Pinnule of fertile Frond- -under side. 



HEMITELIA HORRIDA. 



R. Brown. Hooker. J. Smith. Moore and Houlston. 



PLATE l.X. VOL. VIII. 



Potypodium horridum, 

 Cyathea horrida, 

 " commutata, 



Linnaeus. Plumiek. 



J. Smith. Peesl, (Not of Sieber.) 



Speengel, (Not of Plumiee.) 



Eemitelia — Half-perfect, in reference to the indusium resembling a half-cup. 



Horrida — Horrid. 



A noble species, of large size, and only to be seen in good 

 collections. 



An evergreen stove Fern. 



Native of Jamaica, Trinidad, St. Domingo, Martinique, and 

 St. Vincent. 



Introduced into the Royal Gardens, Kew, in 1843, having 

 been received from Mr. Purdie. 



The fronds, which are glabrous, are bipinnate, broadly lan- 

 ceolate in form, and are covered beneath at first, as well as the 

 rachis, with cobwebby tomentum. Pinnae sessile, profoundly 

 pinnatifid, almost to the base ; segments approximate, lanceolate, 

 acuminate, and somewhat falcate; apex crenate-serrate. 



Rachis and stipes aculeate, having a scale on each prickle. 



Fronds terminal, and adherent to an erect arborescent caudex. 



Veins pinnate, lower veinlets anastomosing, and forming an 



