WOODSIA. 



[ 691 ] 



WRANGELIA. 



of the stems of the Flowerless plants. The 

 researches of Trecul have furnished the 

 completing hand to the evidence against the 

 doctrines of Gaudichaud and others, and the 

 earlier views of the nature of cambium enter- 

 tained bv Mirbel. 



BiBL. LinAley, Introd. to Botany, 4t\ied. 

 'Y. p. 198; Link, Elem. phys. hot. i. p. 257, 

 Ann. des Sc. nat. 2 ser. v. p. 29 ; DeCandolle, 

 OrganograpTiie, i. p. 161 ; Meyen, Pflanzen- 

 phys. i. p. 331 ; Schleiden, Grundz. 3rd ed. 

 i. p. 253 {PrinrAples, p. 56), Wiegmann' s 

 Archiv. 1830. i. p. 220, Beitr. z. Bot. p. 29, 

 Mem. Acad. St. Petersb. 6 ser. iv. (1842); 

 Treviranus, Bot. Zeit. v. p. 3/7 (1842), Ann. 

 Not. Hist. 2 ser. i. p. 124; Mohl, Verm. 

 Schrift. passim ; Miquel, Linncea, xvii. p. 

 465; xviii. p. 125, Ann. des Sc. nat. 2 ser. 

 xix. p. 164; 3 ser. v. p. 11; Goeppert, Z)e 

 Struct. Conifer. Yratislav, 1841, Linncea, 

 xvi. p. 747; xvii. p. 135, Ann. des Sc. nat. 

 2 ser. xviii. pp. 1 & 317; Brongniart, Fe^e^. 

 Fossiles, Paris, 1828, et seq., Ann. des Sc. 

 nat. 1 ser. xvi. p. 589; Jussieu, Aim. des Sc. 

 nat. 2 ser. xv. p. 234 : Decaisne, ibid. xii. 

 p. 92, 3 ser. v. p. 247 ; Hooker, J. D. Flor. 

 Antarc, Ann. des Sc. nat. 3 ser. v. 193 ; 

 Gaudichaud, Recherches Anatom., Sfc. Paris, 

 and Ann. des Sc. nat. 3 ser. passim; Mene- 

 ghini, Bicherche sulla Strutt. Monoc. ; 

 Schacht, Pjianzenzelle, p. 193, Das Baum. 

 p. 94 ; Criiger, Bot. Zeit. viii. p. 99 ; x. p. 

 465; Trecul, Ann. des Sc. nat. 3 ser. xviii., 

 xix., XX.; 4 ser. i., ii. iii. ; Milde, Beitr. z. 

 Bot. Heidelb. 1850. 



Fig. 814. 



Woodsia hyperborea. 



A sorus and indusium with a hair-like fringe. 



Magnified 50 diameters. 



WOODSIA, R. Brown.— A genus of Cya- 

 thseous Ferns, represented by two rare indi- 

 genous species. The indusia are of an open 

 cup-shape, and bear long hairs on the mar- 

 gin (fig. 814). ioiiiOf b-:. 



WOODWARDIA, Smith.— A genus of 

 Asplenieae (Polvpodaeous Ferns). Exotic. 



(fig. 815). 



Fig. 815. 



,::^i 



Woodwardia. 

 A fertile pinnule. Magnified 5 diameters. 



WOOL, of Animals. See Hair (p. 310). 

 The fibres of wool are coloured by the test- 

 liquids of Millon and Schultze. 



WRANGELIA, Ag.— A genus of Cera- 

 miacese (Florideous Algfe), differing from 

 GriffitJisia chiefly in the scattered tetraspores. 

 W. multifida, the only British species, has 

 rose-red feathery fronds, an inch high, con- 

 sisting of a main filament, about as thick as 

 a bristle, composed of a single row^ of cells, 

 bearing long, pinuately-arranged, patent 

 branches, mostly branching in the same way 

 again. At the articulations occur two oppo- 

 site (or more rarely a whorl of) pimiato- 

 multifid or sub-dichotomous ramelli 1-12 to 

 to 1-6" long. The fructification consists of 

 — \.favell(B, borne on stalks at the joints, 

 and surrounded hy a whorl of ramelli ; and 

 2. elliptical tetraspores, opposite, secund 

 or tufted, on the lower part of the ramelli. 

 In some foreign species antheridia have 

 been observed in similar situations to the 

 tetraspores. 



BiBL. Harvev, Brit. Mar. Alg. p. 169. 

 pi. 24 D., Phyc. Brit. pi. 27 ; Derbes and 

 Sober, Ann. des Sc. nat. 3 ser. xiv. p. 273 

 pi. 35 ; Thuret, ibid. 4 ser. iii. p. 38. 



2y2 



