74 



FERNS : BRITJ3H AND FOREIGN. 



1. OLEANDRA, Oav. 



Rhizome surculose or erect, subfruteseent and ramose ; node 

 of articulation sessile, or more 

 or less elevated on the stipes. 

 Fronds simple, entire, linear- 

 lanceolate, 1 — lj foot long, smooth 

 or pilose. Veins simple, or once 

 or twice forked ; venules free, 

 parallel, their apices curved out- 

 wards, forming a narrow car- 

 tilaginous margin. Receptacles 

 Genus 1. -Portion of mature frond punctiform, medial, or basal on 

 —under side. No. 4. the anterior venules. 8ori round, 



transversely uniserial, or irregular. Indusium reniform, or 

 rarely orbicular. 



1. O. nodosa, Presl; Hook. Sp. Fil. 4, p. 157. Lowe's Ferns, 7, 



t. 17. Aspidium nodosum, Willd. (Plum. Fil. t. 136) ; 

 Hook. Exot. Fil. t. 117. Aspidium articulatum, Schk. 

 Fil. t. 27. — West Indies and Guiana. 



2. O. articulata, Presl. Aspidium articulatum, Sw. (excl. 



Syn. Plum, et Schh.). — East Indies, Mauritius, and 

 Natal. 



3. O. "Wallichii, Presl. ; Hook. Sp. Fil. 4, p. 158. Aspidium 



Wallichii, Hooh. Exot. Fil. t. 5. Kunze, Fil. t. 19. 

 Neuronia Asplenioides, E.Bon. — East Indies. 



1. O. neriiformis, Oav. ; Hooh. Fil. Exot. t. 58 ; Lowe's Ferns, 

 7, t. 16. Aspidium neriiforme, Sw. ; Kunze, Fil. t. 

 18. Ophiopteris verticillata, Reinw. — Var. hirtella, 

 Moore. Olcaudra hirtella, Miq. ; Kunze, Fil. t. 129. 

 Oleandra pilosa, Hooh. et Bauer, Gen. Fil. t. 45 B. — 

 East Indies, Malayan Archipelago, and Tropical 

 America. 



Tbibe II.— DAVALLIE^E. 



Sori round or oblong, terminal, marginal. Indusium lateral, 

 interior, plane, or its sides more or less adnate, forming a 

 vertical cyst, open exteriorly. 



