18 EXGLTSH BOTANY. 



districts. With the exception of a station at Dunkerry beacon, south 

 Somerset, it does not occur in the south of England, but from Car- 

 digan, Brecon, Montgomery, Denbigh, Chester, Derby, and York, it 

 is found northwards, as far as Orkney and Shetland. It occurs 

 from north to south of Ireland. 



England, Scotland, Ireland. Perennial. Summer. 



Stem very tough, wiry, often partially buried, 9 inches to 2 feet 

 long, round, whitish, with minute scale-like leaves. Branches § to 

 5 inches high, produced at intervals ; but each branch is so repeatedly 

 divided that it looks like a little shrub. The barren branches, from 

 the mode in which the leaves are inserted, appear flattened, convex 

 above and concave beneath, with a ridge formed by the line of lower 

 leaves. The leaves have some resemblance to those of the Savin, and 

 are coriaceous, -^o 1° i i ncn long, rather pale dull green above, still 

 paler and glaucous beneath. Ultimate branchlets ^ to 2 inches long. 

 Fertile branchlets 1 to 3 inches high, repeatedly dichotomous like the 

 sterile ones, so that the spikes are produced in level-topped fascicles, 

 containing commonly some multiple of four, such as 8 or 16 spikes. 

 Spikes £ to § inch long, a little thicker than the branches which 

 support them. Scales at first olive and adpressed, afterwards yel- 

 lowish-brown and spreading. Sporangia reniform, opening to the 

 base. 



Savin-leaved Club-moss. 



EXCLUDED SPECIES. 



LYCOPODIUM COMPLANATUM. Linn. 



Beported from near Bramshot, Hants, and from Worcestershire, 

 but requires confirmation. Under L. complanatum are included two 

 plants — L. anceps, Wallroth, to which many authors confine the name 

 of complanatum ; the other L. Chaimecyparissus, A. Braun. Both 

 these grow in Belgium and Scandinavia, and L. Chamaacyparissus in 

 France. It is by no means unlikely to occur in Britain, especially as 

 L. alpinum is not recorded from either of the supposed stations for 

 L. complanatum. The barren branches of the two are so similar, 

 that they can scarcely be distinguished ; but in L. complanatum 

 the spikes, 2 to 6 in number, are borne on a long peduncle, as in 

 L. clavatum. Dr. Milde thinks it not improbable that L. alpinum 

 may be merely a form of L. complanatum. 



