Eu-Floride?e, Batrachospermea?, Ratrachospermum. 49 



Conspectus generum. 



Batrachospenyvuin Roth. — [Species aqu;o dulcis incolii!]. 

 G^dsouia Fiarv. — [Species marina]. 



BATRACHOSPERMUM Roth [1797] Bemerk. ub. das Stud. der Kryptog. 

 W;issergew:ichso p. 36, Tentamen Fl. Germ. III, (1800), p. 480, 

 Bory Mem. sur le genre Batrachosperma (1808) (Etym. batrachos 

 rana et sperma semen), Kuetz. Sp. p. 535, Rabenh. Fl. Eur. Al- 

 gar, III, pag. 404, Sohns-Laub. in Botan. Zeitung 1867, n. 21, 

 Born. et Thur. in Ann. Scienc. Nat., Bot., 5 ser., 1867, Tom. VII, 

 Hansg. Prodr. I, p. 22, Arcangeli Sopra alc. sp. di Batrach. in N. 

 Giorn. bot. ital. XIV, 1882, p. 155, Sirodot in Bull. Soc. Bot. 

 Fr. T. XXII (1875) et Les Batrachospermes, Paris 1884 (opus 

 eximium!), Compt. rend. Ac. Paris tom. 79 et 84, Brand Ueber 

 Batrachosp. in Botan. Centralbl. 1895, n. 8, p. 280 (ubi etiam sche- 

 niatice de formis cycli biologici Batrachospermi pertractatur), 

 Schmitz et Hauptfl. in Engl. & Prantl Natiirl. Pflanzenfam. 141 

 (1896), p. 329, B. M. Davis Fertilization of Batrach. in Annals of 

 Botany X, n. XXXVII, 189G, p. 49-76, tab. VI-VII ! (ubi de stru- 

 ctura carpogoniorum, spermatiorum, de fecundatione etc. ample 

 disseritur), Gelatinaria Rouss. [1806] FI. du Calvados (non Gelina- 

 ria Sond.), Charospermum Link, Torularia Bonnem. [1828] in 

 Mem, du Museum XVI, p. 97, Batrachospermella Gaill. in Orb. 

 Dict. II, p. 502, Batrachosperma (Bory) Wittst. Etym. Handw. 

 p. 96, Draparnaldina, Monilina, Thorinia et Lemanina Bory 

 [1822] Dict. class. d'hist. nat. II, p. 226. — Thallus gelatinoso-Iu- 

 bricus, filamentosus, ssepius moniliformis, caespitosus; axis ramique 

 e cellulis hyalinis cylindraceis superpositis constantes, verticillos 

 ramulorum (serierum cellularum) simplicium aut furcatorum certis 

 distantiis gerentes. Propagatio (asexualis) monosporis intra mo- 

 nosporangia efformatis ( Audouinellce sp.). Generatio carpogoniis et 

 antheridiis, ssepius monoicis. Carposporse germinando protothal- 

 lum chantransiseformem gignentes, Spermatia nucleo parietali in- 

 structa, vacuolo centrali amplo donata, demum hyalina. 



Obs. Ad faciliorem reddendam specierum distinctionem, con- 

 spectum analyticum, pro unaquaque sectione Batrachospermi a 

 generis monographo exhil)itum, hic resumere operae pretium esse 

 censui. Descriptiones autem perquam maxime diligentes dedit in 

 suo opere iconibus pulcherrimis ornato (Les Batrachospermes 1884) 

 clarus Sirodot, quas hic brevissime redigere necesse est. 



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