SPECIES AND VARIETIES OF BRITISH FERNS. 57 
8. P, angulare, Fred, — Fronds bipinnate, lax, pinnules 
oblong or ovate-subfalcate, auricled^ bluntish or acute, 
obtusely angled at the base, stalked. Plate V. fig. 2. 
ran subtripinnatum. — Fronds ample; lower pinnules 
large, and again pinnate, otherwise normal. 
ran proliferum.-^ — Fronds bearing bulbils ; pinnules 
narrow, acute, deeply pinnatifid, with distant atte- 
nuate lobes. 
ran imbricatum. — Fronds very narrow ; pinnules ob- 
long-obtuse, overlapping. 
ran alatum. — Fronds normal in outline ; pinnules con- 
nected by a broad wing of the rachis, which obliter- 
ates the stalk. 
mr, cristatum. — Fronds and pinnae tasselled at their 
extremities. 
Genus 5. LASTREA, Presl, 
1. L. Thelypteris, Pm^.—Fronds pinnate, not glandular ; 
sori submarginal, on more or less contracted fronds ; 
caudex creeping. Plate VI. fig. 1. 
2. I. montana, Moore. — Fronds pinnate, covered with 
sessile glands ; caudex tufted. Plate VII. 
