CLASSIFIED HABITATS 431 



20. Swale: A tract of low and usually wet land; see fen; 

 (a) margin. 



21. Slough: A wet place of deep mud or mire; (a) margin. 



22. Swamp: Wet, low, spongy land, saturated but not 

 usually covered with water; (a) sandy; (6) wet; (c) cedar; 

 (i) tamarack; {e) wooded; (/) cypress; {g) margin. 



23. Swamp Forest: A tract of land saturated with water and 

 covered with trees that have never been cultivated; (a) margin. 



24. Swamp Open Woodland: Wet lowland sparingly covered 

 with trees; (a) margin. 



25. Savannah: A tract of damp level land with a growth of 

 grass or reeds; in the south. 



26. Meadow Thicket: Lowland covered with thickly set 

 trees and shrubs: (a) margin. 



27. Fen: Lowland overflowed. 



28. Bank: The rising ground bordering a lake or river; 

 the margin of a watercourse; (a) rocky; (6) grassy; (c) sandy; 

 {d) alluvial ; when rising steeply it is {e) a bluff. 



29. Rocky Seashore: The stony land lying adjacent to the 

 sea. 



30. Sandy Shore: The sandy land lying adjacent to the sea; 

 (a) lake. 



31. Tank: A large basin: (a) a cistern; (6) margin; (c) atoll. 



^ II. Middle Plant Formations: Mesophytia. 



Subsection: Shade-plant formations: Sciophytia. 



32. Forest or Woodland: Land covered with trees; the 

 forest refers to a tract of land covered with trees that has never 

 been cultivated; (a) dry; (h) moist; (c) cold damp; {d) rich; 

 (e) deep; (/) wet; {g) rocky; {h) border. 



33. Open Woodland: Land openly scattered with trees; 

 (a) thin; (6) border. 



34. Grove : A smaller group of trees than a forest, and without 

 underwood; (a) border. 



35. Copse: A wood of small growth; a thicket of brushwood; 

 (a) border. 



36. Glade: An open passage through a wood; a grassy open 

 or cleared space in a forest; (a) border. 



37. Orchard: An enclosure containing fruit-trees; not usually 

 applied to nut-bearing trees. 



38. Canyon: A deep gorge or gulch between high steep banks 

 worn by watercourses; occurring in western United States. 



39. Ravine: A deep narrow hollow, usually worn by a stream 

 or torrent of water; (a) border; (6) damp. 



40. Thicket: A wood or collection of trees, shrubs, etc., 

 closely set; (a) dry; {h) moist; (c) low; {d) border. 



