Eu-Florideee, Polysiphoniese, Polysiphonia. 895 



erectiuscula, Lnferne capillaria aut fere setacea, subdichotome de- 

 composita et sensim attonuata, apice parum aut multo tenuiora, 

 plus minus ramis compositis ramulisque simpliciusculis promiscue 

 provenientibus virgata. Rami, ut excrescunt, filis primariis consi- 

 miles, distantes, articulis 6 aut pluribus inter proximos saepe ln- 

 terjacentibus. Ramuli plus minus elongati, a basi attenuati, plu- 

 riini longiusculi, nunc sparsim breviores fere subulati at molles. 

 Articuli plerumque longitudine parum diversi diametro sesquilon- 

 giores, paulo breviores in ramulis, nunc medii magis elongati, 2- 

 plo aut fere triplo diametro longiores, usque ad basin frondis di- 

 stinguendi et geniculis inflatis prcecipue in partibus inferioribus 

 facilius distincti; scctione transversali conspiciuntur siphones 4 

 circa centralem, cortice nullo. Tetrasporangia admodum sparsa 

 proveniunt, singula aut pauca (2-3) in ramulo insequaliter verru- 

 coso unilateraliter prominentia. Cystocarpia minora, ovata, ad ra- 

 mos superiores sessilia, erectiuscula et ramo fere adpressa. Color 

 saturate rufescenti-brunneus. Specimina exsiccatione chartse adhse- 

 rent. Sub nomine Polysiphonice havanensis obveniunt in herbariis 

 species diversae. In herbario Argentoratense adest sub lioc noinine 

 planta ad Pachychcetam pertinens; Harvey in Acc. of Mar. Bot. 

 of West Austral. p. 530 algani memoravit quoe a specie Monta- 

 gneana, etsi in plurimis characteribus conveniens, tamen ob ramos 

 basi attenuatos ramulosque tetrasporangiferos minus torulosos aut 

 insequaliter verrucosos diversa, teste J. Agardh, videtur. 

 42. Polysiphonia pulvinata .T. Ag. Alg. Med. p. 124, Sp. II, 3, p 057. 1505 

 Kuetz. Tab. Phyc. XIII, t. 36, f. a-a (cystoc. et anther.), Ardiss. 

 Phyc. Medit. I, p. 375, Hauck Meeresalgen p. 219 (non Areschoug), 

 Conferva pulvinata Roth Catal. bot. I, p. 187, t. 3, f. 4 (nec f. 5), 

 Cat. II, p. 211 (fide C. Agardh), Polysiphonia arenaria Kuetz. Phyc. 

 germ. p. 313, Tab. Phyc. XIII, t. 35, f. d-g, Rutchinsia baclia Ag. 

 Sp. p. 74 (partim), Hutchinsia pulvinata Ag. Sp. II, p. 10!) par- 

 tim, Polysiphonia capillata De Not. Prosp. Fl. Lig. pag. 67. — 

 Caespite erectiusculo densissimo, filis primariis decumbentibus ra- 

 dicantibus, secundariis erectiusculis a basi articulatis parcius di- 

 chotomis vage ramulosis, ramulis sparsis versus apices numero- 

 sioribus subsecundatis, articulis 4-siphoniis, mediis diametro ses- 

 qui-triplo longioribus, ramorum sequalibus; tetrasporangiis iu api- 

 cibus filorum torulosis seriatis; cystocarpiis urceolatis, pedicellatis. 

 Hab. in scrobiculis et ad rupes parum demersas tranquilliorum 

 sinuum oceani Atlantici ;i sinu Codano usque ad Gades Hispaniae 



