682 FILICES. 



+t Sori fiabellate : no midrib ; leaf coriaceaus. 



197. A. dimidiatum, Sa. Leaf pinnatisect, coriaceous; segments rhomboid o\ rham- 

 boid-oblong, irregularly serrate at the upper margin, incised or unequally Z-Jid at the acu- 

 minate summit, obliquely cuneate at the dimidiate base, lowest conform : rhachis flattish, 

 convex beneath : no midrib ; veins fiabellate, narrowly dichotomous : petiole blacJdsh ; 

 sori Uuear, radiating, unequal in length aud distance from the base. — Kee. Farnkr. t. 48. 

 Metten. Fit. Lvps. t.lS.f. 22.— A. zamiifolium, Z2«.— Segments 3"-] " long, l"-6"' broad ; 

 longest sori 8"'-12"' long, irregular in their position toward the indusium. — Hab. Ja- 

 maica!, Mac/., Wiles, Shepherd; [Cuba ! to Peru ! ; trop. Africa!]. 



, 'tH ^i"^ c/m« to the midrib below ; leaf coriaceous-chartaceous. 



198. A. erosum, Metten., Hook, (non L.). Leaf pinnatisect, coriaceous : segments 

 trapeeoid-lanceolate or lanceolate-linear, acuminate, irregularly serrate or inciso-serrate 

 above the obliquely cuneate base, lowest conform ; rhachis channelled, convex beneath : veins 

 narrowly dichotomous or forked, nearly excurrent : petiole pale or pale-brown; sori linear, 

 extending from near the midrib to the serratures. — Eook. Spec. 1. 198.— A. salicifolium, i. 

 {Plum. Fit. t. 60), is probably this species, but it is useless to restore old names in Asple- 

 nium, as absolute certainty is not to be attained, and often allied species were formerly not 

 distinguished. A. falcatum, &u>. see. Kze. (non Lam.). — Segments 2"-4" long, 1"'-$'" 

 broad above the base ; sori 6"'-9"' long. — Hab. Jamaica !, Pd., Wils., March, in mountain 

 woods; [Cuba! Haiti]. 



199. A. Serra, Langsd., Fisch. Leaf pinnatisect, chartaceous : segments long, lanceo- 

 late-acuminate or oblong-lanceolate, sharply and unequally serrate above the cuneate or up- 

 ward produced, often petiolulated base, lowest conform : rhachis channelled, convex beneath : 

 veins narrowly dichotomous, excurrent : petiole brown ; sori oblong, approximate to the 

 midrib, and mostly subparallel to it, much distant from the margin. — A. zamiifolium, PI. 

 Carib. {exclus. syn.) : the broad-leaved A. Serra, (3. Imrayanum, Hook. ! A. erosum, &;..'' 

 —Segments 4"-6"(-10") long, 8"'-20"' broad ; sori 4"'-6"'(-12"') long.— Hab. Jamaica!, 

 Pd., Wils. ; Dominica !, Imr. ; [Cuba to Fi-euch islands ! ; Venezuela ! to Brazil ! ; trop. 

 Afirica I]. 



200. A. auritum, S/m. Leaf pinnatisect, chjtrtaceons : segments lanceolate-linear or 

 oblong-lanceolate, usually acuminate, upwards auripled at the cuneate base, inferior mostly 

 pinnatipartite at the ^auricle, or with the divisions decrescent toward the serrulate apex, 

 lowest conform : rhachis margided above or to the base : veins forked, inferior dichotomous, 

 branches terminated near tlie margin: petiole pale; sori oblong, approximate to the midrib 

 below, oblique, distant from, the margin. — SI. t. 33. f. 2. Schk. Crypt, t. 130. b. sup. 

 dextr. — A. erosum, L. {ex. ic. SI.). — ^Variable ; segments l"-3" long, 2 '-6'" broad above 

 the auriclE ; sori usually li"'-2"' long, often confluent. 



o. Segments divided only at or near the auricle, or serrulate only. — A. umbrosum, Kaulf. 



/3. recognitum, Kze. Segments pinnatipartite-pinuatifid. —Plum. Fil. t. 46. Metten. 

 Fit. Lips. t. 9./. 5. 6. — A. dispermum, .ffae. 



Hab. Jamifica !, Pd., Bancr,, on trees (a) j Dominica !, Sieb., Imr. (o, iS) ; [Cuba ! to 

 French islands ! ; Mexico ! to Brazil ! ; Galapagos Ij East Indies !]. 



201. A. bissectum, Sw. Leaf pinnatisect, chartaceous : segments lanceolate-linear, 

 ilatt-owly acuminate, obliquely cuneate at the base, pinnatifid, lowest shorter : inferior lobes 

 iiidiso-2-dentate : rhachis slightly channelled, convex beneath : veins forked, lowest dichoto- 

 ihOUs, branches much produced into the teeth : petiole purplish-brown ; son linear-oblong, 

 approximate to the midrib, subparallel to it, much distant from the margin. — Hook. Spec, 

 t. 192.— Segments 2"-3" long, 3"'-6"' broad at the base, dark-green ; sori 14"'-2'" long. 

 — Hab. Jamaica !, JKffi^., Wiles; [Cuba ! to Venezuela]. 



202. A. furcatum, Thunb. Leaf pinnatisect, coriaceous, often hairy beneath : seg- 

 ments pinnatipartite, lowest conform : special segments cuneate-rhomboid or linear, incised 

 or dentate at the summit (-pinnatifid) : rhachis villous-paleaceous, narrowly channelled, 

 convex beneath : veins fiabellate, narrowly forked or dichotomous, nearly excurrent : petiole 

 dark-brown ; sori linear, approximate-confluent, subparallel or little radiating, innei-most 

 lining the inconspicuous midrib. — Hook. 6rev. Ic. t, 189. — A. pramorsum, Sw. : the oldest 



