Ulothrix 157 



Doubtful Species 



Ulothrix moniliformis Kiitz. Spec. Alg. 347. 1849; Tab. 

 phyc. 2: //. 88. f. 4. 1852. 



Hormidium moniliforme Kiitz. Phyc. Gen. 244. 1843. 



Hormiscia moniliformis Rabenh. Flor. Eur. Alg. 3: 361. 1868. 

 Cooke, Brit. F. W. Alg. 179. pi. jo. f. 1. 1883. 



Light green, more or less crisped, torulose, 1 1 — 14 // in diam- 

 eter ; cell- wall thickened. 



Exsic : Phyc. Bor. Am. 612. East Haven, Conn., April, 1894 

 (W. A. Setchell). 



This specimen is certainly a form of Ulothrix and corresponds 

 exactly to Kiitzing's figure and description. Whether it is a dis- 

 tinct species, or only a condition of some other species with a 

 thickened cell-wall, cannot at present be determined. 



Wolle records this species as collected by Austin in sphagnum 

 swamps in New Jersey (Bull. Torrey Club, 6 : 188. 1877), but the 

 specimen in the Wolle herbarium is composed of Microspore/, floe- 

 losa in the akinete stage. The same may be said of Ulothrix 

 lacustris Hiise ; Rabenh. Alg. Eur. 1540, which is quoted as a 

 synonym of U moniliformis in Rabenh. Flor. Eur. Alg. 3: 361. 

 1868. Probably Wolle finally recognized the true character of 

 his specimens, for no mention is made of the species in the Fresh 

 Water Algae. 



Ulothrix subtilis thermarum Rabenh. Flor. Eur. Alg. 3 : 

 365. 1868. Hansg. Prod. Alg. Bohm. 1: 59. 1886. Wolle, 

 F. W. Alg. 136.//. 118. f. 18, 19. 1887. DeToni, Syll. Alg. 

 1 : 160. 1889. 



Exsic: Rabenh. Alg. Eur. 2368, June, 1877. Bethlehem, 

 Pa. (F. Wolle). Wittr. & Nordst. Alg. Exsic. 419. Bethlehem, 

 Pa. (F. Wolle). 



Ulothrix flaccida caldaria (Kiitz.) Hansg. Prod. Alg. 

 B6hm. 1 : 61. 1886. 



Gloeotila caldaria Kiitz. Phyc. Germ. 191. 1845 ; Spec. Alg. 

 363. 1849; Tab - Phyc- 3- P l -3 2 -f- 3- 1853. Rabenh. Flor. 

 Eur. Alg. 3 : 320. 1868. 



Hormiscia flaccida caldaria Hansg. Flora, 7 1 : 265. 1888. 

 DeToni, Syll. Alg. I: 162. 1889. Tilden, Bot. Gaz. 25: 91. 

 pi. 8. f. 4,5. 1 



