108 University of California Publications in Botany [Vol. 6 



Scinaia Salicornioides (Kuetz.) J. Ag. 



Plate 11, figs. 28-30. 



J. G. Agardh., Spec. Alg., vol. 2, 2, p. 423, 1851; ibid., vol. 3, 1, p. 513, 



1876; 

 Barton, Journ. Botany, vol. 31, p. 144, 1893; ibid., vol. 34, p. 197, 1&96; 

 De Toni, Syll. Alg., vol. 4, sect. 1, p. 106, 1897. 

 Ginnania Salicornioides Kuetzing, Spec. Alg., p. 716, 1849; Tab. Phyc, vol. 16, 

 p. 25, pi. 70, 1866. 



Plant dark red, up to 26 cm., 7-11 (or more?) times dichotomous, 2- 

 3 mm. broad (dried), frequently but irregularly constricted, dense and 

 opaque; axis invisible (dried) ; cystocarps scattered; — axis stout of 

 broader thin walled filaments and more slender thick walled filaments 

 intermixed; epidermis palisade-like, of slender elongated utricles and 

 no colored cells or antheridial filaments (so far as seen) ; utricles 

 radially elongated, 28-35/x (R) and 6-9/x (T), flat topped and closely 

 placed together; colored hypodermal cells in 2-3 layers, globular to 

 pyriform ; corticating layer very broad, very dense in older portions ; 

 antheridia not seen; cystocarps flattened globular, 240-250/a (T) and 

 about 200/A (R), with a thick periderm of 6-8 fibro-pseudoparenchy- 

 matous layers. 



Scinaia Salicornioides is the largest and most robust of all the 

 species of Scinaia. The figures of Kuetzing (1866, pi. 70) give a very 

 good idea both of habit and of structure. The palisade-like layer of 

 utricles, the broad, dense corticating layer and the stout central axis 

 distinguish it readily from all except Scinaia carnosa, and from the 

 latter species it is to be distingui.shed by the size and proportions of 

 the utricles as well as by the greater width and density of the 

 corticating layer, 



Scinaia Salicornioides is confined, so far as known, to the shores 

 of South Africa. The original specimens were collected at Port Natal, 

 by Guenzius. Through the kindness of i\Ime. Weber van Bo.sse, I have 

 been able to make a microscopic examination of this specimen. It 

 has also been collected at The Kowie by Dr. H. Becker and at Cape 

 Morgan by Danvers (cf. Barton, 1893, p. 144). I have drawn the 

 description chiefly from a Becker specimen kindly loaned by F. S. 

 Collins. It is very desirable that living specimens be studied to deter- 

 mine more accurately the structure of the cystocarp and the details 

 of the occurrence and structure of the antheridia. 



Since 1851, when J. G. Agardh (p. 423) placed it as a doubtful 

 synonym under Scinaia Salicornioides, the CoraMopsis dichotoma Suhr 

 (Flora, vol. 22, p. 70, fig. 44, 1839) has regularly appeared in the 



