SPECIES OF MOSSES OF THE GENUS FISSTDENS. 555 



only halfway ; limb very narrow or almost obsolete on the 

 vertical lamina ; capsule oval or oblong; male flowers bud-like, 

 very minute. — Sussex. The Botanic Gardens, Dublin ; sent by 

 Dr. Moore as F. exilis, Wils. Canada, Prof. Macoun. Distri- 

 buted by Drurnmond as F. bryoides, Muse. Atner. 113. 



Long mistaken as a strange form of Wilson's F. viridulus, 

 the minute axillary flowers having been overlooked. The keel of 

 the horizontal lamina being often without the wing of the vertical, 

 the steins have a different look from all the other small species. 



5. F. exilis, Hedw., Schw. Sup. t. 38. — Skitophyllum exile, 

 Be la Pylaie, Desv. Journ. de Bot. t. 38. f. 1. — Bryum viridulum, 

 Dicks, ex ipso ! — Fissidens viridulus, Wils. Bry. Brit., so far as 

 relates to the erect fruiting forms. — F. Lylei and the F. pusillus, 

 Braithw. Brit. Moss-Fl. t. x. D. a. — F. holomitrius, Spruce, 

 Trimen's Journ. Bot. 1880, p. 356. — F. sepincola, Mitt, in lit. 



Common on hedge-banks in Britain, fruiting in winter : minute 

 states on stones and rocks in shade, fruit in summer ; and some 

 of these may prove different. 



Variable in size; and sometimes the least of the European 

 species. When growing, the capsules are erect, the limb is very 

 variable, and the lamina on the horizontal portion on the upper 

 side is unequal. The calyptra is entire, borne on the point of 

 the lid, or it is split on one side ; and the difference seems to be 

 an accident of growth. 



6. F. viridulus (Dicranum viridulus, Sw.). — F. bryoides, 

 Hedw. Muse. Frond, iii. t. xxix. 



Leaves less lanceolate than in F. bryoides, wider near the point, 

 as observed by Wilson, who found a specimen from Swartz in 

 Smith's herbarium, and supposed it to be a state of his F. viri- 

 dulus. Areolation of larger and more pellucid cells. Fruit- 

 stalk reddish ; annulus of a double row of cells adherent. Ca- 

 lyptra split or entire. F. Sardagnai, Venturi, Eev. Bry., 1883, 

 p. 93, from Cagliari, may, from description, belong here ; but it 

 is said to have the leaves straight when dry. F. introlimbatus, 

 Euthe, Hedwigia, 1870, p. 177, redescribed by Schimper as F. 

 algarvicus, C. de Solms ; but there are no specimens so named in 

 his herbarium ; also F. subimmarginatus, Philibert, Eev. Bry. 

 1884, p. 57, from description, which is very exact, almost enabling 

 a reconstruction to be made, seems to point to this species, which, 

 having been overlooked and omitted in recent text-books, would 



LINK. JOURN. — BOTANY, VOL. XXI. 2 S 



