Buffers: liagoka an'd r.Af.AXAURA. 1/5 



The lowest cells are large and rounded, giving rise to many of the 

 smaller medullary filaments. The upper are cylindrical, about 

 10 mic. in diameter and three to four times as long, the uppermost 

 cylindrical or somewhat oval, the terminal cells averaging about 

 10-15 mic. Cystocarps small, with a few simple filaments forming 

 the involucre. 



FAMILY CHAETANGIACEAE. 



Galaxaura. 



Key to Sections of Galaxaura. 



L Superficial parenchymatous layer without short, free assim- 

 ilatorv structures : 



1. Parenchymatous layer not readily separable into fila- 

 ments ; epidermal cells flattened, bearing long, scattered, hair- 

 like filaments. 



II. Microtlwe^ 



2. Parenchymatous layer loose, separable into monili- 

 form filaments ending in a compact parenchymatous epidermis, 

 usually without hair-like projecting filaments. 



IV. Eugalaxaiira. 

 II. Superficial parenchymatous layer bearing short, free pro- 

 jecting assimilatory structures. 



1. Distinct epideruiis wanting; short assimilatory fila- 

 ments several-celled. 



VI. Brachycladia. 



2. Distinct epidermis present, bearing one-celled assimil- 

 atory papillae. 



VII. Veprccnlae. 



Section II. Microthoe Dcsne J. G. Ag. 



Galaxaura glabriuscula Kjellm. Om Floride-Slagtet Galax- 

 aura. S6. 1900. 



Frond loose, patently pinnately forked, at length decompound, 

 with solitary not crowded proliferations, subglabrous, below with 

 small villous patches ; filaments straight, elongated, up to 450 mic. 

 in length, and 18 mic. thick; fragile, yellowish, above densely trans- 

 versely rugulose ; lower internodes obconical, up to 2 mm. thick 



*The num.bering of the sections of Galaxaura corresponcis with that in 

 KjeHnian's monog-iTaph. . In my collection there are no representatives of his 

 sections Rho(htra, PapuUfer. Heterotrichum. Laevifrons and Dichotomaria. Tlie 

 sections as liere used liave the limits assigned to them by Kjellman. 



