14 LYCOPODIACEAE. 



smaller and closely appressed; fruiting branches with leaves like the sterile, 

 each bearing 1-3 spikes. 



Known in our limits only from a station 23 miles northeast of Snoqualmie, 

 Washington, L. A. Nelson. 



Lycopodium complanatum L. Stems widely creeping, with suberect 

 irregularly forked fan-like flattened branches; leaves 4-ranked, very small, 

 closely appressed, the lateral with spreading tips, the dorsal and ventral smaller, 

 wholly appressed; fruiting branches with much reduced leaves, each bearing 

 1-3 cylindric spikes. 



Not definitely known in our limits but abundant at Lake Keechelus near 

 the summit of the Cascade Mountains. 



Lycopodium clavatum L. Running-pine. Stems prostrate, creeping, 

 often very long; sterile branches similar but ascending; leaves pale green, awl- 

 shaped, bristle-tipped; fertile branches with minute leaves, erect, bearing 2-4 

 fruiting cones. 



In woods, not common. 



Lycopodium annotinum L. Stems creeping, often 1 m. long; leaves dark 

 green, linear-lanceolate, spreading, minutely serrate; fruiting cones solitary, 

 sessile at the tips of ordinary branches. 



In mountain woods, not common. 



Lycopodium sitchense Rupr. Stems creeping, often half-buried, with 

 erect forked branches, 5-7 cm. high; leaves lanceolate, acute, 5 mm. long, 5- 

 ranked; fruiting cones on very short nearly naked penducles. 



Common in wet meadows at 1200-1800 m. altitude. 



Family 6. SELAGINELLACEAE. 



Terrestrial, annual or perennial moss-like plants with branching 

 stems and scale-like leaves, which are many-ranked and uniform, 

 or four-ranked and of two kinds spreading in two planes ; sporangia 

 1 -celled, solitary in the axils of leaves which are so arranged as to 

 form more or less quadrangular spikes; spores of two kinds, some 

 sporangia (megasporangia) containing four megaspores, others 

 (microsporangia) containing numerous microspores. 



21. SELAGINELLA. 



Sporangia solitary in the axils of leaves forming terminal cone- 

 like spikes; sporangia minute, subglobose, opening transversely; 

 megaspores globose, four in each megasporangium ; microspores 

 small, numerous. 



Leaves of two sorts, 4-ranked. 

 Leaves all alike, many-ranked. 



Stems slender, elongate; leaves loosely imbricated. 5. struihioloid.es. 



Stems short; leaves closely imbricated. 5. rupestris. 



Selaginella douglasii (Hook.) Spring. Stems reclining, 10-40 cm. long, 

 pinnately branched; lateral leaves oval, oblique, obtuse, 2 mm. long; upper 

 leaves half as long, oval, cuspidate, acuminate. 



On wet rocks, local; abundant in the Cascade gorge of the Columbia River. 



