38 6. ALSOPHILA. 



2i-3 in. 1., \ in. w., oblong-acuminate, deeply nearly to the costa pinnatifid ; 

 lobes oblong, falcate, acute, entire, margins slightly reflexed ; sori copious, occu- 

 pying the space between the costule and the margin ; rachises and costce beneath 

 free from scales or pubescence. 



Hab. Chimborazo, alt. 2,500 ft., Spruce, n. 5740. "A pretty Fern when growing." 

 Spruce. 



33. A. aterrima, Hk. ',^st. castaneous, copiously aculeate, and at the base 

 shaggy with very long (1 in.), dense, ferruginous, flexuose scales and fine 

 hairs ; Jr. ample, thick, carnoso-coriaceous ; black above, a little paler and 

 chocolate-coloured beneath, villous above; rachis shaggy; costce and costules, espe- 

 cially beneath, clothed with deciduous, tawny, lanose hair ; prim, pinnae 1 ft. 

 and more 1., pinnl. 2-2^ in. 1., 4 lines w., deeply to the costa pinnatifid ; lobes 

 oblong, very obtuse, entire ; sori chiefly on the lower half of the lobes (about 6), 

 close to the costa, ferruginous. 



Hab. Near Tarapota, E. Peru, Spruce, n. 4713. The blackest-looking species, when 

 dry, I am acquainted with, and of a very firm and coriaceous texture. 



34. A. pruinata, Klf . ; unarmed ; st. densely lanigerous at the base ; fr. coria- 

 ceous, glaucous, bi-tripinnate ; prim, pinnce petiolate, 12-18 in. 1., ovato-lan- 

 ceolate ; pinnl. 3-4 in. 1., 1 in. w. ; petiolulate, from a broad base oblong- 

 acuminate, deeply pinnatifid, or again pinnate ; lobes or ult. pinnl. % in. 1., 

 lanceolate, very acute, deeply or pinnatifidly and sharply serrated ; sori solitary, 

 near the costule, one to each lobule or serrature ; costce and costules beneath 

 often very hairy, and hairs mixed with the capsules on a small recept. Hk. Sp. 

 1. p. 47. Poloyp. griseum, Schk. Fil. t. 25. Trichosorus glaucescens, densus 

 et frigidus, Liebm. Lophosorus, Pr. 



Hab. Tropical America and W. Ind., extending as far south as Chili ; Juan Fernandez. 



35. A. frigida, Karst. ; " caud. not lofty; st. and racMses clothed sparingly 

 with deciduous tomentum and, especially at the base, muricated ; fr. ovato-lan- 

 ceolate, tripinnate, coriaceous ; prim, and second, pinnce from a broad base 

 gradually narrower and acuminated ; pinnl. -|in. 1., oblong, more or less adnate at 

 the base, densely squamose beneath, pinnatifid ; the lobes falcate, obtuse, crenate, 



-separated by a very narrow, acute sinus, penniveined ; the margin revolute ; 

 veins simple or forked, the lower ones on the middle of the back or in the fork 

 soriferous ; recept. semiglobose, pilose." Karst. Fl. Columb. t. 30. 



Hab. Andes of Bogota, alt. 15,300 ft., Karsten. 



36. A. mexicana, Mart. ; "fr. tripinnatifi do-partite, sparingly hirsute on both 

 sides ; st. and rachis rough with hairs and furnished with scales varying in size ; 

 pinnce linear-oblong, acute ; pinnl. linear-acuminate, deeply pinnatifid ; ultimate 

 lobes obliquely and broadly ovate, entire or emarginato-bidentate ; sori on each 

 lobe near the rachis 2-8." Mart. Cr. Bras. p. 70. t. 45. Hk. Sp. 1. p. 47. 



Hab. Mexico. 



37. A. myosuroides, Liebm.; "caud. 10-10 ft, 1., 3-4 in. diam. ; fr. ample; 

 pinnce patulous, petiolate, elongato-lanceol. 1^-2 ft. 1. ; pinnl. divergent, 3-3^ in. 

 1., ij in. w., elongato-lanceolate, long-acuminate, acute, deeply pinnatifid ; lobes 

 from a dilated base linear-lanceolate, falcate, rather obtuse, crenulato-falcate ; 

 margins a little revolute, the sinuses angled ; the apex of the pinnl. contracted, 

 4-1 in. ]., 1-2 lines w., crenated ; costa on both sides appresso-pilose ; sori 

 numerous on each lobe, at length confluent ; st. 1 ft. 1., 1 in. thick, aculeolate 

 with straight prickles." Liebm. F. Hex. p. 134, 



Hab. Mexico, on mountains, alt. 2,400 ft., Liebmann. The author seems to allude to an 

 affinity with Als. armata, Pr. I possess copious specimens from Dr. Liebmann gathered 



