120 University of California Publications in Botany [Vol. 6 



more or less elongated earpostome; gonimoblasts projecting into and 

 also lining the walls of the sporiferous cavity, variously grouped and 

 abjointing successively more or less elongated spores; paraphyses 

 absent; periderm distinct, pseudoparenchymatous ; growing point 

 slightly depressed, as in Scinaia. 



A genus of two species, one, the type, from Southern California, 

 the other from southeastern Australia. Both these species have all the 

 external appearance of being genuine species of Scinaia. In habit, 

 however, there is a slight difference in that the branches are not at 

 all attenuated downwards as is the case in practically all species of 

 Scinaia. In vegetative structure Pseudosci'naia is exactly like Scinaia 

 in having the epidermis of colorless utricles. The cystocarps, however, 

 are very much like those of Galaxaura and Whidheyella, from both of 

 which it differs in the structure of the epidermis. It seems best there- 

 fore to create a new genus for the reception of these two species and 

 the name Pseudoscinaia is proposed for it. 



Pseudoscinaia. Snyderae sp. nov. 



Plate 16, figs. 60, 61. 



Plant dark red, 12-20 cm. high, 9-13 times dichotomous, cylin- 

 drical, continuous ; axils narrow ; branches not narrowed downward 

 but nearly uniform in diameter throughout, 1-2 mm. in width (dried) ; 

 axis distinct (dried) ; cystocarps abundant, scattered, small, readily 

 seen (dried) ; — axial strand stout, of numerous broad parallel fila- 

 ments strongly agglutinated together; epidermis of irregular colorless 

 cells, or utricles, and frequent scattered slender colored cells ; utricles, 

 of the epidermis, convex at outer end and not closely appressed at the 

 tips thus giving an irregular and onlv bluntlv polvgonal appearance 

 in .surface view (T). low palisade-like. 20-26/^ (R) by 12-20/^ (T) ; 

 hypodermis of 1-3 (?) layers (mo.stly one), of loosely placed globular 

 or pyriform cells ; corticating layer broad, compact ; antheridia single 

 or in small (2-4 together) clusters, scattered through the epidermis; 

 cystocarps globular to globular pyriform below, narrowed abruptly 

 into a slender earpostome, 165-205/a (T) by 130-170/i, (R, exclusive of 

 the earpostome), but the earpostome itself is 15-lOOfx long; gonimo- 

 bla-sts spreading out from a few-celled placenta, lining the ba.sal half 

 to two-thirds of the sporiferous cavitj^, curving up and bearing short 

 branchlets successively abjointing elongated pyriform spores, somewhat 

 grouped ; periderm of 4-5 layers, pseudoparenchymatous. 



The specimen chosen for the type of the genus Pseudoscinaia and 

 of the species Pseudoscinaia Snyderae is No. 77886 of the Herbarium 

 i)f the University of California. It was collected at "Pacific Beach" 



