PLiANTS OF SOUTHERN NEW JERSEY. 139 



North and Middle districts, usually appearing as if introduced. 



Spores Mature.— hate May to late July, occasionally later in 

 the summer. Undeveloped spikes persist throughout the year. 

 Evergreen. 



Middle District.— KeypoTt (C), Farmingdale (S), New Egypt, Delanco, 

 Birmingham (C), Vincentown (C), Camden (P), Medford (S), Westville 

 (KB), Woodstown (H). 



Order LYCOPODIALES. 



Includes the Club Mosses, Selaginellas and Quillworts. The 

 last are mainly confined to the Delaware River and its im- 

 mediate- tributaries. Of the Club Mosses two species are charac- 

 teristic of the Pine Barren bogs and found in practically all 

 such situations in the district, while one other species is almost 

 restricted to the Pines — L. carolinianum. 



The other seven are for the most part intrusions from the 

 north, only one of which occurs (sporadically) in the Pine 

 Barren district. Our only Selaginella occurs in the Middle and 

 Coast districts only. 



Fruiting Data. — As in the ferns. 



Key to the Species. 



a. Erect submerged plants consisting of a cluster' of awl-shaped leaves 



arising from a fleshy bulb-like base. Sporangia concealed at the base of 



the leaves. Isoetes, p. 144 



aa. Small prostrate or assurgent moss-like plants, with sporanges at the 



axils of minute flat spreading leaves. Selaginella apus, p. 143 



aaa. Larger prostrate or erect plants with sporanges in the axils of the leaves 



in erect cylindrical spikes. 



b. Plants normally erect, leaves all alike. Lycopodium lucidulum, p. 140 



hb. Stems trailing, sending up erect branches, leaves all alike but top of 



spike, where the sporangia are born somewhat stouter. 



c. Stems densely leafy, 15 mm. or terminal part 20 mm. in diameter. 



L. alopecuroides, p. 141 

 cc. Stems more slender. 



d. .2 — I dtTL high, central stem slender throughout. 



L. inundatum, p. 140 



dd. 2.5-3 dm- high, decidedly more robust, central stem thicker 



terminally. L. chapmanU, p. 141 



0000. Larger prostrate or erect plants with sporangia in the axils, of modified, 



yellowish, scale-like leaves which form a distinct slender cone-like spike. 



b. Whole plant upright, branching. L. obscurum, p. 142 



