1 UK S 11 -WATER ALG^ O F Til E U M T E D 8 T A T E S. 207 



Genus DRAPARNALDIA, Ao. 



Filaartirnlata rnmosa. c n-llulis magnis, maximc hyalinis, fascia chlorophyllosa lotinsoulo ornatis, 

 .-. ni|"-r Mrrililms furinutu, fasciculi* penicillato-raiuulogiBsimis, e ccllulis ininoriluis fcriililnis com- 

 l, plus minus di-n>r obtsessa, Articuli UTtuiualcs omnium ruuiuluruiu iuaiius achroi utcriles, in 

 jiiiniu hvalinum plus minus clougatL 



Filaments articulated, branched, formed of large cells which are chiefly hyaline, but famished with 

 a inin.-ver.-c chlorophyllous fascia, more or less densely clothed with penicillately ramulose fasciculi, 

 firmed of smaller fiTtilc cells. Teruiiual articles of all the joints empty, transparent, sterile, aud 

 elongate, in a more or less hyaline hair. 



D. lomrrata, (VAUCH.) Ao. 



D. filis rnmi.-i|iie primariis achrois yel snbachrois, ad 0.00147" crassia, articulis inferioribus 

 diamctro xqualibus vel paulo brevioribus, guniculis manifesto constrictis, fasciis chlorophyl- 

 losis angustis dilute viridibus; raniis primariis snbrectangiilo-patcntibus, saepe oppositis ; 

 ramiilnnini fasciculis confertis, patcntibus, altvnyutibus vt-1 oppositis, dense ramellosis, sub- 

 ovalibus, obtusis. (11.) 



Syn. D glomerata, (VAUCDER) AoARDn. BABENHOBHT, Flora Europ. Algarum, Sect. HI. 

 p. 38. 



Hal. Rhode Island; (S. T. Olney) Thwaitcs. 



Fihiint-iit and primary branches colorless or Bubcolorleas, and reaching 0.00147" in diameter, 

 I.'U.T articles about as long or a little shorter than broad, manifestly constricted at the 

 joints, chlorophyl fascia narrow, light green ; primary branches subrectangularly patent, 

 often opposite; fasciculi of branches crowded, patent, alternating, or opposite, densely 

 ramellose, suboral, obtuse. 



Renwrks. According to M. Thwaites the true Dr. glomerata grows in Rhode 

 Inland, as he so identified specimens sent to him by Mr. Olaey. These specimens 

 ui re, however, in all probability dried, and if this was so, I confess not to attach- 

 ing much weight to the identification. The Draparnaldia, common near Philadelphia, 

 once so like and yet so different from the description of D. glomerata, that I 

 ;iin unable to fully satisfy myself whether it be a variety of the European species 

 or distinct from it. It differs very greatly in the thickness of the stem and pri- 

 mary branches. I have given above P'-of. Rabenhorst's description of the Euro- 

 pean variety, and now append one of tin plant growing in this neighborhood. 



Tar. maxima. 



Dr. filis achrois, ad 004" crassis, articnlis plerumqne diametro duplo longioribns, in mcdio 

 epe valde tnmidis; ramis primariis achrois vel subachrois, oppositis vel alternantibus vel 

 ternatis, elongatis, dense ramellosis, cum ramulis lanceolatis ; ramalornm extremorum 

 fasciculi's dense raraelosis, ovatis vel late lanceolatis, plerumque confertis; ramulorum 

 articnlis inferioribns plernmque diametro (ad YiW) subaequalibus, articulifl superioribus 

 diamctro duplo ant triplo longioribus, plerumque piliferis. 



Hah. Prope Philadelphia ; Wood. 



Filament transparent, attaining a diameter of 0.004", its articles mostly twice as lonjr ns 

 broad, strongly swollen in the middle ; primary branches colorless or subcolorless, opposite, 

 alternate or ternate, elongate, densely ramellose with the ramuli lanceolate ; fasciculi of 

 extreme branches densely ramellose, ovate, or broadly lanceolate, mostly crowded, inferior 

 articles of the branches mostly about as long as broad (nV"). superior articles two to three 

 times as long, mostly pilifcroua. 



