CHAPTER XXXI, 



LINDSAY A, " Dryander. 

 (Liiid-say'-a.) 



LTHOUGrH but poorly represented in European gardens, yet 

 this is a somewhat extensive genus, comprising about fifty 

 species of very handsome, stove and greenhouse Ferns, the 

 habitats of which are mainly confined within the tropics. 

 They form a distinct tribe {Lmdsayeoe, named after Archibald 

 Lindsay, an English botanist of the last century), which is distinguished by 

 the disposition of the sori (spore masses) : these are placed in a line at, or 

 very near, the edge of the frond, and are provided with an involucre (covering), 

 the inner valve of which is membranous (parchment-like), the outer (obsolete 

 in Bictyoxifliium^ the only other genus belonging to the tribe) being formed 

 of the margin of the frond. 



In Hooker and Baker's "Synopsis Filicum " Lindsay a (commonly called 

 Lindscea) forms Genus 20. Most of the species have one-sided leaflets of 

 a somewhat pellucid (transparent) though leathery texture, approaching in 

 shape a quarter of a circle. Lindsayas are readily distinguished through the 

 sori, marginal or nearly so, being placed at the summit of and uniting two 

 or more veins, and through their being furnished with a double involucre 

 opening outwardly. According to their characters, the plants forming this 

 genus are divided into five distinct sections as follow : 



DiELLiA (Di-eF-li-a), Brackenridge. In this section, which is almost 

 exclusively composed of species from the Sandwich Islands, the sori, not 



