1658 Eu-Floi-ideae, Halarachnionege, Furcellaria. 



FURCELLARIA Laiaour. [1813] Essai p. 25 ') (Etyiii. furca, ob frondis 

 rainilicationis formam) J. Ag. Sp. II, p. 194, Epicr. p. 241, Anal. 

 Algol. Contin. IV (1897) p. 16, Kuetz. Sp. p. 748 excl. sp., Engl. & 

 Pranll Natiiri. Pflanzenfam. (1897) p. 525, Fastigiuria Stacldi. [ 1809J 

 in Mem. Soc. Mosc. II, p. 59, 90, Nereis Rrit. (1816), Le Jolis List. 

 Alg. Ciierb. p. 124, Hauck Meeresalgen p. 123. — Frons teretiuscula. 

 repetite dichotoma fastigiata, cartilaginea, tribus stratis contexta, 

 strato medullari filis elongatis dense intertcxtis longitudinalibus, 

 ilitermedio cellulis brevioribus amplis laxiusculis, corticali cellulis 

 minoribus in fila verticalia conjunctis constante. Fructus utriusquc 

 generis in apicibus siIi(iu[eformi-incrassatis immersi. Cystocarpia 

 circa axin centralem sterilem circumcirca evoluta filisque strati 

 medullaris plurimis invicem transversaliter sejuncta, nucleis plu- 

 ribus, longitudinaliter intra cryptas elongatas seriatis, demum cou- 

 fluentibus, constituta; nucleoli subradiati secedentibus filis periphe- 

 ricis demum liberati, carposporas majusculas, rotundato-angulatas, 

 sine ordine conspicuo conglobatas, perisporio hyalino cinctas fo- 

 ventes. Tetrasporangia inter cellulas strati exterioris magis evo 

 lutas immersa elongato-piriformia zonatim divisa. Antheridia (sec. 

 Buffiiam) in apicibus frondis corpora ovoidea, flavescentia, siliqu;c- 

 formia efficientia. 



Obs. De genere sequontia docet J. Agardh. Frondes caespitosje, a 

 radice repente erectiusculse aut subhemispherice radiantes, teretes, 

 crebris dichotomiis decomposita?, eximie fastigiata^, apice in siliquas 

 elongatas utrinque acuminatas, simplices aut ipsas furcatas demum 

 intumescentes. Siliquse fructifene demum fructibus emissis delaben- 

 tes, cicatricem truncatam linquentes, a qua frondes novellae geminie 

 aut plures pullulant. Triplici strato frons contexta est. Stratum 

 medullare cellulis elongatis cylindraceis granulosis dense intertextis 

 longitudinaliter excurrentibus constat. Ab his superficiem versus 

 radii arcuatim exeunt, cellulis brevioribus rotundato-ellipsoideis 

 densius approximatis granulosis constituti. Has undique circumdat 

 stratum periphericum, cellulis minoribus in fila subverticalia mo- 

 niliformia conjunctis, endochromate. minutius granuloso farctis con- 

 textum. Fructus utriusque generis in apicibus siliquosis diverso- 

 rum individuorum deraersi. Cystocarpia in cryptis strati interme- 



') De nomine pro hoc genere u.surpando, conferendae sunt diligentes disqui- 

 sitiones a cl. A. Le Jolis (Remarques sur la nomenclature algologique p. 141- 

 147, Paris 1896) exhibitse. 



