Library 



NEW YORK 



BOT 



PARASITIC FLORIDEAE, II 



BY 



WILLIAM ALBEET SETCHELL 



In 1914 (Univ. Calif. Pub. Bot., vol. 6, no. 1, pp. 1-34), pi. 1-6) 

 I published what was intended to be the first of several papers on the 

 floridean parasites, especially on floridean hosts. The publication of 

 other species than those of Janczewskia has been delayed by pressure 

 from other projects. 



In 1918 (Proc. Am. Philos. Soc, vol. 57, pp. 155-172), I reviewed 

 the progress made in our knowledge of the parasitism of the Red 

 Algae and (pp. 165, 166) referred to certain unnamed species in my 

 possession, but as yet unpublished. 



It seems best, therefore, to publish the diagnosis of several new 

 genera and species, awaiting the completion of the work of more 

 thorough illustration and the drawing up of more complete descrip- 

 tions?, which are, however, in advanced preparation. 



Gracilariophila Gardner! sp. nov. 



Frondibus 3-3.5 ram. diam., albido, depresso-tuberculiformibus 

 tetrasporiferis superficialiter laevigatis, cystocarpiferis superficialiter 

 cum cystocarpiis mammillatis ; tetrasporangiis per frondem totam, 

 sub superficiem, regulariter s]')arsis, cruciatim divisis; cystocarpiis 

 superficiem frondis totam tegentibus, proeminentibus. placentis 

 exiguis, sporis catenatis, carpostomi apicali, pericarpio crasso, stratis 

 cellularum numerosis, cellulis, internis majoribus, hyalinis, externis 

 angustis. coloratis, in seriebus anticlinis ordinatis, superficialibus 

 verticaliter elongatis, composito. 



Parasitic on Gracilaria Cvnninghamii J. Ag., near Santa Monica, 

 California, January, 1913, N. L. Gardner, No. 2576. 



Gracilariophila seems to be quite distinct from HarveyeUa (cf. how- 

 ever, Eddelbiittel. Bot. Zeit., vol. 60, p. 230, 1910) and G. Gardneri 

 is a larger species than G. orfizoides Setch. and AVilson. with cystocarps 

 projecting more conspicuously. 



