Pu a Ree ae ete Me ek ee ee 
ae ee Wes ee arse TS Qh re pt i ne 3 eres 
VOLUME LI NUMBER I 
BOTANICAL GAZETTE 
JANUARY 1911 
THE ORIGIN AND TAXONOMIC VALUE OF THE “VEIL” 
IN DICTYOPHORA AND ITHYPHALLUS? 
Gro. F. ATKINSON 
(WITH PLATES I-VII AND ONE FIGURE) 
Although Jthyphallus impudicus is quite common and widely 
distributed in Europe, a complete and satisfactory account of 
its development, which is sufficient for a full comparison with other 
related plants, has not yet been given. This is probably due to 
the fact that it is very difficult to find a sufficiently large number 
of good specimens in the young stages of development. The more 
recent and most nearly complete accounts are those by Ep. FISCHER 
(6, p. 22; 7, p. 12) and VAN BAMBEKE (17-21). The gross struc- 
tures in the later stages of development had already been described . 
by RossMAN (14, p. 185) and by DEBary (3, p. 203), but FISCHER 
studied the principal features in the origin and development of 
the parts within the undifferentiated fruit bodies, from the time 
when they first make their appearance on the rhizomorphs as mi- 
nute undifferentiated structures, only a few millimeters in diameter, 
up to their complete differentiation. 
Notwithstanding the valuable results which are presented in 
these contributions, there still remain some questions concerning 
which there is a difference of statement and opinion as expressed 
by several students and writers on the Phallales. These questions 
relate to the very early origin and differentiation of the fruit body, 
* Contribution from the Départment of Botany of Cornell University, no. 138. 
Note.—Investigation prosecuted with the aid of a grant from the Botanical 
Society of America in 1905. 
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