4-1. NEPHUODIUM, § LASTREA. 273 



70. N. (Last.) marginale, Mich. ; st. tufted, G-12 in. 1., clotlied j)vincipally at 

 tlie base witli larije lanceolate concolorous scales; fr. 18-2-i in. 1., ()-8 in. br., 

 oblong-lanceolate, Ijipinnate ; jnnnm .3-4 in. 1., 1-1-^ in. br. ; pinnl. ovate-oblong, 

 blunt, nearly entire ; rachis and both sides nearly naked ; texture herbaceous ; 

 lower veinlets of the pinnl. pinnate ; sori marginal. — Ilk. Sp. 4. p. 122. 



Hab. Canada and United States. — About midway between the typical form of Filix- 

 mas and cristatum in general habit. 



77. N. (Last.) laccrum, Baker ; st. 4-8 in. I., densely clothed below with large 

 ovate-lanceolate sca!is;/r. 12-18 in. 1., 6-10 in. br., ovate-deltoid ; pinn(e 4-5 

 in. 1., 1-0-2 in. br., lanceolate ; upper pinnl. confluent, lowest free, lanceolate, 

 acute, subfalcate, nearly entire, but the lower ones auricled on both sides of the 

 base ; texture subcoriaceous ; rachises rather scaly ; both sides naked ; sori 

 confined to the upper third of the frond, occupying nearly the whole of the con- 

 iwici^H pinnl. ; invol. \ lin. br. — Polyp. Thunb, Lastrea, Eaton. 



Hab. Japan and Tsus-Sima. — Very near some of the Indian forms oi Filix-mas, but 

 admitted as distinct by Eaton and Mettenius. 



78. N. (Last.) cri/throsoriim, Hk. ; st.. tufted, 9 in. 1., more or less densely 

 clothed with long lanceolate and linear scales ; fr. 12-18 in. L, 8-12 in. br., 

 ovate-lanceolate ; 2^innce lanceolate, the lowest the largest, 5-0 in. 1., 1^ in. br., 

 cut quite down to the rachis below into oblong-bluntish pinnl. 2-3 in. br., the 

 edge slightly, sometimes spinosely, toothed ; texture firm but herbaceous ; both 

 sides naked ; rachis slightly scaly ; sori in rows of 0-9 to a pinnl. near the 

 midrib ; invol. \ lin. br., flat, bright-red when young. — Hk. Sp. 4. ]). 120. t. 253. 



Hab. Japan and China. — Intermediate in appearance heiwQQn Aspid. vanum and 

 N. Filixmas. 



79. N. (Last.) iioridanum, Hk. ; st. in. or more 1., with a few ovate con- 

 colorous scales; fr. 1^-2 ft. 1., 6-8 in. br., oblong-lanceolate; fertile pinnce 

 confined to the upper half, close, lanceolate, 3-4 in. 1., 1-lj in. br., cut down to 

 a narrowly-winged rachis into oblong, slightly crenated, blunt pinnl., with their 

 own breadth between them and two rows of sori reaching from the midrib 

 nearly to the edge ; barren pinnce broader, the lower ones rather reduced and 

 subdeltoid, all not so deeply cut and the pinnl, close ; texture herbaceous, both 

 sides naked. — Hk. Fil. Ex. t. 99. 



Hab. Louisiana and Florida. — Perhaps a form of N. cnstatum, with which it agrees 

 in its barren pinnse, differing in its dimorphous fertile ones. 



80. N. (Last.) cristatum, Mich. ; st. tufted, 6 in. or more 1., sparingly clothed 

 with ovate concolorous scales ; /;■. 12-18 in. 1., 3-5 in. br., narowly oblong- 

 lanceolate ; lower jnnna^ deltoid, 2 in. 1., 1 in. or more br., the lowest pair about 

 equal to the next, cut down nearly, or quite, to the base below into broad, 

 blunt, oblong, slightly pinnatifid ^w;?i/. / ^ce^A not aristate ; texture herhaceous ; 

 stramineous rachis and both sides nearly naked ; iiivol. naked. — Hk. Sp. 4. 

 /). 121. — /3, N. idiginosum {Ncwm. sub Lasirca) ; fr. broader ; pinnl. more acute 

 and more deeply cut, teeth mucronate. — Brit. F. t. 17. A. spinuloso-cristatuni, 

 Easch. 



Hab. Scandinavia to N. Italy and Greece ; Hudson's Bay territory, Canada, United 

 States. — Our /3 is a connecting Hnli between cristatum and spinulosum, the barren fronds 

 resembling most the former, and the fertile ones the latter. 



81. N. (Last.) borneense, Hk. ; rhizome stout, wide-creeping, densely fibril- 

 lose ; St. 6 in. 1., firm, erect, brown, naked; fr. 12-18 in. 1., 4-6 in. br., 

 lanceolate ; pinnw 2-3 in. 1., | to 1 in. br., cut down to a broadly-winged rachis 

 into linear-oblong deeply pinnatifid lobes ; ^e^^itrc subcoriaceous ; j-acAis and veins 



2 M 



