7(» niCKSONIA. 



cc'olato inciso-dcnlatc truncate at the apex bearing about 6 

 glabrous sori, .segments truncate cniarginato-dentale, stipes 

 and racliis glabrous." Kanlf. En. Fil. />. 220. 



Hal). PorlD-rico, Vcnlenat. — " SufliineiUly (liffeieul from tlie D. adian- 

 ti>i,lfs in the rorm ol" the pinnae and of the pinnules." 



( i'llhnalc divisions or pinna smalt, less than an inch, generally much smaller. 

 SjK 30— 5i;. 



30. T>.ciculnria,S\Y.; fronds spreading tripinnate, ultimate 

 pimuc ovate or ovato-lanceolate cuneate at the base and de- 

 eiurent upon a winged rachis rather distant obtuse lobed or 

 l)innatirid half way down to the coshi, the base above gene- 

 rally auricled, segments varying in length frequently falcate 

 with the lower ones sometimes acute projecting beyond the 

 sorus, sori .solitary rather large cu]i-shaped, rachis costa and 

 veins glabrous or hairy, (he latter prominent or level with 

 the mri'acc.—Sw. Syv. Fll. p. 137. UWd. Sp. PI. v. p. 487. 

 D. |)ilosiuscida, Iinddi\ Fil. Bras. p. 63 (cxcl. syn.) D. Hook- 

 eriana, Kl. hi Ilerh. Reg. Berol. el in Herb. Hook. — &. frond 

 more membranaceous. Sloaiie, Jam. i. /. 57, y. 1, 2 {excel- 

 lent). Phtmier, t. 31} D. tenera, Mart. PI. Crijpt. Bras. p. 

 90, /. ()6 {e.vcellent). Hook. Gen. Fil. t. 61, A. D. adiau- 

 toides, Link [not H. B. K.) — y. barren segments more cune- 

 ate and serrated above. D. dissecta, Sieh. St/n. Fil. n. 198, 

 {not Sw.) — 3". pinnules larger brighter green less deeply 

 lobed. Patania crosa, Pr. Pterid. p. 138, t. 5,/. 12, 13, {not 

 Dicks, erosa, ^ee.) Hook. Gen. Fil. t. 61, B. 



Hal). Jamaica, Shane, Swartz, aiul prohuhly general in the West-India 

 Islands. Brazil, Raddi, Sellow, Gardner, n. 5327, and 201 , Macrae. Cocos 

 Island, N. Paciiic, Mcnzies, Barclotf. Guayaquil, IJeenke. Vera Cruz and 

 Jalapa, Mexico, Linden. — /3. Brazil, Marlins. — -y. Guatemala, Skinner. 

 Quebrada of Panalniauca, Peru, Mailiews, n. 974. — This is assuredly a veiy 

 variable plant, and tlie ultimate segments and pinimles exhibit rather diffe- 

 rent forms in different pLints and different parts of the same plant. Sloane's 

 ligure is my guide for tlie species, and is excellent for the common state of 

 Jamaica. This isratlier firm in texture, butsuhmembraii.-iceous and remark- 

 able for the deep sinuses of the lower segments of many of tlte fertile pinnules, 

 which arc falcate, curving upwards, and bearing a solitary sovus in the axil. 

 Martins' plate is eciually characteristic, differing in nothing from true cicu- 

 taria, but in being a little more thin and tender. Ofthemc. y. I possess on- 

 ly one specimen, and this with few fertile pinnules. It perhaps scarcely 

 deserves to be deemed a variety. All these are of a dull opaque colour, ge- 

 nerally verging to black wlien dry. Our var. S. lias larger more hairy 

 pinnules, less deeply lobed ; they are of a briglit or lively green, and so ex- 

 actly correspond with the Patania crosa of Presl, tliati cannot but look upon 

 that as the same, and very different from the Dicks, crosa, Kze., although 

 Presl considers it to be identical. The ultimate pinna;, or pinnules, are 

 always on a rachis which is distinctly winged. 



31. D. cornuta, Kaulf.; "fronds tripinnate, pinnules oblong 



