Ser. OON-GYLOSrERi\rE.E. { 41 ) Fam. CRYPTOXEMIACEJ'.. 



Plate LXXXII. 

 GYMNOGONGRUS GRIFFITH SI.E.—J/^r^. 



Gen. Char. — Frond between cartilaginous and horny, cylindrical, compressed or plane, 

 composed of two strata of cells : those of the inner stratum roundish, angular, 

 smaller outwards ; those of the outer minute, forming vertical moniliform 

 filaments, very densely packed. Fructification of two kinds, on distinct plants : 



1. Favellidia, immersed in the substance of the frond, and more or less prominent ; 



2. Neiuathecia, formed of radiating filaments, whose articulations are at length 

 resolved into tetraspores. Name from yvixvhs, "naked," and y6yypos, a word 

 applied by Theophrastus to a disease resembling a swelling to which trees are 

 subject ; the allusion is to the appearance of the fruit in these Algoe. 



Gymxogoxgrus Griffithsice. — Frond cartilaginous, cylindrical, simple, 

 or more or less dichotomously branched from near the base ; ultimate 

 ramuli short and fastigiate ; warts lateral on the upper branchlets, at 

 length smTOunding the stem. 



Gtmnogongrtjs Griffithsim.—Mart . Fl. Braz. vol. i. p. 27 ; Moi\t. Fl. AJgier. 

 p. 119 ; Harv. P. B. plate 108 ; Earv. Man. p. 145 ; Harv. Syn. 

 p. 118 ; Atlas, plate 50, fig. 228 ; /. G. Agardh, Sp, Gen. Alg. 

 vol. ii. p. 316. 



Ttlocarpus Griffithsice. — Kiitz. Phyc. Gen. p. 411, 



Tylocarpus tentaculatus (?). — Kiitz. 1. c. t. 70, f. 2. 



Chondrus GriffitlisicB. — /. Ag. Alg. Medit. p. 95 ; Endl. 3rd Suppl. p. 39. 



GiGARTiNA Griffithsice. — Lamour. Ess. p. 49 ; Lyngh. Hyd. Dan. p. 43, t. 11 ; Grev. 

 Alg. Brit. p. 149; Hooh. Br. Fl. vol. ii. p. 301 ; Harv. in Maclc. 

 Fl. Eih. part 3, p. 201; Harv. Man. Isted. p. 76 ; Wyatt, Alg. Danm. 

 No. 28 ; Mont. Fl. Canar. p. 160. 



PoLTiDES Griffithsice. — Gaill. Diet. So. Nat. vol. liii. p. 365. 



SpH.a;ROCOCcirs Griffithsice. — Ag. Sp. Alg. vol. i. p. 316 ; Ag. Syst, p. 235 ; Spreng. 

 iSyst. Veg. vol. iv. p. 339. 



FuCTTS Griffithsice.— Turn. Hist. t. 37 ; E. Bot. t. 1926, 



Had. — On rocks and stones near low- water mark. Perennial. Autumn and winter. 

 Pather rare. Sidmouth and Torbay (Mrs. Griffiths) ; Exmouth {3frs. Gulson) ; Bantry 

 Bay {Miss Hutchins) ; Balbriggan (Dr. Seott) \ Mounts Bay {Mr. Ralfs) ; Strousa 

 {Lieut. Thomas and Dr. McBain) ; IMalahide {Mr. M'Calla). 



Geogr. Dist. — Coasts of Europe; Canary Islands; Boston, North America {Mr. 

 Emerson). 



Description. — Root, a flattened conical disc. Fronds filiform, cylin- 

 drical throughout, and very much branched from a little below the 



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