WOOTON AND STANDLEY FLORA OF NEW MEXICO. 33 



New Mexico: Santa Fe and Las Vegas mountains; Sandia Mountains; Mogollon 

 Mountains; Black Range; White and Sacramento mountains; Capitan Mountains. 

 High mountains, chiefly in the Canadian Zone. 



A medium-sized tree, 15 to 25 meters high, found only in the higher parts of the 

 mountains, usually associated with the firs and spruces, at elevations of from 2,400 

 to 3,000 meters. It is not very abundant, although it is valued next to the yellow 

 piae for its timber. The cone is large and pendent. The seeds are large for the 

 genus and can be eaten like thoee of the pinyon, but they have thicker and harder 

 shells. 



6. Pinus strobiformis Engelm. in Wisliz. Mem. North. Mex. 102. 1848. 



Mexican white pine. 



Pinus ayacahuite brachyptera Shaw, Publ. Arn. Arb. 1: 11. 1909, not P. hrachyptera 

 Engelm. 1848. 



Type locality: Cosihuiriachi, Chihuahua. 



Range: Northern Mexico to southern Arizona and New Mexico. 



New Mexico: Franeys Peak; San Luis Mountains. Mountains, in the Transition 

 Zone. 



A tree very similar to the preceding, nowhere abundant. It occurs within our area 

 only in the southwestern corner of the State. Reports of its occurrence elsewhere in 

 New Mexico doubtless refer to Pinus fiexilis. 



7. Pinus aristata Engelm. Amer. Journ. Sci. II. 34: 331. 1862. Foxtail pine. 

 Type locality: "Pikes Peak and high mountains of the Snowy Range," Colorado. 

 Range: Higher movmtaina of Colorado and northern New Mexico to Nevada and 



California. 



New Mexico: Pecos Baldy; Grass Mountain; Costilla Pass; Baldy. Canadian and 

 Hudsonian zones. 



A dark green, scrubby tree, 10 to 12 meters high or less, with short leaves curved 

 toward the ends of the branches. It occurs only in the higher mountains at alti- 

 tudes of 3,000 meters or more, and nowhere in abundance. On the higher peaks at 

 or above timber line the plants are low and stunted, often spreading over the ground, 

 forming what the Germans call "Krumholz." This is the result of the high velocity 

 of the wind at these altitudes. 



8. Pinus arizonica Engelm. U. S. Rep. Expl. Miss. Pacif. 6: 261. 1878. 



Arizona yellow pine. 

 Pinus ponderosa arizonica Shaw, Publ. Arn. Arb. 1: 24. 1909. 

 Type locality: "On the Santa Rita Mountains," Arizona. 



Range: Mountains of northern Mexico and southern Arizona and New Mexico. 

 New Mexico: Summit of Animas Peak {Goldman 1360). Transition Zone. 



2. PICEA Link. Spruce. 



Conical trees with short stiff sharp-pointed solitary leaves standing out in all direc- 

 tions from the stems; cones pendulous, their scales rather thin, persistent, the bracta 

 shorter than the scales. 



key to the species. 



Young branches and leaf bases pubescent; cones short, 3 to 5 cm. 



long; leaves dull green, not glaucous 1. P. engelmanni. 



Young branches and leaf bases glabrous; cones longer, 5 to 9 cm. 



long; leaves on the older parts usually dark green, the young 



ones glaucous and light-colored 2. P. parryana. 



52576°— 15 3 



