46 



slender, bright glossy pale or chestnut brown. — Plum. Fil. t. 47. — N. 

 sitiorum, Jenm. 



Frequent or infrequent on open banks skirting forests at 4,000 ft. 

 altitude; gathered at Moody's Grap, where it grows with N. nimbutum. 

 It possesses the bright straw or semichestnut colouring of N. Jenmani, 

 but is a much smaller plant. Stipes and rachises are slender, pinnae in 

 distant opposite narrow patent pairs, diminishing gradually in a direct 

 line from the base outwards, the long acuminate and attenuated apices 

 usually entire, the basal segments enlarged and increasing in size as 

 the pinnae dwindle to very minute auricles on the short stipites, the upper 

 and larger of the two from the obliquity of the base of the pinnae, over- 

 lapping the rachis, the sori intramarginal and the margins reflexed. 

 There is a specimen from Wilson in Herb. Kew, assigned to concinnum, 

 which species however has a wide-creeping rhizome. 



10. N. Sprengelii, Hook. — Rootstock erect, stoutish, often a span 

 high ; stipites strong, caespitose, stiffy erect, 4-8 in. L, channelled, 

 scaly and dark-coloured at the base ; fronds bipinnatifid, erect, l|-4 

 ft. 1. 6-12 in. w., chartaceous, naked or slightly glandulose, bright 

 green; reduced gradually each way, — at the base to distant minute 

 segments or mere glands, which reach nearly down the stipites ; pinnae 

 contiguous above, subdistant or distant below, usually opposite, 

 numerous, spreading, nearly horizontally, bearing a papillose gland at 

 the base beneath, sessile, broadest at the base and tapering gradually 

 outward to the finely acuminate serrate-entire point, 4-7 in. 1. \ nearly 

 1 in. w. ; cut almost to the costae in'o close spreading bluntish or 

 acute subfalcate segments, which are 4-6 li 1. and 1-1 J li. w. at the 

 connected, but slightly dilated bases, the basal pair usually the largest 

 the edges even and reflexed ; rachis strong, subangular, stramineous, 

 naked or with a few scattered fibrillae toward the base ; costae and ribs 

 puberulous ; veins simple, 12-15 to a side, close ; sori medial or nearer 

 the margin ; involucres pale, naked, fugacious. 



a. var. rivulorum. Fronds smaller ; segments not reflexed at the 

 edges. — Polypodium rivulorum Radd. Planl. Brasil, t. 35 



Common on the open banks, by waysides, and in marshy places from 

 the lowlands up to 4,000 or 5,000 ft. altitude. Probabty spread from 

 Florida right down through the West Indies, but the species has been 

 much confounded. It has the upright habit, especially the large low- 

 land state has, of resino-fcetidum, but is less stiff and the margins are 

 less decidedly reflexed over the sori. The sori are really medial, but 

 the folding back of the edges of the margins, makes them appear nearer 

 thereto than to the midrib, except in a, the smaller mountain state. — 

 Aspidiim, Klf. 



11. N. limbatum, Desv. — Rootstock erect, scaly; stipites erect, 4-6 

 in. L, dark, and deciduously scaly at the base ; fronds bipinnatifid, 

 1J-2J ft. L, 6-8 or 10 in. w., chartaceous, naked or puberulous- glan- 

 dulose, bright green above, paler beneath ; reduced each way, gradually 

 at the base to minute segments or mere glands; pinnae numerous, 

 spreading nearly horizontally, sessile, with a gland at the base beneath, 

 where they are broadest, thence tapering to the acuminate serrate-entire 

 point, J-f in. b., 3-5 in. L, pinnatifid nearly to the costae ; segments 

 close, linear-oblong, blunted or rounded, connected but not, or barely 

 dilated at the bases, 1£ li. b. 3-4 li. 1. ; margins crenate-entire, or the 



