The Oak-Hornbeam Woods of Hertfordshire Parts I and II

(1) General and Introductory . . . . . 14 (2) Edaphic Conditions . . . . . . . . 15 (Humus, p. 19; Water Conltent, p. 20; Aciditv, p. 21.) (3) Light Conditions . . . . . . . . 23 (4) The Phanerogamic Flora. . . . . . 25 (a) The Tree-layer, p. 25. (b) The Shrub-layer, p. 27. (The Bubus fruticosus Society, p. 29.) (c) The Ground Flora, p. 30. (The Pteris Society, p. 30; The Scilla nutans Society, p. 32; The Nepeta Glechoma Society, p. 32; The Mercurialis Society, p. 33; The Ficaria vernaSociety, p. 33; The Path Society, p. 34; The Anemone Society, p. 35; The Marginal Society, p. 39.) (d) The Flora of the coppiced Wood, p. 39. Effects of coppicing, p. 39; Flora of coppiced areas, p. 40. (e) Colonisation, p. 41. (5) The Cryptogamic Flora . . . . . . . 42 (a) Musci, p. 42. (b) Hepaticae, p. 44. (c) Algae, p. 45. (d) Lichens, p. 45. (e) Fungi, p. 46. (f) Mycetozoa, p. 46.