6 Leaves 4-ranked, nearly uniform. 
9. L. tristachyum Pursh. 
Lycopodium tristachyum Pursh, 1814. Fl. 2: 653. 
Underw. in Britt. Man. 1037. 
L. chamaecypartssus A. Braun, 1843. in Doell, 
Rhein. Fl. 36. Underw. Nat. Ferns 136. 
£. complanat. chamaecyparissus Eaton, in Gray 
Man. 697. Underw. in Ill. Fl. 1: 43. 
Plants similar to the preceding species from which it 
differs by its narrower branches and its nearly uniform 
leaves. The rootstocks of this species are 2 dm or longer 
and are found at a depth of 2 cm. or more. 
In woods. [On hie h mountain san 
Wireinia, near Sweet Springs” Purshl.c. 
I have observed this species on dry slopes in the region 
_ occupied by Pinus virginiana. It is abundant on the 
mountain side at Clifton Forge, Va., with P. pungens. 
28, SELAGINELLA Beauv. 1805. 
Small moss-like plants with numerous, branching 
stems. Leaves mostly minute, scale-like, 4-many-ranked. 
Sporangia axillary. 
| Leaves appressed. 
1. S. rupestris (L.) Spring. 
Muscus terrestris repens Virginianus &c. Morts. 
lish O24 sectst 5 .t.)5.16 04. 
Lycopodium rupestre Li. Sp. Pl. 1101. 
62 
