1914] Setchell: Parasitic Florideae, I 19 



There remain to be oonsidered briefly the interrelationships of the 

 species of JanczewsJcia. The species may be divided into two groups 

 on account of their more obvious resemblances, of which the first may 

 receive J. verrucaeformis and J. Solmsii and the second the remainder 

 of the species, but which certainly includes J. moriformis, J. Gardneri, 

 and J. lappacea. J. tasmanica, undoubtedly, belongs to the second 

 group, but our knowledge of it is, as yet, fragmentary. 



The members of the first group, viz., J. verrucaefonnis and J. 

 Solmsii, are practically devoid of free branches, the projecting cysto- 

 earps hardly counting as such. Besides the absence of free branches, 

 these two species differ from those referred to the second group in 

 the shape of tlie antheridial tufts and their arrangement in the anthe- 

 ridial conceptacle. In Janczeivskia verrucaeformis and in J. Solmsii 

 the antheridial tufts are as broad as. or broader than, they are long, 

 being bouquet-like rather than elongated plumose, and occupy the 

 base and but very little of the sides of the antheridial receptacle, thus 

 giving the conceptacles a very characteristic appearance in radial 

 section. Since Janczeivskia verrucaeformis is the type of the genus, 

 it is proposed that this section of the genus be called Eu janczeivskia. 

 The second section of the genus may similarly be designated as Hetero- 

 janczeivskia. The four species, viz., J. moriformis, J. Gardneri, J. 

 lappacea, and J . tasmanica, assigned to this section agree in having a 

 greater or less, but always, if we except perhaps the antheridial plant 

 of J. moriformis, a decided development of free, armlike branches. 

 The antheridia of the species of this section, with the exception of 

 J. tasmanica, where they are not yet described, are long plumose and 

 line the whole antheridial conceptacle, radiating from the point of 

 attachment on the wall towards the center of the conceptacle. 



In the species of Hetero janczeivskia the length of the free branches 

 varies, being least in /. moriformis, where the antheridial plant is 

 nearly, or at times, quite devoid of them, through J. Gardneri, where 

 they are of intermediate length, to J. lappacea and J. tasmanica. which 

 have the longest free branches. 



At the close of this account these various relationships will be 

 brought out in connection with the formal diagnoses attached to the 

 new names proposed. 



