( 324 ) 
Cones 12-25 cm. long. 6a. P. ponderosa Jeffreyt. 
Cones more persistent; scales tapering to stout incurved points. 
Leaves grayish-green, drooping; cones chestnut brown, 
oval, 15-25 cm. long. 7. P. Sabiniana. 
Leaves blue-green, erect; cones yellowish-brown, long-oval, 
25-35 cm. long. 8. P. Coulteri. 
Leaves in 2’s. 
Cones deciduous, opening at maturity. 
g. P. Murrayana. 
Cones persistent for years, not opening at maturity. 
10. P. attenuata. 
1. Pinus LamBertiana Dougl. Trans. Linn. Soc. 15: 500. 1827. 
Pinus Lambertiana minor Lemmon, Second Bienn. Rep. Calif. 
State Forest. 70, 83. 1888. 
Type locality: On the head waters of the Umpqua River. 
Distribution: The Sugar pine is characteristic of the Sierran’ 
District. It occurs from central Oregon southward to San Pedro 
Martir Mountain, Lower California. Transition. 
Specimens examined: Mount Pinos, Elmer 4196; Swartout Val- 
ley, San Gabriel Mountains, Abrams &§ McGregor 650; Mount San 
Antonio, Abrams 2701; Strawberry Valley, San Jacinto Moun- 
tains, Leiberg 3141; Mount San Gorgonio, Dutton, 1897; moun- 
tains east of San Diego, Parry, 1850. 
2. Pinus FLEXILIS James, Long’s Exped. 2: 27. 1823. 
Type locality: “Inhabits the arid plains subjacent to the Rocky 
Mountains, and extends up their sides to the region of perpetual 
frost.” 
Distribution: The limber pine occurs on the eastern slopes of 
the continental divide from Alberta to western Texas, and ranges 
westward over the mountains of Wyoming, Utah, Nevada, northern 
New Mexico, northern Arizona and southeastern California. In 
California it is found along the eastern slope of the Sierra Nevada 
south of Mono Pass, on the Inyo and Panamint Mountains, and 
on some of the higher peaks of southern California as noted below. 
It is characteristic of the Canadian Zone. 
Specimens examined: Summit of Mount Pinos, Abrams & Mc- 
Gregor 243; North Baldy, San Gabriel Mountains, Abrams & Mc- 
Gregor 605; Dry Lake, Mount San Gorgonio, altitude 2800 meters, 
Abrams &§ McGregor 785; near the summit of Mount San Gor- 
gonio, Abrams &§ McGregor 748; Leberg 3279. 
