248 42. DIDYMOCIIL^NA. 43. ASPIDIUM. 



irregularly linear or oblong patches. Schaffneria, Fee. Asplenium, Hk. Kew 

 Gard. Misc. 9. t. 9. 



Hab. Mexico and Guatemala. 



Camptosorus, Link. Veins anastomosing near the midrib but free outwards. 

 Son usually in opposite pairs, but more or less divaricating. Sp. 8-9. 



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

 chesnut-brown ; 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. ; barren fr. ovate-acuminate, 1 in. 1., J- 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. ASPIDIE.E. 



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

 the sorus, fixed either by the centre or a sinus. GEN. 42-47. 



GEN. 42. DIDYMOCHL^ENA, Desv. 



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

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

 the edge. TAB. 4. f. 42. 



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

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

 sinuated ; texture subcoriaceous ; venation subflabellate ; sori 2-6 to a pinnule. 

 Hk. Sp. 4. p t 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. D.polt/carpa, Baker ; caud. erect ; st. tufted, short ; fr. 2-3 ft. 1., 12-18 in. 

 br., simply pinnate ; pinnae 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. 61. Mesochleena, R. Br. MSS. Sphserostephanos, 



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

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

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



GEN. 43. ASPIDIUM, iSw. (in part) R. Br. (See page 492.) 



Sori subglobose, dorsal or terminal on the veinlete. 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. 



