1042 Eu-Floridese, Herposiphoniese, Placophora. 



involuti, dein plus minus valde revoluti, subteretes, apice versus 

 dorsum incurvi, e margine dorsuali distiche alterne divisi. Axis 

 articulatus polysiphonius (cellulis pericentrali bus 4 instructus) nu- 

 dus, inferne lacunoso-corticatus. Crescentia monopodica, cellula 

 apicali producta primum transverse dein oblique in cellulas novas 

 secedente. Fructus in ramulis ultimis plus minus mutatis siti. Cy- 

 stocarpia globoso-ovata, pericarpio tenui minute celluloso donata; 

 carposporae minutae, acrogense, ovoideo-oblongae. Antheridia e tran- 

 sformatione ramulorum ultimorum orta, ol)longo-compressa, pedi- 

 cello brevi monosiphonio fulta. Stichidia linearia, subcomplanata, 

 derso leniter arcuata, tetrasporangia secus duas lineas marginales 

 alternantes disposita foventia. 



1. Microcolax botryocarpa Schmitz in Engl. & Prantl Natiirl. Pflan- no7 

 zenfam. (1897) pag. 458, fig. 257 E-O, Falkenb. Rhodomelaceen 

 (1901) p. 357 (ampla descriptio), tab. 20, f. 15-18, Polysiphonia 

 botryocarpa Hook. et Harv. Crypt. Ant. pag. (19, t. LXX (quoad 

 fructus). — Characteres generis. 



Hab. in frondibus Streblocladia3 neglectae Schmitz ad 

 « Akaroa » et insulas « Auckland » (D' Urville, Hooker). 



PLACOPHORA J. Ag. [1863] Sp. II, 3, p. 1137 (Etym. plax, placos 

 tabula et phoreo fero), Till Algern. Syst. VII, pag. 111, Engl. & 

 Prantl Natiirl. Pflanzenfam. (1897) p. 462, Falkenb. Congenit. 

 Wachst. Pollexfen. (1881), Rhodomelaceen (1901) pag. 326 (ubi 

 amplissime de structura frondis contra opinionem Goebelii tracta- 

 tur), Rhodopeltis Asken. [1872] Botan. Morph. Studien 3, pag 42 

 (non Rhodopeltis Harv. 1863), Micramansia Kuetz. [1865] Tab. 

 Phyc. XV, pag. 2, Amansia? sp. — Frons plana, tenuis, fiabel- 

 latim expansa lobisque conformibus peripherica crescentia do- 

 natis subdivisa, inferiori pagina matrici rhizinarum ope adflxa, 

 distromatica, cellulis unius alteriusque strati in zonas concentri- 

 cas conjunctis, rectangule oblongis, aliis angustioribus venas fla- 

 bellatim excurrentes mentientibus. Prolificationes graciles, tenues, 

 dorsiventrales, processus conformes binatim alternantes, 5-sipho- 

 nios gerentes. Fructus in processubus filiformibus articulatis, in 

 sinu loborum submarginalibus fasciculatis evoluti. Cystocarpia o- 

 vato-globosa, intra pericarpium cellulosum, carpostomio apertuin, 

 carposporas piriformes in articulo terminali filorum a placenta 

 radiantium foventia. Stichidia filiformia, incurva, tetrasporangia 



