126 RHODYMENIACEAE 
flabellifolia. In R. flabellifolia the main axes, after a few dichot- 
omies near the base, bear numerous rather short lateral irregularly 
alternate or multifarious flabellately dichotomous often contorted 
or crisped foliar expansions, many of which have the habit of 
innovations or proliferations. In R. corallina, the thallus is, on 
the whole, except for occasional proliferations, plane and соп- 
sistently dichotomous. Іп R. flabellifolia the cystocarps аге some- 
| what apiculate ог subcoronate; іп В. corallina the cystocarps, so 
far as we have observed, bear no trace of an apiculum or crown. 
From published descriptions and from Dr. Coker’s field notes it 
would appear that plants of the two species differ in color, R. 
flabellifolia being purplish, while В. corallina is coralline-red, but 
in our fluid-preserved material this distinction is hardly perceptible. 
RHODYMENIA PERUVIANA J. Ag. (Sp. Alg. 2: 378. 1852), а 
photograph (FIGURE 40) of the original of which we owe to the: 
courtesy of Professor Nordstedt, was apparently not collected by 
Dr. Coker. Thisisa past of = кенеле habit of R. palmata—a 
plant with broader seg t than R. corallina. 
The original specimen is about 16.5 cm. long and its segments are 
0.75-2.25 cm. broad. It is said to have come from the southern 
shores of Peru, and it possibly does not occur within the present 
limits of the country. 
Rhodymenia chiloensis Mont.* (“ chilensis” of J. Ag. and of 
De-Toni), described from the island of Chiloe, is cited as a synonym 
of R. corallina by De-Toni (Syll. Alg. 4: 516. 1900), but this is 
evidently an error. Rhodymenia chiloensis is described by Mon- 
tagne as having the structure of R. Hombroniana and R. Hombron- 
iana manifestly belongs to Callophyllis, as is now generally recog- - 
nized. Photographs of the original specimens of R. chiloensis 
we have been able to examine through the courtesy of Professor 
Mangin and M. Hariot of the Muséum d'Histoire Naturelle in 
Paris. The plants have the habit of a Callophyllis and obviously . 
have nothing to do with Rhodymenia corallina. The original 
specimens vary greatly in size and width of the segments of the thal- 
lus, the plants ranging - in length from about 7 cm. to 28 ст. ang 
* Ann. Sci. Nat. Bot. III, 18: 316. 1852; also in C. Gay, Hist. Fis. y Pol. Chile 
Bot. 8: 300. 1852. 
