rubrum columnare, 6: 10; 8: 46,47; 9: 2; 12: 4; 14: 49--schlesingeri, 7: 53; _16: 34-saccharinum, 8: 10; 14: 49--monumentale, 6: 10; _8: 47;_9: 2- tartaricum, 17: 49, 5 3-tegmen<strong>to</strong>sum, 17: 5 3-triflorum, 16 : 36; _17: 53, 55; 23 :123, Plate XI, 124-truncatum, 16 : 36- tschonoskii, 17: 53Achillea millefolium, 22 : 52Aconitum spp., _26: 72Acorns, 15: 72; _16: 68, 72Actea pachypoda, 26: 66, Plate XX,67Actinotinus sinensis, _2: 8Adair, Miss, 2_l: 36Adonis amurensis, 5: 1Aegopodium podograria, 13: 11; 14:22of Hillcrest Gar-Aerial pho<strong>to</strong>graphdens, 20: Plate XIII, 59Aesculus pests, 19 : 6, 7Agaricus campestris, 4_: 2Agave, 15: 72, Plate XIV, 77, 78Aglaia odorata, 2: 8Agropyron repens, 7: 69Agrostis alba, 22 : 50Ailanthus altissima, 21: 67erythrocarpa, 7: 58_ _ , fruiting, 10: 82Air layering experiments, materialsused, 11: Plate XIII, 53Malus ’Dorothea’, 11:Plate XIV, 60_ _ -, plants that rooted, 11: 54-57- _ -, plants that failed <strong>to</strong> root, 11:5 7-61- - -, results, 11: 61, 62_ _ _with Polythene Film, 1_l: 49-62Ajuga reptans, 14: 22Akebia, 14: 22 ,-quinata, _13: 7Alaska Military Highway, Expeditions<strong>to</strong> the, 1943-1944, 4: 65-72Alaskan Ornamentals and Fruits,25: 9-12Alathon, 11 : 50Albizia, _2-l: 24, 25. -- julibrissin, 28: Plate IX, 31, PlateXI, 35, 29-40- - and its cultivar ’Ernest Wilson’,28: Plate X, 33,29-3 5Propagation of, 28: Plate XII,37, Plate XIII, 39, 36-40Albizzia julibrissin rosea, _3: 27; _6:11; _8: 47; _9: 2; 12 : 4; 1_6: 36; 18:15; _21: Plate I, 23, 25; _25: 2- _ -,germinationclose-up of flowers andshowing tree itself, 8 : PlateXIV, 49of seed, 25:Plate I, 4Alder, Black, 15: 78Allamanda cathartica, 19: 73Allegany pachysandra, 28 : 6Alnus glutinosa,16: 20Alsike Clover, 22 : 5010
-atlanticum,-ber<strong>to</strong>lonii,-borzaeanum,-cuneifolium,-diffusum,-lapeyrousianum,-moellendorfianum,-montanum,-murale,-purpureum,-serpyllifolium,--- -Ground-catesbaei,--Althaea, 1 : 41-44-, culture of, 1 : 42-, propagation of, 1: 43- rosea, 22: 54-, shrub, 18 : 45-5 1_ , winter injury of, 1: 42Alyssum alpestre, 26: 3826: 40_26: 4026 :_26: 404026: 40_ gemonense, 8: 2 126: 40- markgrafii, 26: 4026: 4026: Plate XIII, 39, 4226 : Plate XIII, 39, 42- ovirense, 26: 4226: 42repens, 26: 42-scardium, 26 : Plate XIV, 41, 4426: 44-spinosum, 26: Plate XV, 43, 44- stribrnyi, 26 : 44-<strong>to</strong>rtuosum, 26: 44-, trial plot at Case Estates of theArnold Arboretum, 26 : Plate XV,43-wulfenianum, 26: 44Amateur’s Observations on Hardinessfrom Growing Rhododendronsin the Pacific Northwest, 2 : 5 3-56Amelanchier asiatica, 16 : 20canadensis, 14: 49laevis, 12: 6 ; 14 : 49pests, 19: 5, 7spp.,4: 6Amelanchiers, 14: 9American Association of BotanicalGardens and Arboretums, 3: 44- - - - ---; Committee on HorticulturalVarieties, 2:3 3American Association for the Advancemen<strong>to</strong>f Science, _7: 3 3American Elm, 11: 41American Holly,14: 68-, flowering habits of, 14 : 68American Horticultural Council,17: 57, 60American Horticulture Needs <strong>to</strong>Adopt Uniform Color Standards,7 : 41-52American Smoke Tree, 28: 1, 2Ammonium sulfamate, 16 : 5Among the Best Common Vines,13: 18Covers, 13 : 19Amoracia rusticana, _22: 5 5Amorphophallus campanulatus, 4:Plate V, 35Ampelopsis brevipedunculata, _13: 7- pests, 19: 6, 7Anacardium occidentale, _4: Plate V,35Anaphalis margaritacea, 15: 76Anderson, Edgar,12: 42Anderson, Larz, collection, 14: 2.’lndromeda axillaris, 23 : 94, 9523: 94-, Downy, 17 : 62-glaucophylla, 17: 62Japanese, 17-: 74-, Mountain, 17 : 74serratifolia, _23: 94Anemone nemorosa, _5: 84Anthoxanthum odoratum, 22 : 50Anthracnose, 19: 3, 8Anthurium andraeanum, 15: 8 3- cul<strong>to</strong>rum, 15: 82Antigonon, _19: 68_ lep<strong>to</strong>pus, _19: 68Anti<strong>to</strong>xin Labora<strong>to</strong>ry,State ofMassachusetts, _7: 2Apples, dwarfing unders<strong>to</strong>ck for,10: 73-76Apricot, _2: 4Aquilegia vulgaris, 5: 84Aralia elata variegata,Araliaceae of China, 2: 5 1Aramite, 13 : 83Araucaria araucana, 5: 83-bidwillii, 15 : 7816: 201 1
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