ANTHOGEROS. 499 



1. Anthoceros laevis, L. 



Anthoceros kcvis, Linn. Sp. pi. 1 (!()G (17");3). 



Dioicous, CcTespitose, small to medium size, dark green. Fronds 

 flat, smooth, without air-cavities ; lobate, lobes undulate, some- 

 what orbicular, rounded, not laciniate ; texture somewhat fleshy, 

 epidermic cells 4 times smaller than the inner, 3 to 4 cells thick 

 near the middle of the frond ; radiculose, rootlets numerous, pale 

 dirty brown. Calyptra trumpet-shaped, 1 to 2 cells thick near 

 the middle, 3 to 4 near the base, mouth wide, repand, toothed, 

 rarely scariose. Capsule brown, dark brown to black when dry ; 

 spores yellowish-brown, flatfish, angular, almost smooth ; elaters 

 rather short, geniculate, somewhat articulated. Andr^ecia irre- 

 gularly dispersed over the face of the frond, oval; antheridia 

 oval, pale green, slightly stipitate, about 6 in each cavity. 



Dimensions. — Fronds J to J inch long and broad, '2 mm. to 

 *3 mm. thick ; calyptra 3* mm. long x 1- mm. broad, 2* mm. x 

 1" mm.; capsule f to 1 inch long; spores -05 mm. diam. ; 

 androecia "3 mm. x '2 mm. 



Hab. — Wet fields, damp roadsides, by the sides of ditches, &c. 

 Rare. 



1. Stable Hobba, near Trereiff*e, Newlyn CUft; Trungle, Paul, 

 Jr. C/fr//o/r. 3?, 5, 7?, 10, 12. In a cultivated field near Hever- 

 sham Railway Station ; cultivated fields (sand and sandy-peat), 

 Nether Levens and Foulshaw, Westmorland, G. Sfnhler. 

 17a. Caithness, Rev. B. LiUie. 



I. On a wet clay bank by the roadside, leading from Dingle 

 to Ventry, left-hand side of the road about a mile and a half from 

 Ventry, Lliidb. &f Moore, 1873. On a pathway in Burnham 

 Wood, Ventry, Left §• McArdlc, 1898. 



Found on the Continent and in North America. 



Obs. — Distinguished from At/f//ocero-'> jjHricfat/f.s by its dioicous 

 inflorescence, the smooth surface of fronds, no air-cavities, lobes 

 rounded not laciniate, paler colour of the spores, which are not 

 echinate. 



