220 CHAETOPHORACEAE 
lower cells, which are characteristic of D. glomerata ; but even in 
these points, especially toward the end of the branches, it often 
resembles more closely D. plumosa, while it invariably shows, in 
common with the latter, a very distinct, long rachis in the fascicles 
of branchlets. This last character is of greater phylogenetic im- 
portance than the others. Itis very easy to derive the simpler 
forms of D. plumosa from one of the larger Myxonema species, and 
then through such an intermediate form as D. acuta, to arrive at 
D. glomerata. 
Draparnaldia plumosa and D. glomerata as here restricted are 
very readily distinguished. When D acuta is made a variety of 
the latter, the species immediately become confused and separation 
is at times difficult. The present disposition contributes much to 
clearness. Repeated observation at the same station has convinced 
us that D. acuta is, in spite of its variability, a reasonably distinct 
form. If, however, it is to be reduced from specific rank, it should 
undoubtedly, in our judgment, be made a variety of D. plumosa 
rather than of D. g/omerata. 
Km 
DRAPARNALDIA GLOMERATA (Vauch.) Agardh, Disp. Alg. Suec. 
41. 1812; Alg. Dec. 37. 1814; Syst. Alg. 58. 1824. Lyngb. 
Tent. Hyd. Dan. 189. ۸/۰ 64. 1819. Hassall, Brit. F. W. Alg. 
120. pl. 13. f. 7. 1845. Roemer, Die Ale Deutsch. a 2. 
f. 25. 1849. Katz. Spec. Alp. 356. 1849; Tab. Phyc. 3: 
pl. 12. 1853. Harvey, Ner. Bor. Am. 3: 72. 1857.  Rabenh. 
Flor. Eur. Alg. 3: 381. 1868. Wood, Hist. F. W. Alg. 207. 
1873. Cooke, Brit. E. W. Ale 191. ». 76. f. 1, 2. 1883. 
Wolle, F. W. Alg. 108. ai 92. 1887. Saunders, Flora of 
Neb. 1: 65. M. 19. f. 2. 1894. 
Batrachospermum simplex DeCand. Bull. Sci. Soc. Phil. 3: 2 
p. P 1802.* 
* DeCandolle quotes as synonyms for his WE mum simplex, C wen 
gelatinosa Girod, Rech. Chim. et Mic. 33. ai 5. 1802, and Vau — s کرس‎ rva in- 
édite, Bull. Sci. Soc, Phil. 2: ۸ کر .ور‎ 4 1802. The former is B 
the latter is undoubtedly مویکو ار‎ glomerata, but a an name یش‎ in this 
way, on two diverse elements withou a Masse to be recognizable apart from 
the synonyms can hardly displace nis a we unded name as Draparnaldia 
erata. It is noticeable that under the deis species, Vaucher makes no reference to 
his earlier figure. 
