Lange: REVEGETATION OF TRESTLE ISLAND. 627 
19. Water pepper (Polygonum hydropiper). 
20. Climbing false buckwheat (Polygonum scandens). , 
21. Lamb’s quarter (Chenopodium sp.). 
22. Dock (/eumex sp.). 
23. Giant sunflower (Helianthus giganteus). 
24. Black-eyed Susan (/tudbeckia hirta). 
25. Common thoroughwort (Aupatorzum perfoliatum). 
26. Late goldenrod (Solzdago serotina). 
27. Canada goldenrod (Solzdago canadensis). 
28. Prairie mugwort (Artemzsca guaphalordes). 
29. Bushy aster (Aster dumosus). Identified from leaves only. 
30. Red clover (7rzfolium pratense). 
31. Peppergrass (Lepidium sp.). 
32. Tall sisymbrium (S%symbrium altissimum). 
33. Black mustard (Brassica nigra). 
34. Black nightshade (Solanum nigrum). 
35. Bristly buttercup (Aeanunculus pennsylvanicus). 
36. Swamp willow-herb (Zp7lobzum palustre). 
37. Common evening primrose (Onagra bzennis). 
38. Canada thistle (Carduus arvensis). 
39. Common thistle (Carduus lanceolatus). 
40. Water hemlock (Czcuta maculata). 
41. Nodding wild rye (Alymus canadensis). 
42. Squirrel-tail grass (Hordeum jubatum). 
43. Grass sp. 
44. Grass sp. 
45. Grass sp. 
46. Grass sp. 
47. Sedge (Cyperus sp.). 
THE SEASON OF 1900. 
The last half of October, 1899, was quite dry and at the end 
of the month the United States Weather Bureau reported an 
accumulated deficiency in precipitation since January first of .73 
inch. On some day between October 29 and November 4, 
1899, a prominent factor in plant distribution appeared on the 
East section of Trestle island. Fire changed the wilderness 
of dead, dry weeds into a black, ashy waste. 
On May 6, 1900, the East section looked, on the whole, still 
barren and black. All the over-ground parts of the young 
