58. DllYMOGLOSSUM. 397 



to an acute point and below to the base or a short stem ; texture subcoriaceous, 

 flaccid ; midrib distinct ; veins immersed, forming 2-3 rows of vertical hexagonal 

 areolce, 3-4 times as long as broad between the midrib and edge ; sari sunk in a 

 groove a short distance from the edge. Hk. Sp. 5. p. 187. Pteropsis, Desv. 



Hab. Cuba to N. Brazil and the Galapagos. 



3. T. lanceolata^ R. Br. ; rhizome creeping, very stout ; st. 1-2 in. 1., firm, 

 erect; fr. 6-12 in. 1., 1-2 in. br., narrowed gradually from the centre to both 

 ends, the edge entire but often crisped ; texture firm, coriaceous, naked ; midrib 

 distinct ; areolce immersed, copious, small, with copious free veinlets ; sori in 

 continuous or interrupted lines near the edge of the contracted upper third or 

 quarter of the frond. Hk. Sp. 5. p. 186. Paltonium, Presl. Neurodium, Fee. 



Hab. West Indies and Guatemala. TheJavan T.marginalis, Moore (T. Blumei, Hk.), 

 is said to be like this, but smaller in size, and without a midrib. 



** Fronds compound. Sp. 4-5. 



4. T. furcata. Willd. ; rhizome subrepent, densely tomentose ; fr. 6-18 in. L, 

 once or twice dichotomously forked or subpinnatifid, the lobes linear, erecto- 

 patent, much acuminated, entire, 4-8 in. L, j-jjr in. br. ; texture coriaceous ; 

 under surface thinly clothed with minute scales ; veins anastomosing without free 

 veinlets ; sori submarginal, continuous or interrupted. Hk. Sp. 5. p. 188. 

 Cuspiaria, Fee. 



Hab. West Indies to Ecuador and the Amazon Valley. T. Desvauxii, Klotzsch (C. semi- 

 pinnatifida, F^e), is a small variety with narrow lobes, unbranched primary veins, and 

 only a single row of areolse. 



5. T. blechnoides, Swz. ; rhizome creeping ; st. 8-12 in. L, firm, naked, glossy ; 

 fr. 1-2 ft. 1., 8-12 in. br., simply pinnate ; pinnce of barren frond 2-3 on each 

 side, 6-9 in. 1., 1-2 in. br., oblong-lanceolate, the point acuminate, the edge 

 thickened and wavy, the base cuneate, the lower ones stalked ; fertile pinnae 

 narrower and more numerous ; texture coriaceous ; areolce copious, oblique, 

 without free veinlets ; sori in a continuous line about midway between the edge 

 and midrib. /3, T. interrupta, Wall. ; pinnce smaller ; sori interrupted and 

 much nearer the edge. Hk. & Gr. t. 62. Hk. Sp. 5. p. 188. 



Hab. Malaccas and Philippines. 



GEN. 58. DRY.MOGLOSSUM, Presl. 



Sori scarcely differing from those of Tsenitis, but the fronds dimorphous. 

 TA.B. VI. fig. 58.* 



1. D. carnosum, Hk. ; rhizome filiform, wide-creeping; fr. dimorphous, the 

 barren ones suborbicular or elliptical, 1-2 in. 1., f-1 in. br., the fertile ones 

 linear-spathulate, 2-3 in. L, ^ in. br., both narrowed to the base or a short stem ; 

 texture coriaceous ; areolce small, with copious free veinlets ; sori in a line 

 midway between the edge and midrib, when young covered with stalked peltate 

 scales. /3, D. subcordatum, Fee ; fr. smaller, the barren ones roundish, sub- 

 sessile ; texture thinner ; caps, mixed with hairs, not scales. Hk. Sp. 5. p. 189. 



Hab. Japan to Formosa, Hong-Kong, and the Himalayas. 



* It would be better to make two genera only out of this and the two preceding, 

 placing in one those species in which the line in front is submarginal, and in the other 

 those in which it is remote from the edge. 



