MONOECIA.— MONADELFHIA. 3oy 



ilAB. In water. July. ty. Root thick, creeping ; 

 leav.acum. ; spaih. oval, -white inside. 



MOXADELPH1A. 



564 PINUS. Pine. Conifers. 



* Leaves solitary, distinct at the base, abies. 



1. P. baisamea: leav s solidary flit, emarginate or en- 

 tire, glaucous bene.sth, somewhat pr-ctinate, re- 

 curved-spreading. sub-erect above ; cones cylin 

 dric, erect ; bracts abbreviate, obovate, conspi- 

 cuously mucronate, subsen nlate. 



HAB. Mountains. A small tree; leav. C — 10 lin. 

 long, dense ; scales of the cones ihin, 



3. Fraseri : leaves short, emarginate, subsecund, 

 erect ai>ove ; cones ovate-oblong ; bracts elon- 

 gated, incisely denticulate. 



HAB. High mountains. Smaller than the preced. : 

 leaves shorter ; cones small. 

 !. P. canadensis : le »ves Solitary, flat, denticulate, 

 nearly in two rows ; cones ovate, terminal, scarce- 

 ly longer than the leaves. 



HAB. Kocky woods and mountains. A large tree; 

 branch, and leav. horizont. ; leav. lin., obtuse. 

 '). P. nigra: leaves solitary, quadrangular, erect, 

 straight ; cones ovate ; scales, elliptical, undulate 

 on the margin, erect, summit denticulate. 



HAB. Mountain swamps. A middle sized tree; 

 leav. dense, dark green ; cones 1 — 2 in. long. 

 4. P. rubra: leaves solitary, subulate ; cones oblong, 

 obtuse ; scales rounded, soaiewbat 2-lobed, en- 

 tire on the margin. 



HAB Maine. 

 ». P. alba: leaves solitary, quadrangular, incurved; 

 cones subcyhndrical, loose j scales ohovate, very- 

 entire. 



HAB Mountain swamps. A small tree ; leav. pale 

 green, not crowded. 



* * leaves 2 — 5, in a short cylindrical sheath. vinv€, 



•?. P. inops : leave? by pairs, short ; cones recurved. 

 iih 2 



