76 
Tsuga heterophylla, 66 
Ulmus campestris, 64 
Uniflorae Thorns, 23 
Viburnum alnifolium, 10, 47 
Canbyi, 40, 47, 48 
Carlesii, 11 
cassinoides, 39, 40 
dentatum, 40, 47 
dilatatum, 40 
furcatum, 11 
Jackii, 31 
lantana, 40 
Lentago, 30 
prunifolium, 30 
Sieboldii, 30, 40 
tomentosum, 40 
venosum, 40, 47, 48 
Wrightii, 40 
Viburnums, 37 
late-flowering, 39 
some early-flowering, 10 
the last, 47, 
Virides Thorns, 22 
Vitis amurensis, 66 
arizonica, 64 
bicolor, 66 
cinerea, 64 
Coignetiae, 66 
Vitis cordifolia, 64 
Davidii, 66 
Doaniana, 64 
labrusca, 54, 55 
Pagnuccii, 55 
palmata, 54 
pulchra, 55 
rotundifolia, 65 
rupestris, 64 
vinifera, 55, 56 
vulpina, 54 
Walnut-trees, 63 
Washington Thorn, 23, 47 
Water Oak, 64 
Weeping Cherry, 7 
White Fir of Colorado, 66 
White Pine, western, 66 
Chinese, 66 
Himalayan, 66 
Japanese, 66 
Mexican, 2, 65 
western, 66 
Wild Goose Plum, 62 
Wild Plum, 63 
Winter-flowering Witch Hazels, 3 
Witch Hazels, 51 
Zenobia pulverulenta, 48 
var. nitida, 48 
