LINDSAY A. 



351 



quite marginal, are transversely oblong or linear (very narrow) ; the outer 

 valve of the involucre is membranous and similar in shape to the spore mass 

 which it covers, but the frond on the other side is usually produced beyond 

 them and not altered in texture. 



EuLiNDSAYA (Eu-lind-say'-a) (the true Lindsayas), Dryander. This is 

 a well-marked section, and by far the largest one of the genus. The plants 

 of which it is formed have their head-quarters in Tropical America, Asia, 

 and Polynesia ; their distribution, however, extends to the Mauritius, Japan, 

 and Australia. Their habit is very similar to that of certain Adiantums, and 

 their fronds are sometimes pellucid. 



IsOLOMA (Is-ol-o'-ma), /. Smith. In habit and texture the plants of 

 which this group is composed resemble Pteris rather than Adiantum, and 

 the cuneate (wedge-shaped) species appear to be very closely related to 

 Stetioloma, of Fee, which forms a sub-division of the genus Davallia. The 

 fronds of certain species are simple (undivided), while those of others are 

 either pinnate (once divided to the midrib) or bi-. or tripinnatifid (twice or 

 three times divided nearly to the midrib), with their ultimate divisions 

 conspicuously wedge-shaped. 



ScHizoLOMA (Schiz-ol-o'-ma), Gaudichaud. The fronds of the species 

 belonging to this section are either undivided or simply pinnate (only once 

 divided to the midrib) and not transparent. They also have their veins 

 more or less anastomosing (running into one another). 



Synaphlebium (Syn-aph-leb'-i-um), /. Smith. In habit and texture, 

 the plants of this section greatly resemble Eulindsayas, from which they 

 differ only by the anastomosing nature of the veins of their leaflets, which 

 are unilateral (disposed along one side of the frond). 



Culture. 



If the species of this genus are more extensively represented in herbaria 

 than in gardens, it is not on account of their deficiency in good qualities, 

 but simply owing to the difficulties with which their importation is 

 usually beset. Time after time, some of the most beautiful representatives 

 of the genus have arrived in Europe ; but, although to all appearances in 

 good condition on their arrival, from some inexplicable cause they have just as 



