BRIEFER’ ARTICLES 
HABERLANDT’S NEW ORGAN ON CONOCEPHALUS.' 
PROFESSOR HABERLANDT’S contribution to the Schwendener 
Festschrift is an argument based upon previously published data.’ in 
which he arrives at conclusions of such great importance, if well founded, 
that further discussion is certainly worth while. Let us begin with a 
statement of the facts in the case, in which literal quotations are made 
from the Festschrift. ; 
The subject, Conocephalus ovatus, is a Javanese liane, with eu 
leathery leaves. On its upper surface are some hundred “Scharf a 
ferenzirte Epithem-Hydathoden mit Wasserspalten.” “Ee se 
anderen Pflanze war die nachtliche Wasserausscheidung a : 
Hydathoden so constant und schén zu beobachten, wie bei der ns a 
stehenden Liane.” In a concrete case, a leaf ejected 26 arses : 
_its own weight in water, in one night. When these hydathods 
_ Wasser.” The water gradually disappeared, with active tra mn 
_ during the forenoon. This was repeated for three or four days: *™" a 
there was a new response. “ Auf den bepinselten peers si eee 
namlich zum Ersatze der vergifteten Hydathhoden ganz new! ae “a 
ausscheidungsorgane von wesentlich anderem histologischen male 
anderer entwicklunggeschichtlicher Herkunft, wie oon t 
: Entwicklungsgange der Pflanzen niemals auftreten. ~ "entescelltl : 
mornings, drops were found on these structures, and = waren als? 
‘Spaces were not injected. “Die neugebildeten mee in ihr 
-vollkommen im Stande, die getddteten Epithem-Hydat a 
Funktion zu ersetzen.’ peor 
oe: HABERLANDT, G., Ueber experimentelle Hervorrufung ee 
Conocephalus ovatus Tréc. Bot. Untersuchungen S. Schwendener 
1899. 7 
aS ? HABERLANDT, G., Ueber wassersecrnirende und-absorbirende O18" S 
_ Be Wie, Wien. a:55, 1805, | jag 
jo 
