Draparnaldia 219 



Pennsylvania: Chester county, 1890 (H. M. Richards). 



Indiana: Greencastle, October, 1893 (L. M. Underwood). 



Montana: Great Falls, September, 1885 (F. W. Anderson). 



This species usually has closely set, plumose fascicles of densely 

 crowded branchlets. More slender or less branched forms are often 

 called D. plumosa pulchella Rabenh., but there is some reason to 

 believe that Kiitzing's D. pulchella may be a more distinct form. 



Some of the material above quoted from Haverhill, Mass., seems 

 to correspond to Kiitzing's description of D. pulchella in having 

 longer, more ventricose cells. Without further collection, how- 

 ever, we cannot regard it as more than a young stage of D. plu- 

 mosa. 



2. Draparnaldia acuta (Ag.) Kiitz. Phyc. Germ. 230. 1845 ; 



Spec. Alg. 356. 1849; Tab. Phyc. 3: pi. 13. f. 2. 1853 



D. glomerata acuta Agardh, Syst. Alg. 59. 1824. Rabenh. 

 Flor. Eur. Alg. 3: 382. 1868. DeToni, Syll. Alg. 1: 192. 

 1889. DeWild. Flor. Alg. Belg. 43. 1896. 



Tufts 1-8 cm. long; branches ascending or spreading, solitary 

 or opposite, somewhat moniliform ; the fascicles of branchlets 

 single, opposite or whorled, generally somewhat crowded, ascend- 

 ing or spreading, broadly ovate to lance-ovate and acuminate in 

 outline ; branchlets in the fascicle ascending, the rachis usually 

 extended at the apex ; • ultimate branchlets subulate or setiferous, 

 often curved ; cells of larger branches somewhat inflated, or above 

 nearly cylindrical, 50-90 or more, rarely 110 fi in diameter, 1—2 

 times as long, chlorophyll band half as wide as the cell-length or 

 narrower; diameter of terminal branchlets 6—10 fi. 



Exsic. : Tild. Am. Alg. 12 C. (as D. plumosa), Forest Grove, 

 Ore., February, 1896 (F. E. Lloyd.) (?) 



In brooks, rills, and semi-stagnant waters. 



Connecticut: Thomaston, May (541, 546, 565, 566). 



New York : Bronx Park, May (370, 408) ; East Chester, May 

 (391), November (518). 



New Jersey: Hudson Heights, May (433); Cresskill, May 

 (358) ; Undercliff, May (572). 



This form has usually been considered a variety of D. glomer- 

 ata, but it appears to be equally or more closely related to D. 

 plumosa. It frequently exhibits, to be sure, the spreading habit 

 of branching, the broad fascicles of branchlets, and the inflated 



