Flora of the Palonse Region 



Class 3. LYCOPODINEAE. 



Plant moss-like: stems branched, solid, with numerous small 

 leaves: sporangia solitary in the axils of the leaves or on their 

 upper surfaces. 



Order 6. SELAGINELLEAE. 



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: spor- 

 angia one-celled, in the axils of leaves which are so arranged as to 

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

 sporangia (macrosporangia) containing four macrospores, others 

 (microsporangia) containing numerous microspores. 



Family 6. SELAGINEEEACEAE. 

 Characters of the Order. 



11. SELAGINELLA. 



Sporangia in the axils of leaves forming terminal cone-like 

 spikes; sporangia minute, subglobose, opening transversely; mac- 

 rospores globose, four in each macrosporangium; microspores 

 small, numerous. 



S. rupestris Spreng. Stems densely tufted, 5-10 cm. long, prostrate or 

 ascending, much branched: leaves closely imbricate, narrowly lanceolate, 

 ciliate margined, channeled on the back, tipped with a slender white awn: 

 spikes quadrangular 1-1. 5 cm. long; bracts like the leaves but the awns 

 shorter and the margin more ciliate. 



Abundant on the basaltic bluffs of Snake River. Our form has shorter 

 branches and more densely crowded leaves than is typical and has been 

 named S. densa Rvdberg. 



