SPRING FLORA 



2. J. Mcoimloriim Sarg. (Sabina scopulorum (Sarg.) Rydb.) 

 Larger than the preceding, sometimes reaching a height of 

 30-60 feet. Leaves opposite; entire; short. Catkins terminal. 

 Fruit smaller than that of No. 1; subglobose; juicy and resi- 

 nous; maturing the second season; blue with a whitish bloom 

 or rarely copper-colored (light-green when immature); seeds 

 2-4. Dry rocky slopes, May. 



2. PINUS. Pine. 



Trees with 2 kinds of leaves: the primary are deciduous 

 bud-scales, in the axils of which are borne the secondary or 

 ordinary foliage leaves. The latter are evergreen, needle- 

 shaped and sheathed at base, in bundles of 2-5 (or single in 

 1 variety). Leaf -buds scaly. Cones large, with thick scales; 

 maturing the second or rarely the third year. Seeds nut-like. 

 Cotyledons 3-16. 



Leaves in fascicles of 5; each with a single vascular 



bundle 1. P. flexilis 



Leaves in fascicles of 2-3 (rarely 1); each with 2 vascular 

 bundles. 



Leaf -margins entire; cone-scales without prickles 2. P. edulia 



Leaf -margins serrulate; cone-scales prickly- 

 armed 3. P. Murrayana 



1. P. flcxilis James. Limber, "White or Nut Pine. A tree, 

 often gnarled, 60 ft. high or less, with few large, straggling 

 branches at irregular intervals. Bark and wood very full of 

 resinous sap; smooth until quite old. Leaves l%-2 in. long 

 (or as much as an inch longer on the cone bearing branches); 

 the sheaths soon dropping off. Cones resinous; 3-5 in. long, 

 light-brown, narrowly ovoid or subcylindrical; their scales 

 blunt-tipped; opening widely at maturity and discharging the 

 seeds. Seeds about % inch long, somewhat angled and flat- 

 tened, each with a narrow wing-rim. Cotyledons 6-7. On 

 exposed mountain cliffs. 



2. P. ediilig Engelm. Pinyon Pine. A low, round-topped 

 tree or sometimes shrubby, ovate in general outline; branches 

 beginning at or near the base. Leaves in twos, or some in 

 threes, 1-1% inches long. Cones sessile, subglobose, 2 inches 

 long. Seeds large, brown, wingless. 



2a. P. edulis moiiophylla (Torr. & Frem.) Jones. (P. mono- 

 phylla Torr. & Frem.) Differs from the type in that the 

 leaves, or some of them, are single. These single leaves are 

 terete; while those of the fascicles are semi-terete. 



3. P. Murrayana Balf. (P. contorta Murrayana Eng.) 

 Lodgepole or Black Pine. A tree sometimes reaching a height 

 of 120 ft. and a diameter of 4-6 feet; tall and straight, with 

 branches in little short whorls near the top. Bark of trunk 

 thin, scaly, light-brown; rough from the start. Leaves 1-3 

 inches long, with resin-ducts as in Abies lasiocarpa. Cones 

 somewhat ovate; 1-2 inches long; often remaining closed for 

 many years; their scales armed with short, stout prickles. 

 Seeds black, rough, ridged on lower side; each with a long, 

 thin, persistent wing, widest below the middle. Cotyledons 

 usually 5. On mountain slopes, 5,000-10,000 ft. 



