Cystocarp in Rhodomelaceae (//). 1 87 
Chondria tenuissima, C. Ag., of Schmitz’s group Polysi- 
phonieae, is also of common occurrence in the district. In 
this plant Schmitz had already observed a considerable 
divergence in the structure of the procarp. In the absence 
of any figures illustrating his observations, I have thought 
it desirable to repeat, and if possible extend, the investigation, 
and particularly to figure the aberrant conditions. 
Dasya coccinea, C. Ag. 
The development of the cystocarp in this plant has already 
been the subject of a careful investigation by Janczewski (6), 
and his description is illustrated by no fewer than fifteen 
figures. As my own observations differ from those of 
Janczewski in some important particulars, it will be more 
convenient to deal with these points of divergence together. 
Schmitz does not appear to have examined Dasya at the 
time of publication of his paper on the fertilization of the 
Florideae (7), at any rate there is no reference to the genus 
within the limits of the paper. Later (3 a) he seems to have 
examined D. elegans , C. Ag., as that species is given as the 
type-species of the genus in his systematic review of the Flo- 
rideae. Later still (8) he made a careful survey of the genus 
for taxonomic purposes, but this work does not include any 
description of the structure of the procarp. The genus has 
not been figured in the publications of Bornet and Thuret. 
Dasya differs sharply from most other Rhodomelaceae in 
the fact that its axis is, as was shown long ago by Kny (9), 
a sympodium. The allied genus Heterosiphonia , Mont., 
recently re-established by Agardh (10) and Schmitz (8 a), 
alone seems to share with Dasya this peculiarity. It might 
fairly be expected that so profound a difference of structure 
as that between plants with monopodial and sympodial axes 
would be accompanied by other differences, possibly in the 
structure of the procarp. 
The procarps of Dasya coccinea arise in great numbers close 
up to the growing apex of the plant. They are usually borne 
on the fourth joint from the sympodial axis. In these cases 
