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 

 13 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. S. douglasii. 

 Leaves all alike, many-ranked. 



Stems slender, elongate; leaves loosely imbricated. S. struthioloides. 



Stems short; leaves closely imbricated. S. 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. 



