416 ON THE VARIETIES OF BRITISH FERNS, ETC, 
from half an inch to two inches : they are of a brighter colour than the other 
species, all in fruit; several of them appear to have formed small thick tufts, 
about one inch in height and diameter. Pursh mentions that the American 
plant is smaller than the British. 
The leaves are ovato-lanceolate, ciliato-denticulate. 
The scales larger, broader, deeply toothed, spinulose. 
Lycopodium Alpinum. 
Hook., Brit. Flo., Edit. 3, p. 457; Edit. 4, p. 392. 
Francis’ Ferns, p. 60, pi. 5, fig. 5. 
With. (MacGilliv.), p. 387. 
Branches fasciculate, flat at the top. 
Leaves in four rows, convex, oblong-acute, entire. 
Scales in four rows, acute, broad at the base, sometimes -with 2—3 teeth. 
Lycopodium selago. 
Hook., Brit. Flo., Edit. 3, p. 457; Edit. 4, p. 392. 
Francis’ Ferns, p. 61, pi. 5, fig. 6. 
With. (MacGilliv.), p. 387. 
This species may be known at first sight by its upright habit, and glaucous 
colour; it grows from 2—6 inches high, is branched dichotomously, flat at the 
top: the leaves are narrow, lanceolate, acute, arranged in eight rows, and the 
fruit is borne in their axils, on the upper half of the branches. 
It is also sometimes viviparous, producing 54 curious petioled buds, which consist 
of three or four differently-sized ovate leaves; they are irregularly placed in the 
axils of the common leaves, that is, in the place of the capsules.”* 
This state of the plant I have never seen. 
Marsileacea:. 
Isoetes lacustris. 
Hook., Brit. Flo., Edit. 3, p. 458; Edit. 4, p. 392. 
Francis’ Ferns, p. 56, pi. 4, fig. 11. 
I introduce this to mention the two varieties found by Mr. Wilson, in Wales, 
namely,—one with densely-tufted, erect, slender leaves; the other, solitary, with 
broader leaves, widely spreading. 
Sir W. J. Hooker asks,— 44 May not the former be the setacea of Bose V 
Francis’ Analysis , p. 61. 
