468 LYCOPODIACE^l. 



vessels ; or stemless plants, with erect subulate leaves and a 

 solid corm. 



1. LYCOPODIUM. Linn. Club Moss. 



(From the Greek At>w, a wolf, and :rov?, n-ojoj, afoot ; on account of a supposed 

 resemblance in the appearance of some species.) 



Spore-cases all of one kind, 1 -celled, reniform, somewhat 

 didymous, opening transversely at the apex or rarely at the 



* Spore-cases in spikes. 

 f Spikes pedunculate. 



1. L. davatum Linn. : stem creeping, with ascending branches ; leaves 

 scattered, numerous, subulate-linear, incurved and hair-pointed; spikes 

 mostly in pairs, cylindric, pedunculate ; scales ovate, acuminate, erosely 

 denticulate. L. tristachyum Pursk. ? L. integrifolium Goldie. 



Dry woods. Can. to Del. W. to Mich. July. Ij.. Stem closely trailing 

 on the ground, several feet long, rooting and throwing up fertile branches 2 6 

 inches long. Leaves 3 4 lines long, light green, entire or minutely denticulate. 

 Spikes usually in pairs, sometimes 1, rarely 3 or 4, yellowish, erect. Peduncles 

 25 inches long. Common Club-moss. 



2. L. complanatum Linn. : stem trailing ; branches erect or ascending, 

 dichotomously and pedately subdivided, with the branchlets flattened and 

 spreading ; leaves 4-rowed, the marginal ones connate and diverging at the 

 apex, the middle rows distinct and appressed ; spikes 2 4, cylindric, on a 

 long common peduncle. 



Woods and thickets. Arct. Amer. to Car. ; common. July. 1J.. Stem 28 

 feet long, procumbent or sometimes shorter and nearly erect, variously branched. 

 Leaves short, 4-rowed, those on each margin broad at the base and somewhat 

 spreading, those of the middle row smaller and closely pressed to the flattened 

 sides of the stem. Spikes about an inch long. Flattened Club-moss. 



ff Spikes sessile. 



3. L. inundatum Linn. : stem prostrate, creeping ; fertile branches soli- 

 tary, erect, with a single oblong sessile and leafy spike at the extremity ; 

 leaves linear, scattered, acute, entire or sparingly denticulate, curved up- 

 wards. L. Caroiinianum Dig. 



var. afapecuroides Tucfarman : fertile branches elongated ; leaves linear- 

 subulate, sparingly ciliate-denticulate at the base. L. alopccuroides Linn. 



Swamps and wet sandy margins of ponds. Hudson's Bay to Flor. July, 

 Aug. '4-- Stem long, creeping close to the ground, yellowish-green. Fertile 

 \ranches subradical, 2 lO^inches high. Sterile branches short, flaccid. Leaves 

 varying from entire to conspicuously denticulate. Spites 6 lines to an inch or 

 nore long, leafy. Marsh Club-moss. 



4. L. annotinum Linn. : stem creeping, very branching ; branches 

 iscending, 2 3-forked, the branchlets simple; leaves in about 5 rows, 

 inear-lanceolate, mucronate, serrulate at the apex, spreading ; spike soli- 

 wary, oblong-cylindric, sessile. 



