57] Nordauierikanisches Pflanzenreich. 975 



287. Fairchild, 1). New plant immigrants. (Nat. Geogr. Mag., XXII, 

 1911, p. 879—907, ill.) 



Neue Einwanderer in die Vereinigten Staaten. 



288. Fernald, M. L. The variations of Lathyrus palustris in eastern 

 America. (Rhodora, XTII, 1911, p. 47—52.) 



288a. Fernald, M. L. and Wiegand. K. M. Some boreal species and 

 varieties of Antennaria and Anaphalis- (Rhodora, XIII, 1911, p. 23 — 27.) 



288 b. Fernald, M. L. and Wiegand, K. M. Cornus canadensis var. inter- 

 media in eastern America. (Rhodora, XIII, 1911, p. 107 — 108.) 



288c. Fernald, M. L. and Wiegand, K. M. The representatives of 

 Erigeron acris in northeastern America. (Rhodora, XII, 1910, p. 225 

 bis 227.) N. A. 



288d. Fernald, M. L. and Wiegand, K. M. A Synopsis of the species 

 of Arctium in North America. (Rhodora, XII, 1910, p. 43—47.) 



Für die Flora von Nordamerika kommen in Betracht: Arctium lappa, 

 A. tomentosum, A. nemorosum und A. minus. 



288e. Fernald, M. L. and Wiegand, K. M. The North American 

 variations~of Juncus effusus. (Rhodora, XII, 1910, p. 81—93.) N. A. 



289. Frye, T. C. Height and dominance of the Douglas fir. 

 (Forest Quart.. VIII, 1910, p. 465-470.) 



290. Greene, E. L. New western Asteraceac (Leaflets of Botanical 

 Observation and Criticism, II. 1909, p. 1—24.) X. A., westl. Nordamerika. 



290a. Greene, E. L. New Species o f Sambucus. (Leaflets of Botanical 

 Observation and Critism, II, 1910, p. 99—101.) 



N. A., Kalifornien, Arizona, Minnesota. 

 290b. Greene, E. L. Some Southwestern Mulberries. (Leaflets of 

 Botanical Observation and Criticism, II, 1910, p. 112—120.) N- A. 



Jfon«s-Arten von Texas, Neu-Mexiko, Arizona und Mexiko. 

 290c. Greene, E. L. Three new Astragali. (Leaflets of Botanical Ob- 

 servation and Criticism, II, 1910, p. 42 u. 43.) 



N. A. von Mexiko, Niederkalifornien vi. Neu-Mexiko. 

 290 d. Greene, E. L. Some western Roses. (Leaflets of Botanical 

 Observation and Criticism, II, 1911, p. 132—136.) 



N. A., Dakota, Nebraska, Missouri, Montana. 

 290 e. Greene, E. L. Four New Potentillaceae. (Leaflets of Botanical 

 Observation and Criticism, II, 1911, p. 137 — 139.) 



N. A, Arizona, Neu-Mexiko, Utah, Kalifornien. 

 290f. Greene, E. L. Three New Labiatae. (Leaflets of Botanical Obser- 

 vation and Criticism, II, 1911, p. 139—141.) 



N. A., Illinois, Michigan, Georgia. 



291. Griffiths, David. Illustrated St u dies in the Genus Opuntla. 

 (Missouri Botanical Garden, Twenty-Second Annual Report. St. Louis, Mo., 

 1911, p. 25-36, Plate 1—17.) N. A. 



Neue Opuntia- Arten aus verschiedenen Teilen Nordamerikas. 



292. Harper, R. 31. The Relation of Climax Vegetation to 

 Islands and Peninsulas. (Bull. Torr. Bot. Ol., XXXVIII, 1911, p. 515—525.) 



Beobachtungen an der atlantischen Küste (vgl. Bot. Centrbl.. CXIX, 

 p. 476). 



