90 
CHAPTER XII. 
Lastrea. — Masses of seed Jcidney-sliaped (that is, 
nearly circular, with an indentation on one side) ; 
indusivm attached at the indentation. 
Lastrea Thelypteris. The Marsh Buchler Fern. 
Erond lance-shaped, hroad at the base, pinnate or 
once divided ; pinnae deeply cleft. In fertile fronds 
the edges of the lobes turn back over the seed, 
which is placed along the margin, giving each lobe 
a pointed and contracted appearance. The root is 
creeping, and the stems smooth and scaleless. The 
fronds are deKcate in texture, and pale green. 
This fern is recorded as growing in Devon, but 
we have never as yet been fortunate enough to find 
it; as its name indicates, it is the inhabitant of 
marshes and moist meadow-lands. 
Lastrea Oreopteris. The Sweet-scented Moumtain 
Fern. (Plate VIII.) 
Pronds lance-shaped ; pinnules dwindling at the 
