state horticultural society. 485 



Darlington, Wm. 



Auiericau Weeds and Useful Plants. Eevised by George 

 Thurber, (1) p. 199, (2) p. 241. 

 Dimitrieyicz, Xicol. 



Wie lauge bewaliren die Samen iiuserer Culturpflanzen ihre 

 Keimfahigkeit. In Haberlundt's Wissenschaftliche TJn- 

 tersiicbimgen, etc. 

 Englemann, Dr. George. 



In Plautse Lindheimerianse, p. 154. 

 Gray, Dr. Asa. 

 Darwiniana. 



(1) Am. i^atiiralist, Burs in tbe Boarage family. Vol. X, 



1876, p. 1. 



(2) Am. Jour, of Sc. Vol. XXV, p. 253, and Vol. XXVI, 



p. 138. 

 Haberlundt, Dr. G. 



(1) Wissenscbaftlicb-pracktische TJntersiicbingen auf dem 



Gebiete des Pflanzeubaues. 



(2) Wiener Laudw. Zeitung, 1873, p. 126. 

 Ihne, Dr. Egon. 



Studien ziir Pflauzengeograpbie; Verbreitung Yon Xantbium 

 strumarium und Gescbicbte der Einwanderung you Xan- 

 tbium spiuosum. 



KABSCH, Dr. WiLHELM. 



Das Pflauzenleben der Erde. 

 KoppEX, Fr. Th. 



Ziir Yerbreitung des Xantbium spinosum L., besonders in 

 Russland, nebst kiirzen notizen liber einige andere Un- 

 krliuter Siid Russlands, p. 36, (2) p. 35. 

 Keaet. Dr. GuiDO. 



Ptlanzen Baulebre. (1) p. 76 and 189. 



In tbis work are enumerated tbe principal weeds, with 

 figures of fruits and seeds of many of tbe troublesome 

 weeds in tbe fields and gardens of Germany. 

 Lazi:xby, Prof. W. E. 



R(^port on Weeds, Obio Agricultural Experiment Station, 



1884 and 1885. (1) 1884, p. 158. (2) 1885, p. L85. 

 Weedy plants of Obio. 



Proceedings of tbe 7tb annual meeting of tbe Society for tbe 

 Promotion of Agr. Science, 1886. 

 Martixs, Ch. 



Experience sur la Persistance de la Yitalit^ des Graines 

 flottant a la surface de la Mer. 



