SELAGINELLACE&. \\\ 



much branched; leaves loosely imbricate, scarcely i" long, 

 linear-lanceolate, convex and grooved on the back, acute, 

 sparsely spinulose-denticulate, not bristle-tipped ; spikes quad- 

 rangular, very slender ; macrosporangia scarce. Port Orford, 

 Oregon (Kant 2); Tilamook Valley, Oregon (Hmvell); probably 

 in Northern California. 



2. STACHYGYNANDRUM Baker. Stem leaves of two kinds, 

 spreading in two planes, those of the upper plane smaller and 

 more ascending ; bracts uniform. 



* Main stems decumbent ; root fibres extending to upper nodes. 

 t Stems persistent ; leaves rigid, firm in texture. 



4. S. Douglasii (H. & G.) Spring. Stems 3' 12' long; 

 branches 2' 6' long, bi tripinnately divided ; leaves of lower 

 plane i" long, obliquely oval, obtuse, faintly nerved; leaves of 

 upper plane half as long, oval, incurved, ending in a short 

 point, both sparingly ciliate at base ; spikes 6" 12" long, quad- 

 rangular, terminal ; bracts deltoid-cuspidate, strongly imbri- 

 cate. (Lycopodhun Douglasii H. & G., L. ovalifolium H. & G.) 

 Northern California to British Columbia. 



ft Stems mostly annual, fugacious ; leaves mostly membranous, 

 flaccid. 



5. S. apus (L.) Spring. Stems i' 4' long, slender, angled on 

 the face, prostrate, creeping, much-branched, flaccid ; leaves of 

 the lower plane spreading above, the lower reflexed, ovate, acute, 

 serrulate, not distinctly ciliate ; leaves of the upper plane ovate, 

 shortly cuspidate; spikes 3" 6" long; bracts ovate, acute, 

 membranous, strongly serrulate, acutely keeled in the upper 

 half. Canada and New England to Rocky Mountains, and 

 southward to Florida and Texas. 



6. S. Ludoviciana A. Br. Stems slender, copiously pin- 

 nate, flat both sides, 4' 6' long, lower branches slightly com- 

 pound ; leaves of lower plane rather distant except at tips of 

 branches, spreading, ovate-oblong, sub-acute, firmer in texture 

 than in preceding, serrulate, not distinctly ciliate ; leaves of 

 upper plane half as long, obliquely oblong, cuspidate ; spikes 

 3'' 6" long ; bracts ovate-lanceolate, strongly keeled. (S. 

 apus, var. denticulata Spring, where it may belong, the differ- 

 ences possibly due to climatic conditions.) Covington, Louisi- 



