Ranales , Rhoeadoles , and Rosales. 705 
R. flammula conforms to the general features of the genus, with some 
peculiarities obviously due to the water habit. 
Chauveaud has described half a dozen additional species which do not 
appear to differ from those described above. 
R. Ficaria (Text-fig. 9). The morphology of this species has given 
rise to much discussion. The cotyledonary member appears to be quite 
single, and it is traversed by a single strand. As in the other species the 
primary root is diarch. At the cotyledonary node the greater part of 
the vascular tissue passes upwards into the cotyledon and is continued as 
its central strand. From the same region the vascular strand of the first 
leaf has its connexion. The exact relationship of these vascular strands 
will be discussed in a subsequent paper. 
Text-figs. 6-9. 6, Ranunculus acris ; 7, R. gramineus ; 8, R. heeler aceus ; 9, R. Ficaria. 
6, 7, and 8 § nat. size ; 9 x 2 \. 
The seedlings of the genus Clematis are distinctly more robust than 
those of Ranunculus and Anemone . Nine species have been examined, and 
the chief interest lies in the two species C . viticella and C. Hendersoni , in 
which there are vascular strands in the intercotyledonary plane of the 
hypocotyl, which are continued upwards as the lateral bundles of the 
cotyledon. (See PL L, P'ig. 6, Liriodendron Udipifera . ) 
Clematis vitalba. The transition is high, and the vascular bundle of the 
cotyledon is double at the node. The diarch plate is found at a short distance 
below the node, and consists of a radial file of vessels. 
Clematis flammula (Text-fig. 10). This species forms a short cotyle- 
donary tube. The bundles of the cotyledons are double for some distance 
above the cotyledonary node, and connect with the diarch root in the usual 
