Mountain Ash. 10-30 ft. Cr.W. 7/16 in., 68 Black Currant. 3-5 ft. Y.G. 5/16 in., 69 Red Currant. 3-5 ft. Y.G. 1/4 in., 69 Wayfaring Tree. 10-20 ft. W. 3/16 in., 69 Ash. 40-50 ft. Br. 1/8 in., 69 Spurge Laurel. 2-4 ft. Y.G. 1/4 in., 70 Mezereon. 2-4 ft. p.R. 3/16 in., 70 Common Elm. 50-120 ft. Br. Clusters 1/2 in., 71 Wych Elm. 40-100 ft. Br. Clusters 1/2 in., 71 Oak. 40-100 ft. G., 72 Beech. 40-100 ft. G., 73 Hornbeam. 20-60 ft. G., 74 Hazel. 8-16 ft. Y.G., 74 Common Birch. 20-50 ft. G., 75 Dwarf Birch. 1-3 ft. G., 75 Alder. 20-50 ft. R.Br., 75 White Poplar. 60-100 ft. Pu.Br., 76 Grey Poplar. 60-100 ft. Pu.Br., 76 Aspen. 30-80 ft. d.Br., 76 Black Poplar. 50-60 ft. Pu.Br., 77 Scots Pine. 50-100 ft. G.Y., 77 Yew. 20-50 ft. G. 1/8 in., 78 NOTE.--The colours given above, in the case of trees bearing catkins, are generally those of the more conspicuous male flowers. 3. WAYSIDES AND WASTE GROUND--SPRING. Celandine. 1-2 ft. Y. 3/4 in., 81 Shepherd's Purse. 6-18 ins. W. 1/10 in., 81 Scurvy Grass. 4-8 ins. W. 1/4 in., 82 Whitlow Grass. 1-4 ins. W. 1/8 in., 82 Yellow Rocket. 1-2 ft. Y. 5/16 in., 83 Early Winter Cress. 1-2 ft. Y. 3/16 in., 84 Garlic Mustard. 1-2 ft. W. 1/4 in., 84 Thale Cress. 6-10 ins. W. 1/8 in., 84 Rape. 1-2 ft. Y. 3/8 in., 85 Wild Turnip. 1-2 ft. Y. 3/8 in., 85 Sweet Violet. 3-6 ins. V., Li. or W. 3/4 in., 85 Ciliated Pearlwort. 2-4 ins. W. 1/8 in., 85 Procumbent Pearlwort. 2-3 ins. W. 1/8 in., 85 Greater Stitchwort. 1-2 ft. W. 3/4 in., 86 Lesser Stitchwort. 1-3 ft. W. 3/16 in., 87 Chickweed. 3-12 ins. W. 3/16 in., 87