490 The Cryptogamous Plants of Dr. Roxburgh, 



Fructifications numerous, minute approximate in paral- 

 lel lines, one on each side of the diverging veins ; each dot 

 composed of a number of minute, pedicelled globules, girt 

 with their brown crenulated, elastic rings ; there is a constant 

 succession of them for a lenojth of time. 



Note, — It may be P, unituniy as it agrees better with the 

 Linnean definition of that plant, and with the figures in 

 Burmans Thesaurus Zylanicus, and Sloane's History of Ja- 

 maica^ than with the definition of P. parasiticum^ though 

 the figure of that species in Rheede's Hortus Malaharicus 

 agrees with this plant tolerably well, the tail of the fronds 

 excepted. 



18. P. acuminatum. R. 



Fronds alternately pinnate, smooth, (3-6 feet high ;) 

 leaflets ensiform, cuspidate, with base truncate, serrate, 

 serratures very small, but distinct towards the top. Fructi- 

 fications in lines parallel with the veins. Involucre minute, 

 and soon disappears. 



19. P. mucronatum, R. 



Fronds alternately pinnate ; stipes somewhat hairy ; pinnae 

 ensiform, acutely serrate, finely acuminate. Fructifications in 

 numerous minute spots, arranged in lines between the veins ; 

 no involucre. 



A native of Silhet. In the Botanic Garden, at Calcutta^ 

 it grows obliquely to the height of about 2 feet, and fructi- 

 fies during the cold season. The texture of the leaves is hard, 

 and glossy: the apex quite ensiform, the serratures of a 

 middling size, and very acute. 



20. P. tenerum. R, 



Fronds alternately-pinnate ; pinnae linear-lanceolate, gash- 

 serrate, acuminate. Fructification in a few spots on each 

 side of the veins : involucre reniform. 



A native of Silhet. In the Botanic Garden at Calcutta^ 

 it grows to the height of from \2 to 18 inches, is of a deh- 

 cate soft texture, and somewhat villous. 



