PAPERS ON BOTANY 131 



16. Pogonia trianthophora has been found in five stations 

 during- all my many years of collecting. Four are far separated 

 clumps in southwest Michigan, the fifth three plants in a Jo 

 Daviess woodland. (G). 



17. Calopogon. Abundant southeast of Chicago. Was 

 found as a single plant on a bluff-crown of Jo Daviess. A 

 remarkable habitat for the one solitary example. (I). 



18. Arethnsa. Found in a single locality : southeast of 

 Chicago. A dozen plants in a cranberry bog. (G). 



19. Efiipactits pubesccns. A single colony a rod square 

 in a dry oak wood in Jo Daviess. Vigorous, but very strange 

 to its surroundings. This plant is frequent in southwest 

 Michigan, and northeast. Western limit. (G). 



20. Corallorrhiza maculata. In a dense Jo Daviess wood- 

 land ; the only station the plant has been seen in outside of 

 Michigan and Canada. Several plants. (G). 



21. A plectrum hyemale. Two plants. Twelve miles apart 

 in Jo Daviess, one on a Mound Crest, the other on a slope, both 

 in woods. A third station of two plants under a Thuja on 

 the bluff at Highland Park, north of Chicago. Common in 

 southwest Michigan. (G). 



22. Salix coactilis. A few plants on the Du Page river at 

 Warrenville, determined by Prof. Fernald. Maine is its home. 

 (I). 



23. Popuhis heterophylla. Quite a colony north of Port 

 Chesterton, Ind., in woods. Associated with the three common 

 species of Populus. Far to the north of its center. Badly 

 diseased and seemingly in a dying condition. (C). 



24. Carya Illinocnsis. A tree 3 feet in diameter and 80 

 feet in height, on the Mississippi river bottoms near lower 

 Jo Daviess. Copiouslv nut-bearing and perfectlv thrifty. 

 (B.C.) 



25. Betida alba papyrifcra. Summit of Benton Mound, 

 1100 feet altitude, Jo Daviess, on Niagara limestone. Mai\v 

 thrifty trees. From Jo Daviess north along the Mississippi 

 river bluffs. (C). 



