92 



FERNS : BRITISH AND FOREIGN. 



linear -lanceolate, coriaceous, smooth, the upper portion con- 

 tracted and fertile, plicate and indusiform, forming a linear 

 spike. Veins obscure ; venules compoundly anastomosing. 

 Receptacles elongated, compital. Sori linear, continuous, trans- 

 verse, on the upper portion of the fronds confluent, furnished 

 with numerous suborbicular hyaline scales. 



1. H. spicata, Presl ; Hook. Fil. Exot. t. 78 ; Lowes Ferns, 



2, t, 64 B. Acrostichum spicatum, Linn. ; Sm. Ic. 

 ined. t. 49. Lomaria spicata, Viilld. Gymnopteris 

 spicata, Presl. ; J. 8m. Gen. Fil. Hymenolepis ophio- 

 glossoides, Kaulf. ; Kunze, Fil. t. 47, /. 1. Hymeno- 

 lepis revoluta, Bl. ; Kunze, Fil. t. 47, /. 2. Malayan 

 Archipelago. 



2. H. brachystachys, J. Sm. H. spicata, var. brachysta- 



chys, Hook. Gard. Ferns, t. 3. Taenitis ophioglos- 

 soides, Sort. Lips. Malayan Archipelago. 



20. LEPTOCHILUS, Kaulf. 



Rhizomes short and caespitose, or long, slender, and surculose. 

 Fronds 618 inches long, of two forms : the sterile simple, lobed, 

 or pinnatifid, smooth ; the fertile contracted, linear-rachiform, 

 its margin revolute and indusiform. Veins of sterile frond evi- 



Genus 20. Portion of fertile and sterile frond, natural size; ditto fertile, enlarged. 



No. 1. 



dent, straight or flexuose, pinnate ; venules compoundly anas- 

 tomosing. Receptacles elongated compital. Sorus linear, con- 



