170 Übersicht der wichtigeren und umfassenderen, im Jahre 1889 über Systematik, 
Hollick, A.: A recent discovery of ‚hybrid oaks on Staten island. — Bull. 
of the Torrey bot. Club New York 1888. Dec. 
Holzinger, J. M.: Notes on Minnesota plants. — Bot. Gazette 1889. p. 290. 
Kellermann, W. A., and W. T. Swingle: New species of Kansas Fungi. 
—Journ. of Mycology Vol. V. p. 41, 442. 
Lemmon, J. G.: Draba Crockeri, Nama densa, sp. n. — Bull. of the Torrey 
bot. Club New York 1889. No. 8. 
Webber, H. J.: The flora of Central Nebraska. — American Naturalist 
XXIII. p. 633. 
West, W.: List of Desmids from Massachusetts. — Journ. of the R. mierose. 
soc. London 1889. No. 2. 
—— The fresh Water Algae of Maine. — Journ. of Botany 1889. p. 205 
—207. 
Williams, T. A.: Notes on Nebraska Lichens. — Amer. Naturalist XXIII. 
p. 161. 
Schriften, die sich auf ganz Nordamerika beziehen. 
a. Fossile Flora. 
Lesquereux: Recent determinations of fossil plants from Kentucky, Luisiana, 
Oregon, California, Alaska, Greenland ete. with descriptions of new 
species. 
Referat p. 32. 
Ward: Evidence of the fossil plants as to the age of the Potomae formation. 
— Amer. journ. of science Vol. 36. No. 212. 
b. Lebende Flora. 
Barnes, Ch. R.: Notes on North American mosses. I. — Bot. Gazette 1889. 
p. 44. 
Bebb, M. S.: Notes on North American willows. — Bot. Gazette 1889. 
p. 49—54, 115—147, pl. IX. 
Britton, E. G.: Note on North American Species of Tissa. — Bull. of the 
Torrey bot. Club New York 1889. No. 4. 
Coulter, J. and J, N. Rose: Revision of North American Umbelliferae. — 
144 p. 8°, with 9 pl. Crawfordsville, Ind. 1888. 
Crépin, Fr.: Nouvelles recherches sur les Roses américaines. — Compt. 
rendus de l'Acad. d. sciences de Belgique 1889. p. 18—33. 
Day, D. F.: Subularia in America. — Bull. of the Torrey bot. Club New 
York 1889. No. 41. 
Eckfeld, J. W.: New North American Lichens. — Bull. of the Torrey bot. 
Club New York 1889. No. 4. 
Farlow, W. G.: On some new or imperfectly known Algae of the United 
States. 1. — Bull. of the Torrey bot. Club New York 1889. p. 1—12. 
pl. 87—88. 
