LYCOPODIACEAE. 43 
Division PTERIDOPHYTA. ‘Fernworts. 
Family LYCOPODIACEAE. Clubmoss Family. 
A small family of small herbaceous plants of little use. 
Wild species are gathered for Christmas decorations; a few 
are grown in plant houses; and the following are sometimes 
used for ground-covers in shady places. 
Lycoroptum. Club Moss. Ground Pine. 
Low often creeping evergreen flowerless herbs with over- 
lapping I-nerved small leaves; and microscopic spores of one 
sort in axillary small or spiked sporangia. 
1. Leaves 4-ranked on fan-like branches, L. complanatum. 
Leaves alternate, not on fan-like branches. 2. 
2. Spore-cases not in spikes. L. lucidulum. 
Spore-cases in terminal spikes. 3. 
3. Spikes nearly sessile: plants tree-shaped. L. obscurum, 
Spikes long-stalked, usually paired. L. clavatum. 
Family SELAGINELLACEAE. 
A small family, mainly of the tropics, of similar use to the 
Lycopodiaceae, 
SELAGINELLA, 
Small evergreen flowerless herbs with small 4- or 6-ranked 
I-nerved leaves and small scores of two kinds (megalospores 
visible to the naked eye, and much smaller microspores) in small 
axillary oi spiked sporangia. 
Upper and lower leaves smaller than the lateral. S. ‘apust 
