248 • 42. DIDYMOCIIL^NA. 43. ASriDIUlI. 



irregularly linear or oblong patches. — Scliaffneria, Fee. Asplenium, Hh. Kew 

 Gard. Misc. 9. ^ 9. . 



Hab. Mexico and Guatemala. 



§§§§ Camptosorus, Liiik. Veins anastomosing near the midrib hut free outwards. 

 tSori usuallj/ in opposite pairs, hut more or less divaricating. Sp. 8-9. 



8. S. (Campt.) rhizophyllum, Hk. ; st. 1-4 in. 1., naked, compressed, below 

 chesnut-brovvn ; fr. 4-9 in. 1., lanceolate, from an auricled cordate base, the point 

 tapering out and often rooting ; texture coriaceous ; sori short, irregular, linear- 

 oblong. — Hk. Sp. 4. p. 4. 



Hab. British America to the Southern United States. 



9. S. (Campt.) sibiricum, Hk. ; Jarre?? /r. ovate-acuminate, 1 in. 1., ^-f in. 

 br. ; fertile fr. 6 in. or more 1., j in. br., the apex elongated and rooting, the 

 base not auricled and narrowed gradually ; st. 2-3 in. 1., naked, green upwards, 

 ebeneous below ; texture subcoriaceous ; sori linear or oblong. — Hk. Sp. 4. p. 4. 

 2nd Cent. t. 35. 



Hab. W. Siberia, Kamschatka, Tsus-Sima, Japan. 



Tribe 10. Aspidieje. 



Sori dorsal, suhglobose, rarely elliptical. Involucre superior, similar in shape to 

 the sorus, fixed either hj/ the centre or a sinus. Gen. 42-47. 



Gen. 42, Didymochl^na, Desv. 



Sori elliptical, terminal on a veinlet, but distinctly intramarginal. Tnvol. 

 elliptical, emarginate at the base, attached to the linear receptacle, free all round 

 the edge. Tab. 4. f. 42. 



1. D. lumdata, Desv. ; caud. erect, subarborescent ; fr. densely tufted, 4-6 ft. 

 1., bipinnate ; pinnl. |-1 in. br., dimidiate, subquadrangular, entire or slightly 

 sinnated ; texture subcoriaceous ; venation subflabeliate ; sori 2-G to a pinnule. 

 — Hk. Sp. 4. p, 5. G. F. t. 17. Aspid. truncatulum, Sw., Willd. 



Hab. Tropical America, from Cuba and Guatemala to Peru and Brazil ; Fiji, Malayan 

 Peninsula and Isles, Madagascar, Johanna Island, Natal, Fernando Po. — The pinnules 

 in shape and texture correspond with those of the dimidiate AdiantecE and Lindsayce. 



2. p. polycarpa. Baker ; caud. erect ; st. tufted, short ; fr. 2-3 ft. 1., 12-18 in. 

 br., simply pinnate ; pinnm close, very numerous, spreading, dwindling down 

 below to mere auricles, the largest 6-9 in. 1., ^ in. br., cut down halfway or more 

 to the rachis into close linear-oblong lobes"; rachis and lower surface villose ; 

 veins very close, pinnated, 12 or more on each side in a lobe ; sori small, 

 close, ultimately confluent. — Aspid. BL, Mett. Nephrodium javanicum, Hk. 

 Sp. 4. p. 67. Fil. Ex. t. (j\. Mesochlccna, R, Br. MSS. Sphserostephanos, 

 J. Sm, 



Hab. Malayan Peninsula and Islands. — Habit and venation of Eunephrodium, but the 

 involucre in structure resembles the preceding. M. asplcnioides, J. Smith, is a villose 

 variety, with narrower pinnaj than usual, with short oblong-deltoid lobes. 



Gen. 43. Aspidium, Sw. {in part) B. Br. (See page 492.) 



Sori subglobose, dorsal or terminal on the veinlets. Invol. orbicular, fixed by 

 the centre. A cosmopolitan genus, the species of which vary much in size, texture, 

 cutting, and venation. Tab. 5. f. 43. 



