COMTERKiE. 233 



Genus III IMNUS. 



Flowers moncec^ious. Sterile Jhirers ; scales peltate. Peri- 

 anth none. Anthers 2, eiich l-ceileci, sessile. Fertile flowers 

 in nn ovate cone. Scales c\osv\y imbricate, 2-flo\vere(l. Pis- 

 til \. .^///winged. Scales wondy. 



(a) Leases 2-5. with a sheath at the base ; scales of the cone 



thickened at the summit 



1 P Inops. a small tree, abounding in resin, with scattered, smooth 

 hrnnches. /xwrrs short, in pairs. 6^o/if oblong, conic, about the length of 

 the leaves. S«'//«'.< with siibulale .«pinef. Scrub pine. 



^i -May. i^ uuly barrens. 20-40 fi. 



2 P Variabims. a large tree, much bianciicd. Leai>e.s by pairs or threes, 

 slender and ihannclled, 4-5 in<lus long, deep green- Cone generally solita- 

 ry, ovate, 2-3 inches long. Scftlts with incurved spines. 



T^ April. Along the s*:a coast. GO-70 It. 



3 P RiGiDA. A large tree. Leaves by tlueos, 4-G inches long, with short 

 sheaths. C'o/k--! ovate, scaticred, or ini:lusLcrs, usually ihe latter, 2-4 inches 

 long. Sciilet with retle.xed si)nHS. 



1^ April— .May. Usually in the upper country. 70-100 ft. 



4 P Seroti.na. a small tree. Z^f/pe.t by threes, 6-8 inches long. Cones 

 ovale, large lor the size of the tree. Soles with straight, slender spines. 



I; April. Around pounds. 30-10 ft. 



5 P Pu.N'UE.vs. A nnddle sized tree, irregularly branched. Leaves by 

 pairs, short, acute. Cones ovate, clustered, sessile. iSpines long, subulate, 

 the lower rcilected. 



h Mountains. 40-50 ft. 



6 P T-EDA. A large tree, wiih a straight, tall trunk. Leaves long, by 

 three?, 'in long sheaths. Cones \im<i, dcnexed. i>cales armed with rigid 

 spines. This is ni'i abundant species but affords very little resin. 



h April. 80-100 ft. 



7 P Pali'stris. a large tree. Leaves by threes, very long, with the 

 sheaths pinnatitid. Co/j<s nearly cylinarical, G-10 inches long. Sca/esinu- 

 ricate. Long leaved pine. 



Tt Ai)ril. Common in sandy soils. 80-100 ft. 



8 P Strobus. a large tree. Leaves by fives, slender, in short sheaths- 

 Cones solitarv, pendulous, long. Scales loose. White pine. 



h April. -Moun'ains. ^100-140 ft. 



(6) Leaves solitary, distinct at the bn.'e. Scales of the cone even, attenuated, 



glaiirous. 



9 P Balsamea. a small tree. Leaves solitary, emarginate, flat, glaucous 

 beneath, somewhat pectinate at the suminii, nearly erect, below recurved, 

 spreading. Cone solitary, erect, cylindrical. /)V«c/i short, obovate, inucron- 

 ate, somewhat serrulate, with the margins thin and smooth. 



Bab am fir. Balm of Gilend. 

 Vl May.. Mountains. 40-50 ft. 



10 P Ca.nadr.nsis. a large or small tree, with horizontal branches. Leaves 

 solitary, flat, denticulate, in 2 rows. Cone small, ovate, terminal, scarcely 

 longer than the leaves. Htmloch. 



Vi May. Mountains. 30-100 feet. 



11 P Xii;ra. a large or small tree. Ijeaver. solitary, very numeruis, 4- 

 anglcd, Bcaltered, erect, straight, dark green. Cones ovate, 1-2 inche.'* long, 

 ^^a/f'i cliptical, imbricate, ero&eiy deniiculate at the ape.x, undnline on the 

 margins. Black spruce, 



\2 April. Mountain 8wamp^. 30-lOOft. 



18* 



