58 Cyclos|)oi'in33, Sargassaceas, Sargassum. 



ke omues superiores iiiferioresque uiinutc"e. diametro 2,2 millim. vix 

 excedontes. 



89. Sargassum Biserrula J. Ag. Sp. I, p. 318, Sp. Sarg. Austral. 

 p. 94, t. XXYII, IV, Kuetz. Sp. p. 626, Sargassum squarrosum 

 Grev. in Ann. and Mag. of Nat. Hist. Vol. III, p. 254 et in Trans. 

 Bot. Soc. tab. XI (plantae inferior pars), Sargassum distichum Sond. 

 Alg. Preiss. p. 15 ??. — Rachidibus ramorum subcompressis, quo- 

 quoversum decomposito-ramosis ; foliis interiore margine subex- 

 cisis, inferioribus latiusculis, obovatis obtusis, argute serratis. cry- 

 ptostomata sparsa gerentibus, superioribus lineari-lanceolatis, co- 

 statis et unica utrinque serie cryptostomatum instructis, serratis 

 aut integriusculis ; vesiculis in petiolo subcompresso ipsas circum- 

 circa marginante obovatis, muticis, adultioribus sph^ericis ; recepta- 

 culis ex ancipite triquetris, decomposito-ramosis, serratis, demum in 

 ramulo fertili racemosis. 



Hab. in oceano Indico ad littora Indostaniffi (Wight in Hb. 

 Hooker) et NoVcC Hollandiae (J. Ag.\.rdh). — Rachides teretiuscul;ie 

 et vix conspicue compressre undique levissim;i3 elongata? penn;\ p;is- 

 serin;l vix crassiores, ramis conformibus 3-4 cm. distantibus or- 

 natse. Folia inferiora multo breviora quam in Sargasso cincto J. 

 Ag., vix 4 cm. longa, cuneato-obovata, apice saepe obtusissimo, 

 costa infra apicem evanescente et cryptostomatibus sparsis munita, 

 superiora multo angustiora, fere lineari-lanceolata, alia (inferiora 

 r;imorum) serrata et magis lanceolata nervoque conspicuo percur- 

 sa. alia (r;imulorum superiorum) magis linearia et integriuscula, 

 costa minus conspicua instructa, plurima utrinque unica serie 

 cryptostomatum munita. Vesicuke juniores sa^pe obovata; ut petiolo 

 plano nunc circumcirca marginante fulta^ ;idultiores sphiericse, ma- 

 gnitudine seminis Piperis. Receptacula 7-10 mm. longa, ancipiti;i, 

 margini])us serratis, supra medium semel torta et fere triquetra. 

 simplicia, pedicellata, in racemo axillari 3-4 fructus gerente dispo- 

 sita, demum in ramorum apicibus paniculata. — Var. singapurenss 

 Grunow in Piccone Alghe della Vettor Pis;\ni, p. 45: caule....; 

 r;imis elongatis, teretiusculis vel anguUitis, levibus. remote ramo- 

 sis, ramis e basi subretrofracta erecto-patcntibus iterum ramulo- 

 sis; foliis lineari-lanceolatis, nervo ante apicem evanescente per- 

 cursis. miiuite biseriatim ghindulosis, integerrimis vel dent:itis, ri- 

 gidis, sordide nigrescentibus; vesiculis spluBricis, muticis, petiolo 

 tereti ipsis plerumque breviore ; receptaculis planis, subfoli;iceis vel 

 subtriqiietris. tortis, ov;itis vel linoari-huiceolatis. ;irgute serra^o- 



89 



