212 91. OPHIOGLOSSACE^E. 



2. H. WILSONI, Hook. Scottish Filmy -fern. Resembling the 

 last, but easily known by the pinnee not being on the same plane 

 as the rachis, recurved, with the involucres projecting forward in 

 opposition to the segments of the frond. Involucres inflated, 

 more or less stalked, quite entire on the upper edges. 



Very frequent. Wet rocks and banks, under heath. (H) P, 6 7. "Bowling 

 hills," the late Wm. Gourlie; Pillar craigs; Gourock; Inverkip glen; "banks of 

 Loch Lomond; glens above Kilmun; Glen Messen; Tigh-na-Bruich ; Bute; 

 Fairlie glen ; Cumbrae and Arran. 



9 O.-O SMUNDACE^. 



1. OSMUNDA. Osmund. 



O. REGALIS, L. Royal Osmund, Flowering -fern. Rhizome 

 very hard, stout, forming a swollen trunk, covered by blackish 

 wiry fibres. Fronds erect or arching, 2 12 ft. high. Barren ones 

 bipinnate; pinnules oblong, nearly entire, obtuse, somewhat 

 auricled at the base. Fertile fronds with clusters of spore cases, 

 in panicles, 011 the terminal branches. 



Frequent Boggy places and margins of woods. (B) P. 6 8. Between Inverkip 

 and Gourock ; banks of Loch Lomond in several places ; Kilmun ; Dunoon ; below 

 Wemyss bay; Cumbrae; Bute and Arran. Owing to the rapacity of dealers, who 

 are more alive to regal impress than royal beauty, this fern is rapidly disappearing 

 from localities to which it lent a charm. 



9L-OPHIOGLOSSACE^1, 



1. OPHIOGLOSSUM. Adder's-tongue. 



O. VULGATUM, L. Common Adders-tongue. Rhizome or 

 caudex thickened, descending deeply into the soil, producing a 

 lateral bud, from, which is developed next year's stem. Frond 

 solitary, 2 8 in. high, ovate or oblong, entire, narrowed below, 

 sheathing yellowish green. Fertile branch narrow, erect, with 

 spore cases along the two edges, opening transversely. 



Not common. Moist pastures. (B) P. 5 6. " In the pastures about Wood- 

 hall," Hopk. "Pastures at Possil, near the porter's lodge," Fl. Sc.; "Paisley 

 Canal bank," James Ra msay ; Cambuslang glen; Craigenglen; Gourock; Cumbrae 

 and Arran. 



2. BOTRYCHIUM. Moon-wort. 



B. LUNARIA, Sw. Common Moon-wort. Rhizome branched, 

 with root-like processes from its crown. Frond erect, 2 6 in. 

 high. Barren branch solitary, pinnate; pinnae lunate or fan- 

 shaped, crenate, or toothed, somewhat fleshy. Fertile branch 

 bearing rows of spore cases on the edges of a pinnate rachis. 



Not common. Dry mountainous pastures. (B) P. 6. Neilston Pad; hills 

 above Gourock near the tower; Largs ; Bute; Cumbrae and Arran. 



