Vaucheria.] ALG.T: INARTICULATE. 319 



53. Vaucheria. De Cand. Vaucheria. 



Fronds aggregated, tubular, continuous, capillary, coloured 

 by an internal green pulverulent mass. Fructification ; dark- 

 green homogeneous vesicles (coniocystae, Ag.) attached to the 

 frond. Grev. Ale/. Brit. p. 189. t. 19 — Named in compliment 

 to the Rev. T. P. Voucher, a minister of Geneva and very 

 acute Botanist, who published a Monograph of this genus in 

 his Histoire des Confervcs d Eau douce, under the name of Ec- 

 tosperma. 



* Vesicles solitary. 



1. V. dichotoma, Ag. (large, dichotomous Vaucheria); fila- 

 ments dichotomous fastigiate the vesicles solitary globose sessile. 

 Grev. — Ag. Sp. Alg. v. 1. p. 460. Lyngb. Hydroph. Dan. p. 

 75. t. 19. Grev. Alg. Brit. p. 190. — Conferva dichotoma, Linn. — 



Dillw. Conf. t. 15. E. Bot. t. 932 [3. submarina ; frond more 



slender, the vesicles ovate or elliptical. Grev. — Lyngb. Hydroph. 

 Dan. p. 76. t. 20. 



Pools and ditches, generally of fresh water. 0. In the sea, Wey- 

 mouth, Rev. M. J. Berkeley. ©. Spring and Summer. — The largest of 

 this genus, often a foot or more long, sometimes filling up the ditches 

 with its numerous filaments. 



2. V. velutina, Ag. (velvet Vaucheria) ; filaments creeping, 

 branches erect fastigiate woven into a velvety stratum, capsules 

 solitary lateral. Carm. — Ag. Syst. Alg. Addend. p. 312. Carm. 

 MSS. cum Lc. 



On the muddy shore, flooded by the tide, Appin ; Capt. Carmichacl. 

 Miltown Malbay, Mr. Harvey. ©. Spring, Summer. — " Filaments ex- 

 ceedingly tough, interwoven into a den^e velvety-green stratum, pellu- 

 cid below and creeping over the nnul; branches near the extremity, 

 erect, fastigiate and more or less crooked. Capsules solitary, globular, 

 on short lateral peduncles." Carm. MSS. 



3. V. marina. Lyngb. (marine Vaucheria); filaments loosely 

 tufted or distinct, branches few very long- obtuse, \ esicles solitary 

 obovate pedicellate lateral, ('arm. — Lyngb, Hydroph. Dan. p. 

 79./. 22. A ;/ . Sj>. Alg. r. 1. p. 7:i. /. 163. Carm. MSS. cum Tc. 



On Furceiiaria lumbricatu, Appin, extremely rarej CapL Cer- 

 michael. ©. Summer. — "This occurs in small, loosely floating tufts, 

 an inch long. Filaments \cr\ Blender and flaccid, filled tor the most 

 part with a green granuliferous fluid, but here and there empty and 

 hyaline, the lowerbranches mostly fasciculate, upper ones single,erect,but 



with \er\ wide axill:e. I'r.sidrs lew, Scattered, lateral, OOOVate, shortly 



pedicellcd, <>f a dai k-biownish green, BS arc, in many instances, the 



branches. On drying* it assumes a deep shining green colour. Prom 

 its exceedingly tough and flaccid texture, am! its gloesj dark- 

 hue, not to mention it -^ habitat ( o different from that of all the other 



ies)t there can be little doubt, I believe, that tin-, plant belongs 

 more properly to the Genus Brycpris than to I < 



— Wire T. MOrtfM, in. Iced, pinnated, a. Mr. llai\<\ ohscnes, it would 



be a Bryopsit i there ii no other cbaractei to distinguish the genera. 



