92 



FERNS : BRITISH AND POEEIGN. 



linear -lanceolate, . ooriaceoua, smooth, the upper portion con- 

 tracted and fertile, plicate and indusiform, forming a linear 

 spike. V&ms obscure ; venules compoundly anastomosing. 

 Beceptacles elongated, compital. Son linear, continuous, trans- 

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

 with numerous suborbicular hyaline scales. 



1. H. spicata, Presl ; Sooh. Fil. Exot. t. 78 ; Lowe's Ferns, ■ 



2, t. 64- B. Acrostichum spicatum, Linn. ; 8m. Ic. 

 ■ined. t. 49. Lomaria spicata, Willd. Gynmopteris 

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

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

 lepis revoluta, Bl. ; Kim^e, Fil. t. 47, /. 2. — Malayan 

 Archipelago. 



2. H. braehystachys, /. 8m. H. spicata, var. brachysta- 



chys, Sodk. Ga/i-d. Ferns, i. 3. TEenitis ophioglos- 

 soides, Hcrrt. Irips. — Malayan Archipelago. 



20. LEPTOCHILUS, Kaulf. 



Vernation uniserial, contiguous or distant. Bhizomes short 

 and caespitose, or long, slender, and surculose. Fronds 6-18 

 inches long, of two forms : the sterile simple, lobed, or pinnatifid, 

 smooth ; the fertile contracted, linear-rachiform, its margia 



Genus 20.— Portion of fertile and sterile fron-1, natural size ; ditto fertile, enlar^d 

 No. 1. 



revolute and indusiform. Veins of sterile frond evident, straight 

 or flexuose, pinnate j venules compotmdly anastomosing. Becep- 



