ii8 REPORT OF NEW JERSEY STATE MUSEUM. 



Key to the Plants of Southern New 

 Jersey. 



No flowers; reproduction by spores (ferns and their allies). 



b. Sporanges (spore cases) born under the scales of a terminal cone- 

 like spike. Stems conspicuously jointed, the modes covered by 

 toothed sheaths. Bquisetacecs, p. 137 



bb. Sporanges born in the axils of the crowded lanceolate or subulate 

 leaves or of reduced scale-like leaves which form an erect spike. 

 Plants somewhat moss-like, often branched and trailing. 



Lycopodiales, p. 139 



bbb. Sporanges born at the base of slender, awl-shaped, rush-like leaves, 



which grow in a tuft from a round fleshy base rooting in the mud. 



Plants submerged. Isoetaceee, p. 144 



bbbb. Sporanges born on the back of a leaf (Jrond) in round, elongated 



or marginal patches (sori) ; or in a spike or cluster on the modified 



terminal (or middle) portion of the frond, or on a separate stalk 



(really a modified frond). Filicales, p. 119 



True flowers present; containing stamens, pistils or both; reproduction 



by seeds. 



6. Trees with linear or scale-like evergreen [except Taxodium] leaves; 



a resinous odor, fruit, a cone or a woody or fleshy berry. 



Pinacecs, p. 146 

 bb. Not evergreen coniferous trees. 



c. Parts of the flower usually in threes or sixes, leaves mostly 

 parallel-veined. Embryo with a single cotyledon ; early leaves 

 never opposite. Stem not divided into bark, wood and pith. 



Monocotyledons, p. 153 



cc. Parts of the flower mostly in fours and fives, leaves net-veined. 



Embryo with a pair of opposite cotyledons. Stem divided into 



bark, wood and pith, the wood in perennial species, growing by 



annual layers just under the bark. Dicotyledons, p. 380 



