3 2 7 
wanting ; leaves of female stems passing gradually into the bracts ; 
innermost bracts similar to the leaves but broader and irregularly 
sinuate on the margins ; bracteoles 1 or 2 in number or wanting, 
ovate to ligulate, entire; perianth obovate and gradually narrowed 
to a contracted, minutely crenulate mouth, obtusely 4 to 5 keeled in 
upper part, 1 cell thick except in basal fourth ; archegonia about 6 ; 
male bracts mostly in 2 to 5 pairs, similar to the leaves but a little 
smaller and more concave, sometimes bearing a small bluntly 
pointed tooth near the antical base ; antheridia borne singly or in 
pairs on short stalks ; capsule spherical, purple, borne on a short 
stalk and tearing the perianth irregularly on emerging; spores 
minutely verruculose, brownish red: elaters bispiral, bluntly pointed. 
Stems 0-35 mm. in diameter, robust leaves 06 x 0-8 mm., leaf-cells 
at edge of leaf 32 ^. in diameter, in the middle 35 /x., and at base 
55 x 35 innermost female bracts 1 x 1*4 mm., perianth 1-7 '< 1 
mm., spores 10 in diameter. 
From Hepaticse in Northern Alaska, by A. W. Evans. 
Varieties of Aplozia riparia ( Tayl.) Dum. 
Aplozia riparia var. potamophila Bernet. “ Plant robust, half 
buried in the sand at the side of streams. Stems 2—3 cm. long. 
Leaves of a dirty green, opaque, often crowded, oval, subvertical, 
concave, the lower ones often spreading. Cells hexagonal, opaque. 
Perianth oblong, contracted at the base and at the apex, the upper 
half plicate with 5 plicae, one being anterior, one on each side, and 
two small ones on the posterior face, divided at the mouth into as 
many triangular teeth. Involucral bracts subvertical. Pedicel 
1*5 cm. long. Capsule small. Male plants distinct, with 10—12 
pairs of oval bracts, saccate at base. Fruit in April, May.” Bernet 
in Cat. des Hep. du Sud-Ouest de la Suisse, p. 58 (1888). This 
variety is larger than the type and bears some resemblance to 
A. cordifolia. I have seen it from a few subalpine localities in 
Scotland. 
Aplozia riparia var. rivularis Bernet. “ Rarely lertile. Aquatic 
plant presenting at first sight the appearance of Chiloscyplius 
polyanthos, but differing in its cell structure and absence of under¬ 
leaves. Cell structure laxer and more delicate, hyaline. Cells at 
the base twice as large and diminishing gradually in size as the 
margin is approached.” Bernet loc. cit p. 59. This variety is not, 
I think, rare with us. S.M.M. 
