188 



Dansk Botanisk Arkiv, Bd. 3. Nr. 1. 



absolutely with my plant, with its mostly opposite branches, when 

 it is said in the diagnosis: "alterne ramosa vel subdichotoma". 

 Thus an examination of the original material was highly 

 desirable, and I am greatly indebted to M«"^ Weber for the per- 

 mission to examine the original material sent by Momtagne to 

 KüTZiNG and preserved in his herbarium, now in the possession 

 of Mn^e Weber. This specimen has also a special interest on 

 account of the fact that the only existing illustration of this 

 species, namely that in Kützing's 'Tabulæ" (1. c), is based upon it. 



After the examina- 

 tion of the material 

 it at once became evi- 

 dent that it was a 

 mixture of two spe- 

 cies present in nearly 

 the same quantity, 

 namely a form of the 

 plant which I in a fol- 

 lowing page call Jania 

 adhaerens and another 

 plant, the present one, 

 for which I keep the 

 name cubensis. It is 

 interesting to see that 

 KtJTZiNG very correct- 

 ly has illustrated both 

 species, his fig. d re- 

 presenting Jania ad- 

 Fig, lib. Corallina cubensis (Mont.) Kütz. Upper r,^.„._,_ „,i,-i„ fi„„ ^ 

 part of a plant with more or less verticillated naerens wnne ngs. e 

 branches and a tetrasporicconceptacle. (About 16:1). and / are Corallina 



cubensis. 



Before entering upon a description of this plant I further want 

 to point out that in my specimens, too, Jania adhaerens is often 

 abundantly present. Besides, Corallina cubensis also, often grows 

 intertwisted among Amphiroa jragilissima. 



After these introductory remarks I shall proceed to give a 

 description of the plant based upon my own material. 



Corallina cubensis grows upon rocks and corals and forms 

 low dense tufts about 1 — 2 cm. high, often spreading widely. 



The slender filaments are densely crowded, fastigiate and 

 mixed up together. The branches issue as a rule immediately 

 below the nodes (Fig. 174), but the ramification is very irregular. 



