Species of Lycopodium of North America 151 



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having the leaves spreading or somewhat reflexed, with the alterna- 

 tion of long leaves and short sporophylls. Leaves not hollow at 

 the base but flat as in L. lucidtdum. 



Of very limited range so far as known at present, and con- 

 fined apparently to sandstone rocks. The plant varies no more 

 than L. lucidulum, both differing in this respect from L. Selago. 



Indiana: Fern, Putnam Co., Oct., 1891,'* L. M. Underwood 

 (U): type. 



Wisconsin: Dells of the Wisconsin, Aug. 19, 1893, L. M. 



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Underwood (U). 



Kentucky: Mountains, Warren Co., "on the face of sand- 



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Green River, Warren 



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Alabama : Winston Co. " under projecting sandstone rocks 

 near Sipsey River," i June, 1896, L. M. Underwood (U). This 

 plant differs slightly from the other and more northerly ones 

 in having narrower sporangia. 



3. L. lucidulum Michx. Fl. Bor. Am. 2 : 284. 1803 



Prostate portion of stems longer (5-15 cm.), frequently root- 

 ing, curving upward and dichotomously branching 1-3 times to 

 form a loose cluster (10-20 cm. high) of a few densely leafy ver- 

 tical stems, or the stems occasionally occur single : leaves re- 

 flexed (8-1 1 mm. x 1.5-2 mm.), linear-obovate, broadest above 

 the middle, from which point they gradually taper to the 1 mm. 

 wide base ; margin erose denticulate above the middle, acute : 

 sporophylls 3.5-8.5 mm. x 1.2-1.5 mm., linear, acute, entire or 

 sometimes slightly denticulate : sporangia depressed reniform : 

 plant often gemmiparous. 



The rhythmic production of sporangia and the resulting alter- 

 nation of long leaves and short sporophylls gives the foliage a 

 wavy outline quite characteristic of .this plant, with its shining 

 dark green leaves. 



Habitat in forests, more commonly in low ground. 



Distribution : Newfoundland, Prince Edward Island, New . 

 Brunswick. Maine. New Hamnshire. Vermont. Ontario, Massachu- 



* At the Indiana station this species grows with Z. lucidulum, the latter always 

 in the low swampy ground bordering the small streams, while this species grows along 

 the narrow ledges of the overhanging sandstone rocks. The range of Z. luddulum 

 also includes the other stations. 



