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Pinus monticola and Pinus albicaulis have been reported from 
southern California, but I have not seen any specimens, and their 
presence within our range is doubtful. 
3. Pinus quaprirouia Parry; Parl. in DC. Prod. 16, pt. 2: 
402. 1868 
Pinus parryana Engelm. Am. Journ. Sci. II, 34: 332. 1862. 
Not Gord. 1858. 
Type locality: “On the mountains east of San Diego.” 
Distribution: Parry’s pine occupies a belt on the mountains 
of northern Lower California corresponding to that of P. mono- 
phylla on the mountains bordering the Mohave Desert, It ex- 
tends northward, sparingly, along the desert slope to the Santa 
Rosa Mountains of southern California. Upper Sonoran. 
Specimens examined: Coyote Canyon, Santa Rosa Mountains, 
Leiberg 3164; Hall 2139; mountains east of San Diego, Parry, 
1850; near Walker’s ranch, between Campo and Jacumba Hot 
Spring, Vasey, 1880. 
4. Pinus MONOPHYLLA Torr. & Frem. in Frem. Second Rep. 319, 
pl. 4. 1845. 
Pinus Fremontiana Endl. Syn. Conif. 183. 1847, in part. 
Type locality: “Extensively diffused over the mountains of 
northern California from long. 111° to 120°, and through a con- 
siderable range of latitude.” 
Distribution: The pifion is characteristic of the Great Basin 
district. It extends over the mountains of the Great Basin, 
ranging westward to the eastern slopes of the Sierra Nevada and 
southward along the desert slopes of the southern California moun- 
tains to the northern border of Lower California. In southern 
California the pinon forms a distinct belt along the northern 
slopes of the San Gabriel and the San Bernardino Mountains, 
ranging from 1000 to 1500 meters in altitude. South of the San 
Bernardino Mountains it becomes rare and finally is superseded by 
P. quadrifolia near the Mexican boundary. Upper Sonoran. 
Specimens examined: Mount Pinos, Elmer 3983; near the Frazier 
Borax Mine, Mount Pinos, Abrams 8 McGregor 269; Mutau Flat, 
head of Piru Creek, Abrams & McGregor 186; Lone Pine Canyon, 
San Gabriel Mountains, Abrams & McGregor 669; between Bear 
Valley and Cushenberry Spring, Abrams 2136; Morongo King 
