TONQUIN FERNS. 265 



broad. Veins pinnate, with 3-4 -jugate veinlets, anastomosing as 

 in Eunephrodium in the outer half of the pinnules. Sori linear, 

 beginning at the base of the veiulets, the lower £ in. long. Indusium 

 very narrow, glabrous. — Habit of South American A. costale Sw., 

 but veins united. > 



1821. Aspidium aculeatum Sw. 



1818. A.laserpitiifolium Mett. 



1849. A.falcatum Sw. 



38, 1795, 1820. Nephrodium Filix-mas Eich. 



23, 24, 1863. N. syrmaticum Baker. 



75, 1939. N. odoratum Baker. 



72. N. setigerum Baker. 



1791, 1802, bis. N. dissectum Desv. 



(138*), 1815. Nephrodium (LASTREA)obovatum,n.sp. — Stipe 

 a foot long, slightly scaly ; paleaa firm, lanceolate, nearly black, with 

 a pale brown edge. Frond oblong-deltoid, decompound, thin, 

 glabrous, 1^-2 ft. long. Lower pinnae the largest, produced on the IS 

 lower side ; central oblong-lanceolate, with lanceolate pinnules cut 

 down to the rachis. Final segments obovate or oblong, obtuse, 

 \-\ in. broad. Veins pinnate in the final segments ; veiulets very 

 ascending. Sori medial on the veins. Indusium small, fugacious. — 

 Near N. catopteron Hook. y 



(145*), 1836. Nephrodium (Lastrea) setulosum, n. sp. — 

 Frond ample, deltoid, bipinnatifid, moderately firm in texture, 

 green on both surfaces, setulose on the ribs beneath ; rachises dull 

 brown, not paleaceous. Lower pinnse oblong-lanceolate, a foot or 

 more long. Pinnules sessile, lanceolate, 3-4 in. long, an inch 

 broad, the lowest cut down to a narrow wing into linear-oblong 

 tertiary segments, |-|- in. broad. Veinlets 8-9-jugate in the 

 tertiary segments, simple or forked. Sori placed midway between 

 the midrib and margin, a dozen or more in the lower tertiary 

 segments. Indusium small, reniform, persistent. 



26, 1805, 1806. N. Lcuzcanum Hook. 



51. N. penniyerum Hook? — Pinna3 like those of permigerum, but 

 rootstock wide-creeping.— May be a distinct new species. 



1864. N. truncation Presl. 



(202*), 1947, 1948. Nephrodium (Sagenia) quinquefidum, 

 n. sp. — Stipes tufted, 1£ ft. long, naked upwards, bearing many 

 lanceolate brown palese in the lower third. Frond thin, deltoid, 

 quinquefid, £- 1 ft. long, nearly or quite as broad as long ; central 

 segment oblong, acute, 2^-3 in. broad, irregularly repand ; lower 

 pair of segments quite distinct from the end one, sessile, deeply 

 forked on the lower side at the base. Main veins parallel, arcuate, 

 about half an inch apart, with numerous cross veinlets like those 

 of a Camhyloneuron, and copious small areola. Sori copious, minute, 

 various in form, very dense, often confluent. Indusium minute, 

 fugacious. — Near N. tematum Baker. 



(212 ;: ), 1857. Nephrodium (Sagenia) stenopteron, n. sp.— - 

 Stipe brown, reaching a length of 1^-2 ft., clothed towards the base 

 with copious large linear brown membranous paleai. Frond oblong- 

 deltoid, membranous, green and glabrous on both surfaces, 1^-2 ft. 



/ 



S 



