Chaetophora 211 



i. Chaetophora elegans (Roth) Agardh, Disp. Alg. Suec. 42. 



1812 ; Syst. Alg. 27. 1824. Lyngb. Tent. Hyd. Dan. 192 



(excl. syn.) pi. 65. 18 19. Hassall, Brit. F. W. Alg. 127. pi. 



p./ j, 4.. 1845. Kiitz. Spec. Alg. 532. 1849; Tab. Phyc. 



3: pi. 20. / 1. 1853. Rabenh. Flor. Eur. Alg. 3: 384. 1868. 



Wood, F. W. Alg. 210.//. 6./. 5. 1873. Cooke, Brit. F. W. 



Alg. 194. pi 78. /. 2. 1883. Wolle, F. W. Alg. 1 16. pi. 103. 

 f. 4-10. 1887. DeToni, Syll. Alg. 183. 1889. 



Rividaria elegans Roth, Neue Beitr. Bot. 1 : 269. 1802.* 

 (Ann. of Bot. 1: 259. 1805.) 



Batrachospermum intricatum Vauch. Hist. Conferv. 1 17. pi 12. 

 f. 2, j. 1803. DeCandolle, Flore Franc. 2: 58. 1815. 



Chaetophora longipila Kiitz. Phyc. Germ. 261. 1845 ; Tab. 

 Phyc. 3 : pi 17. / 1. 1853. Wolle, F. W. Alg. 118. pi 103. /. 

 16, 17. i887.(?) 



C. cervicornis Kiitz. Tab. Phyc. 3: 5. pi up./. 2. 1853. 



C. elegans cervicornis Rabenh. Flor. Eur. Alg. 3: 384. 1868. 

 DeToni, Syll. Alg. 1 : 183. 1889. 



C. elegans longipila Hansg. Prod. Alg. Bohm. 1 : 70. 1886. 

 DeToni, Syll. Alg. 1: 183. 1889. 



Colonies globose or more often tuberculose, 1-10 mm. in 

 diameter, light green in color, the gelatinous substance rather soft, 

 frequently confluent ; filaments radiating from the center, dichoto- 

 mously or trichotomously branched, penicillate at the summit ; 

 branches lax and somewhat spreading, above sometimes crowded 

 and erect ; terminal branchlets short pointed or setiferous ; cells 

 of main branches about 8 p (6— i i /j.) in diameter, 3-10 times as 

 long ; terminal cells 5-7 /1 in diameter (//. 37). 



Attached to leaves, sticks and stones, in brooks and stagnant 

 waters. 



New York : Van Cortlandt Park, April-June (344, 602, 636) ; 

 Botanical Garden, April (81, 274, 354), May (387), June (441, 

 442) ; East Chester, May (392). 



New Jersey : Hudson Heights, April (302) ; Grantwood, 

 March-May (4, 13, 367, 440) ; Greenwood Lake, September (465). 



Washington: Whidley Island, July, 1901 (N. L. Gardner). 



There is to be found in this species every degree of variation, 

 from tiny, globose specimens up to large tuberculose and con- 



* Citation from Roth, Cat. Bot. 3 : 337. 1806. 



