122 FERNS OF THE LAKE COUNTRY 



decumbent, reclining upon the earth and rising again from it. 

 decurrent, prolonged beyond the point of insertion, as if running 



downwards. 



deflected (deflexed), bent downwards. 

 deltoid, triangular, like the Greek letter D delta. 

 dentate, toothed. 



dicotyledonous, having two cotyledons. 

 distichous, in two rows. 

 dorsal, placed upon the back. 

 dorsiferous, bearing on the back. 

 echinate, prickly, like a hedgehog. 

 endogenous, growing from within increasing by internal 



growth. 

 exogenous, growing from without by additions to the outer 



parts of the stem, 

 fascicle, a bundle, as of larch leaves growing from a common 



point. 



frond, the combination of leaf and stem in ferns, &c. 

 glaucous, bloom-covered, like a plum or cabbage-leaf. 

 herbaceous, herb-like. 

 hippocrepiform, horseshoe-shaped. 

 indusium (plural indusia), the membranous covering of the 



involucre, a sort of calyx or ring inclosing an aggregate of 



flowers. 

 involucriform, divided at the margin into hair-like incurved 



segments. 



involute, having the edges rolled in on each side. 

 lanceolate, knee-shaped. 



linear, lying in lines j also narrow, with parallel margins. 

 lobes, the divisions or segments of a leaf; lobules, smaller lobes. 

 lunate, crescent-shaped. 



monocotyledonous, having only one cotyledon. 

 mucronate, abruptly terminating in a hard short spine. 

 mucronulate, not so distinct a spine. 

 nodule, a knot. 



