ALEXANDER BRAUN. 325 
in the ‘“Abhandlungen” and ‘ Monatsberichte” of the Berlin 
Academy, Of this s body he was elected a member on June 19th, 1851, 
end 
of his life, and his last work was a monograph of the Silesian ee 
for the ‘‘ Kryptogamen Flora von Schlesien,” 1877.* The ‘‘ Characez 
Europe exsiccate ” of Braun, Rabenhorst, and Stitzen aber were 
issued (fasc. 1 to 4) from 1867 to 1870, and the “ Conspectus Charac., 
Europ.” appeared in 1867. During these ears a large number of 
memoirs on Selaginella, Isoetes, Marsilea, and Pilularia from various 
countries were published in the ‘‘ Monatsber. der Berlin Akad.” and 
e ‘‘ Linnewa.” Braun also read several bee at the meetings of the 
Gesellschaft Naturforschender Freunde o w Cycadee and on the 
question of the Bynmonpermy of Be pla 
The ork ding der Pflanze in seinem 
“Ue se 
dadurch bedingte Drehung der Stimme” (Monatsbericht der Berlin 
Akad., August, 1854) and ‘De Algis unicellularibus nonnullis novis 
vel minus cognitis premissis observationibus de Algis unicellularibus in 
genere,” published at Berlin in 
In the same year follow ad one on Chytridium and allied 
genera and on Pleurocladia bene, and in 1857 the important 
researches on Parthenogenesis. In these Celebogyne ilicifolia, J 
Smith, and Chara crinita be the plants chiefly referred to, rsten 
t this time, who also studied Calebogyne, attempted to show 
that Parthenogenesis aid not occur. Braun never accepted this, 
and in 1864, at his instigation, Hanstein commenced to work at the 
subject, and asa result we find him asserting (Bot. Abhandl., 1877) that 
arthenogenesis undoubtedly occurs in the plant in uestio on, The 
investigations of De Bary on Chara crinita (Bot. Zeit. 1859, 379), 
an. 
aniet 
He pe his attention not cy to porta iit but also 
- to gen jects. For instance, we find him lecturing on “ Right 
snd 1 Left” in the Singakademie of Berlin. When he ina Rector 
