ADIANTUM. 35 



think Mr. Gardner's n. 5299 may be considered just intermediate between 

 A. trapeziforme and A. snbcordatum. 



69. A. Peruviannm, Kl. ; fronds ample decompound, pin- 

 nules very large chartaceous sliglitly glaucous beneath all 

 petiolate obliquely trapezoid obtuse (rarely acuminate) the 

 angles rounded superior margin duplicato-crenate lobules 

 soriferous, sori approximate reniform, stipes rachis and 

 pedicels ebeneous intensely black. (Tab. LXXXI. C.) Kl. 

 in Li)i)i(ca, xviii. p. 555. A. populifolium, J. Sin. mst. 



Hab. Peru (Vitoc, Herb. Ruiz and Pavon, KlotzscK) ; Malhews, n. 1854. 

 — This is, in every respect, a much stouter and more rigid plant than A. 

 trapeziforme or A. suhcordatum, with llie pinnae coriaceous, 2^ and 3 inches 

 loup:, and almost exactly trapeziform, their two lower sides, however, more 

 or less unequal, the upper si<les or margins rather crenate than lobed, all 

 the angles (except the point of insertion with the petiole) obtuse ; though in 

 some pinnules the apex is acuminated, and hence showing a great affi- 

 nity with the two preceding. This species or form we only know as Peru- 

 vian, from Ruiz and Pavon and Mathews' collections. 



70. A. Mat hews ianum, Elook. ; glabrous, frond large su- 

 pradecompound, pinnae lanceolate, pinnules approximate 

 obliquely rhombco-ovate rather long petiolate sub-acute 

 rigid chartaceo-membvanaceous glossy striated superior base 

 truncate inferior base (or lower half of lower margin) straight 

 and horizontal, the rest moderately lobed and serrated, lobes 

 soriferous, involucres rather large hard broad semilunate, 

 stipes and rachis everywhere ebeneous glossy glabrous. (Tab. 

 LXXXIV. A.) 



Hab. Chacapoyas, Peru, Malhetvs, n. 3296. — I have seen this fine species 

 in no collection save from Mathews, and it appears to me to be very dis- 

 tinct, allied on the one hand to the groupe to which A. trapeziforme be- 

 longs, and on the other to A. Brasiliense and its allies. I prefer placing 

 it here, on account of the very distinct petioles (1 — 2 lines long) of the 

 pinnules. The texture of the frond is firm, rigid, chartaceous: the sori 

 extend a considerable way beyond the apex on the lower margin (8 — 10 on 

 each pinnule) and are large, firm and thick, occupying the sinus of a lobe, 

 lunulate, but becoming broader beyond the base. 



71. A.sinuosunif Gardn. ; frond tripartite, branches pinnate, 

 pinnttles all petiolate large rhomboidly subcordate membra- 

 naceous the loases very unequal upper margin inciso-lobate, 

 sterile lobes es])ecially sinuate and emarginate, lobules sori- 

 ferous, involucres in a rather deep sinus reniform, stipes 

 rachis and petioles ebeneous dark-brown. A. sinuosum, Gardn. 

 Herb. Bras. n. 3552, and in Hook. Ic. Plant, tab. 504.— ^. 

 smaller more membranaceous, pinnules less sinuated. 



