763 
28988a~2900S Williams — Willis. 
88a Williams E. M. The masked Tricholoma (Tricholoma personatum Fr.) 
(Piant World, IV, 1901, p. 25—27) fig. 
89 — Fairy Rings (Piant World, IV, 1902, p. 206). 
90 Williams Stephen W. Report on the indigenous medical botany of Massa- 
chusetts (Transact. American Medie. Assoc., II, 1849. — Mushrooms 
p. 924). 
91 Williams Th. A. First contribution to the knowledge of Kansas Lichens 
(Bull. Washburn Coli. Lab. Nat. Hist., I, 1884, p. 16—17). 
92 — The Status of the Algo-Lichen Hypothesis (Amer. Naturalist, XXIII, 
1889, p. 1—8). 
93 — Flora of Nebraska (Nebraska Agrie. Rep., 1889). 
94 — Notes on Nebraska Lichens (Amer. Naturalist, XXIII, 1889, p. 161). 
95 — Notes on the Canyon Flora of Northwest Nebrasca (Amer. Naturalist, 
XXIV, 1890, p. 779—780). 
96 — Notes on Peronosporaceae (Bull. Torr. Bot. Club, XIX, 1892, p. 81). 
97 — The fruiting of Parmelia molliuscula Ach. (III. Ann. Rep. Miss. Bot. Gard., 
1892, p. 160—170) tab. 
98 — Notes on fungi (South Dakota State Rep., 1892, p. 24). 
99 — Lichens of the Black Hilis and their Distribution (Bull. Torr. Bot. Club, 
XX, 1893, p. 349—355). 
0 — Notes on Mexican Lichens. I. (Amer. Naturalist, XXIX, 1895, p. 480 
bis 485). 
1 — Experiments with potato scab (South Dakota Agr. Coli, and Exp. Stat. 
Brookings, Bull. 43. 1896) fig. 
2 — Where Lichens grow (Asa Gray Bull., V, 1897, p. 77—79). 
3 — A rare Lichen (Asa Gray Bull., VI, 1898, p. 85). 
4 — A half hour with Lichens. I (Asa Gray Bull., VI, 1898, p. 1—5). — II 
(1. c., p. 77—80). — III (1. c., VII, 1899, p. 52—55). 
5 Ascolichenes apud A. S. Hitchcock: List of Cryptogams collected in the 
Bahamas, Jamaica and Grand Cayman (IX. Ann. Rep. Miss. Bot. Gard., 
1898, p. 112—115). 
5 a — The velvet-stemmed Collybia (Asa Gray Bull., VIII, 1900, p. 1) tab. 
6 — Lichenes apud E. L. Greene: Plantae Bakerianae. Vol. II, Fasc. I, 
Washington 1901, p. 30. 
— cfr. Cummings C. E. 
7 Williamson E. B. A few inycological notes for Jnly and August 1900, 
Wells und Whitley Counties (Proc. Ind. Acad. Sci. f. 1900/1901, p. 161 
bis 165). 
8 Willis. Opera omnia. Amstelaedami 1682 (Capt. VIII. „De fermentatioue 
sive de Motu Corporum 41 )- 
