148 NEPHRODIUMj § LASTREA. 



1-1 1 foot long coriaceous glossy deltoid acuminate quadri- 

 pinnate, primary (secondary and tertiary) pinnae petiolate 

 broad-oblong acuminate, basal pair semiovate, the lowest 

 inferior secondary pinnte the longest, all of them uniformly 

 divided in a pinnated manner to the last division, the ulti- 

 mate pinnules, which are obliquely ovate or obovate, 2-3 lines 

 long cuneate and subdecurrently petiolate with 2-3 sharp mu- 

 cronate teeth towards the apex, veinlets more or less forked, 

 sori generally one to each lobe or ultimate pinnule large, 

 involucre large cordato-reniform often with a very indistinct 

 sinus pale-brown sulDCoriaceo-membranaceous. — Aspidium, 

 Sw. Sijn. Fil. p. 57. fVilld. Sp. PL v. p. 272. Met ten. 

 Aspid.p. 68. Lastrea, Moore. Polypod., Sw.Fil.Ind. Occ. 

 m. p. 1692. Polystichum aspidioideum, Kl. {young fronds.) 

 Aspid. Klotzschii, Hook. Ic. PL t. 923. Lastrea, Moure. 

 Aspid. leetum, Sw. Vctensk. Acad. Handel. 181 J. Ixiii. t. A.f. 

 3 [fide Metten.). — Var. ft, riyidissimuyn; ultimate pinnules 

 narrow linear-spathulate subincised. 



Hab. Tropical America, frequent : Jamaica, Wilson, Purdie ; New Granada, 

 all collectors ; British Guiana, Brazil, Gardner, n. 1881 and 5943, etc. — Var. /3. Ja- 

 maica, Purdie, Wilson (who observes, " 1 mistook this at first for the leaf of a 

 carrot "). St. Domingo, Schomburgk. New Granada, Linden, n. 1297. Schlim, 

 n. 323. 



149. N. (Lastrea) macrostegium, Hook. ; caudex ?, stipes 

 (lower portion only in my possession a span long) stout ^ of 

 an inch in diameter brown very paleaceous at the base with 

 dense soft long subulate crisped scales the rest crinite with 

 longer more scattered firmer often falcate ones, frond ample 

 deltoid 2 feet long very broad deltoid-ovate acuminate coriace- 

 ous everywhere glabrous quadripinnate, basal primary pinnae 

 12-14 inches long semiovate their lowest secondary pinnae 

 very long 6-8 inches resembling the rest of the primary 

 pinnae bipinnate, tertiary pinnte more or less petiolate un- 

 equally oblongo - ovate obtuse or acute pinnatifid below 

 pinnate and cuneate subauriculate, the lowest superior pin- 

 nule and segment rather the largest, ultimate pinnule 2-3 

 lines long ovate obtuse and obtusely crenato- serrate, veinlets 

 once or twice forked, sori 4-6 on each pinnule in two rows 

 between the costule and margin, involucres so large that they 

 cover nearly the whole underside of the segments or ultimate 

 pinnules pale-brown membranaceous reniform substipitate 

 persistent with a deep depression at the sinus and waved at 

 the margin. 



