DA V ALU A. 193 



Fronds ^ to 2 feet liigli. Fiuclificalions copious, one on almost each di- 

 lated apex of a segment, in a sinus of two unequal lobes, of which one is 

 gibbous. The involucre is oblique, and opens towards the axis of the 

 pinnules. 



101. D. Lindeni, Hook. ; tufted, root fibrous but having a 

 short tliick rootstock, fronds (a s]ian long) ovato-lanccolatc 

 bijiinnatifid pale green, ])riniary divisions lanceolate in cir- 

 cumscription, ultimate ones remote and rachis linear, the 

 forms dilated upwards blunt and bearing the sorus oblicjuely 

 in the inner margin, involucres cujj-shaped compressed trun- 

 cated generally with a short blunt falcate tooth on the outer 

 margin formed by a ])rolongation of the segment, stipes long- 

 er than the frond compressed narrow-linear green, and as well 

 as the frond bearing scattered brown at length deciduous sub- 

 ulate scales. (Tab. LVI. B.). — (3. smaller segments narrower, 

 apices of the segments more acute. 



Hab. Caracas, Linden, n. 70; Ilarhvrg, m. 1507; Finick, n. 648.-3. 

 Organ mountains, on the stem of an old tree, Gardner, n. 200. — Very dis- 

 tinct from the preceding, and more allied to the following, from which it 

 may be known by its smallersize, of a darker green, w ith more slender (yet 

 decidedly compressed) stipes, shorter fronds, broader, with more distant 

 segments and oblique sori, in which latter respects it ajiproaches to D. 

 (jibbcrosa. Our var. /3. from Brazil is more slender, with narrower seg- 

 ments, the ultimate ones more acute : but I see no other differences. 



10*2. D. Schimperi, Hook. ; tufted (a foot high), root 

 fibrous, fronds pale whitish green lanceolate with scattered 

 brown deciduous scales, tripinnatifid, segments linear distant 

 dilated at the apex and obtuse simple or forked on the lower 

 ones sometimes pinnatifid, sori terminal solitary slightly ob- 

 lique, involucres cup-shaped truncate rarely (the inferior ones) 

 with a tooth on the outside, stipes shorter than the frond li- 

 near flat as broad as the segments with small scattered dis- 

 tant scales. (Tab. L. A.). — D. concinna, Schimper, It. Abyss. 

 Sect. 2(1(1, n. 1184, " speclmina ma.viina,'' [not Schrad.) 



Hab. Trunks of trees near Adesula, Abyssinia, Schimper. — This is a 

 very different plant from the following, D. concinna. Its roots are tufted 

 and fibrous, but in the centre of the fibres is a short cormus or root-stock, 

 with some dark brown, glossy scales. Stipites crowded, several from the 

 same root, linear, pale, almost white, flattened, with a few scattered dark 

 brown scales, which are probably deciduous. Fronds a span and more high, 

 lanceolate, bipinnatifid : primary segments or divisions lanceolate in cir- 

 cumscription, ultimate ones distant, and rachis of the same width as the 

 stipes. Involucres terminal, solitary, a little oblique on each segment, 

 slightly winged on eacli side, truncated. — Allied to D. (jibbcrosa, but truly 

 distinct, everywhere pinnatifid. Color very pale. 



103, ? D. concinna, Schrad. ; " frond lanceolato-oblong 



o 



