H72 Rhodomele.e. Basya. 



CXLTX. Dasya C. Arj. Sijst Alg. n:o 78. Spec. Alg. II. p. 

 116. J. Ag. Symh. p. 29. Harvey Br. Fl. p. 334. Ner. Atistr. 

 p. 57. et Ner. Bor. Americ. p. 59. Endl G-en. Pl. Stippl. III. 

 p. 44. Gaillona Bonneni. Hydr. p. 65. Rhodonema Mart. 

 Eeis. tah. 8. Stichocarpus Ag. in Flora 1827 p. (i36. Aspe- 

 rocaulon Grev. Edin. p. 309. Dasya et Dasyopsis Zanard. 

 Sagg. Dasya, Lophothalia, Eupogonium, Trichothamnion, Eu- 

 pogodon Kiltz. Phycol et Sp. 



Frons coccinea plana aut tiliformis, distiche aut quoquoversum 

 ramosa polysiphonia, celhilis nempe 4 — 12 circa centralem 

 in orbem dispositis tequelongis contexta, siphonibus nudis 

 articulata aut cortice celluloso obductis continua, apice aut 

 deorsum longius ramulosa, ramulis coloratis apice aut per 

 totam longitudinem monosiphoniis. Keramidia ovato-glo- 

 bosa aut ampullseformia, in ramo minore obliqua et ssepe 

 calcarata, intra pericarpium cellulosum carpostomio aper- 

 tum gemmidia pyriformia in articulo terminali filorum a 

 placenta radiantium foventia. SticMdia siliquseformia, a 

 ramo monosiphonio aut polysiphonio transformata, intra 

 articulos sphserosporas numerosas verticillatas aut (raro) 

 pauciores, nunc linea spirali dis^ositas, triangule divisas 

 foventia. Antheridia lancoidea conica ad ramos sessilia. 

 (Kiitz. Phycol. gen. Tah. 50. /; 51. II 



Frondes ancipites compressse aut filiformes, simpliciusculse 

 aut iterum iterumque ramoste, per totam longitudinem ramulosae 

 aut inferne ramulis denudatse superne penicillatee, juniores aut 

 parte suprema juvenili articulatee, adultiores aut totse articulutse, 

 aut plus minus corticataj, ssepe cortice densiore continuee. Rami 

 frondi conformes, dichotomi aut pinnatim divisi, distichi aut 

 quoquoversum exeuntes, apice aut deorsum longius ramulosi. 

 Ramuli in sectionibus aut subgeneribus diversis dispositione et 

 structura dissimiles; in Heterosiphonia et Stichocarpo sunt ima 

 basi aut sursum longius polysiphonii, sensim in ramellos mono- 

 siphonios, simplices aut iterum iterumque dichotomos, soluti, 

 distantiis subregularibus (ad geniculum quodque, "quodque se- 

 cundum, quodque quartum etc. in speciebus articulatis) proveni- 

 entes, ubi distiche pinnulas, ubi quoquoversum dispositi ramu- 

 los, structura a ramis diversos, constituentes; in sectionibus 

 Rhodonema Lophothalia et Lophocladia sunt ramuli a ramis 



