12 BEITISH HEPATICiE. 



Hab. Discovered by my late friend Mr. G. K Hunt on Ben-mac-dhui ! and by 

 Locb Kandor, July, 1868 ! Lough Bray, Ireland, July, 1873, Dr. Lindberg ! Found 

 also in Greenland, Giesecke 1 Shafto, Hetzius ! Styrian Alps, Lindenberg. Switzer- 

 land, Jack ! Dr. Lindberg sends it from Eatavuori, Finland, where it was collected 

 in fruit July, 1871, by Dr. J. P. Norrlin. In America it occurs on the Catskill 

 Mountains, Gkve 1 and Alleghanies, Sullivomt ! 



Forming extensive livid tufts on the borders of alpine streams. 



Stems (PI. II. fig. 5, 1) stoloniferous at the base, erect, rather 

 tender and flexuose, pale-brown. Shoots 1" to 3" in height, by a line 

 in diameter, simple, but appearing branched from the growth of 

 innovations, which are frequent from the apex of annual shoots, 

 especially from old involucra, at other times axillary. Stolons 

 extensively creeping, naked, or beset here and there with fascicles 

 of rootlets ; at length ascending, and forming new shoots. Rootlets 

 rare on the erect shoots ; in the specimens from Loch Kandor of a 

 purple colour. 



Leaves smaller, and often defective at the base of shoots, more 

 crowded near the apex, but generally rather distant (fig. 5, 2), and 

 of nearly equal size, very concave, vertically patent from an erect 

 somewhat contracted sheathing base. Form obovate (5, f. 3, 4) to 

 obcordate,bilobed, lobes equal, ovate-obtuse, sinus narrow, sometimes 

 reflexed, equal to about ^th of the length of the leaf. Margm plane, 

 sometimes undulate, inflexed (not reflexed) at the base. 



Texture thin and tender, not at all shining, shrinking and crisped 

 when dry. Colour pale pellucid olive when moist, apex brownish- 

 purple or sphacelate. Cells with better defined thinner walls than 

 in the following species. Those of the margin (f. 5, 5) quadrangular, 

 smaller, ttVo" iii diameter. Cells of the upper third of the leaf 

 hexagonal, with a double outline (f. 5, 5 b), y-iVo " ^1 T^oo"* Those 

 of the base oval or oblong, y^" to -5^" by -nVe "• Trigones distinct 

 at the angles, -jeVr " i^ diameter. 



Dioicous. Fertile stem incrassate at the apex. Involucral leaves 

 (f. 5, 6) larger than the rest, patent, cordate, deeply and less obtusely 

 lobed, sometimes with a smaller ventral lobe, margin repand. Invo- 

 lucre a line in length, urceolate-oblong, formed of two convolute 

 leaves scarcely differing from the involucral leaves in form, as may 

 be seen by compressing a specimen laterally (f. 5, 7) ; connate only 

 at the lower third; lobes more acute, erect, or a little patent, 

 inflexed. 



Colesule (f. 5, 7) adnate with the walls of the hollow receptacle, 

 the apex only free, divided into 4 or 5 broad acute segments. It 

 is much shorter than the involucre, and confined to its lower third, 

 the lobes rising far above it, and hiding it from view. 



Calyptra campanulate, bearing at the apex an unusually long 

 style (f. 6, 8). Abortive pistilltdia resembling those of Scalius 

 FEookeri in their length and slenderness, attached to the walls of 



