40 LYCOPODIACEAE. 



Sporanges borne in the axils of leaves which are similar to those of the stem. 

 Sporanges mostly wanting in the axils of the upper, mostly 8-ranked leaves. 



Stems erect, rigid; leaves uniform, ascending. i. L. Selago. 



Stems somewhat lax, spreading; leaves spreading or deflexed, alternately longer and" 



shorter. 2. L. lucidulum. 



Sporanges only in the axils of the upper leaves forming terminal spikes; leaves many-ranked. 

 Plant small; leaves acute, soft, mostly entire. 3. L. inundatum. 



Plant stout; leaves narrow, spinulose-pointed, bristle-toothed below the middle. 



4. L. alopecuroides. 

 Sporanges borne in the axils of yellowish ovate or cordate scale-like leaves, which are very unlike 



those of the sterile stems. 



Stems leafy up to the base of the spike or nearly so. 

 Spikes erect, closely sessile. 



Stems erect, tree-like. 5. L. obscurum. 



Stems creeping with ascending branches. 



Leaves uniform, spreading, 5-ranked. 6. L. annotinum. 



Leaves of 2 forms, erect-imbricate. 4-ranked. 7. L. alpinum. 



Spikes erect, short-peduncled; leaves small, appressed, 4-ranked. 8. L. sabinaefolium. 

 Fertile branches with minute leaves so that the spikes appear long-peduncled. 



Leaves uniform, many-ranked; stems terete. 9. L. clavatum. 



Leaves of 2 forms, few-ranked; stems flattened. 



Sterile stems entirely creeping; spikes solitary. 10. L. Carolinianum. 



Sterile stems with fan-like ascending branches; spikes clustered. 



ii. L. complanatum. 



i. Lycopodium Selago L. Fir Club-moss. (Fig. 88.) 



Lycopodium Selago L. Sp. PI. 1102. 1753. 



i 



Stems '3 '-6' high, thick, rigid, erect, 2-5 times- 

 forked, the branches fastigiate, forming a level- 

 topped cluster. Leaves crowded, uniform, ascend- 

 ing, elongated-lanceolate, mucronulate, entire or 

 spinulose-denticulate, nerved below, convex above, 

 the upper mostly 8-ranked, sterile, those below 

 bearing the small sporanges in their axils, those of 

 the lower half of the stem again sterile ; plant 

 propagated also by bud-like organs which have 

 a lower pointed bract and 2 or 3 upper fleshy and 

 obovate ones. 



On rocks, Labrador and Greenland to Alaska, south 

 to the mountains of Maine, Xew Hampshire, Vermont 

 and northern Xew York, on the summits of the higher 

 Alleghenies to North Carolina, and to Michigan and 

 Washington. Also in Europe and Asia. Autumn. 



2. Lycopodium lucidulum Michx. Shining 

 Club-moss. (Fig. 89.) 



Lycopodium lucidulum Michx. Fl. Bor. Am. 2: 284. 1803. 



Stems somewhat lax, ascending or spreading, thick, 

 2-3 times forked, the branches 6'-i2' high. Leaves 

 widely spreading or reflexed, dark green, shining, i- 

 nerved, acute, minutely toothed, a series of longer ones 

 alternating with a series of shorter, the latter more fre- 

 quently bearing the sporanges at a short distance below 

 the summit of the stem ; sporanges of preceding years 

 flen persistent ; plant also propagated like the preced- 

 ing species by gemmae, which fall to the ground and 

 become new plants. 



. W T' K N V vf "ndland to British Columbia. 

 ra ^ ^^^ to " 7 ft " 



