GOLDMAN—PLANT RECORDS OF LOWER CALIFORNIA. 813 
appear like herbarium specimens of J. californica. Dr. J. A. Veatch, the collector 
of the type material of J. cedrosiana, says: ‘‘This juniper grows rather abundantly 
in some localities on Cerros [Cedros] Island. It is found most abundant about the 
middle of the island, on the eastern side, in deep ravines, usually at an elevation of 
600 or 700 feet above the sea.”’ 
It is worthy of note that in the remarks accompanying the original description of 
J. cedrosiana mention is made of specimens previously collected by Doctor Veatch in 
the hills along the west side of the San Joaquin Valley in California and supposed to 
represent the same species. This supposition seems confirmed by later investiga- 
tions. The name “Cedros” usually applied to the island seems to be derived from 
the Spanish word ‘‘cedro,’’ commonly used by the Mexicans as the name for trees of 
this group. 
Libocedrus decurrens Torr. INCENSE CEDAR. PLATE 104, A. 
Moderately common, mainly on the cooler slopes at 2,100 to 2,400 meters altitude 
near La Grulla and Vallecitos in the San Pedro Martir Mountains. A specimen with 
immature fruit was taken at La Grulla, July 20. It also occurs sparingly on the Sierra 
del Pinal. 
Pinus jeffreyi Oreg. Com. JEFFREY YELLOW PINE. PLATE 105, A, B. 
Pines of the ponderosa type grow as a more or less continuous forest in the Transition 
Zone along the western side of the Pinal and San Pedro Martir Mountains, extending 
from varying elevations between 1,200 and 1,800 meters (this lower limit depending on 
moisture and slope exposure), up to the summit of the range. In spite of poor soil 
these pines grow in places to large size and are by far the most important forest trees 
of the region. Some timber has been sawed in the Sierra del Pinal, but the rugged 
character of the San Pedro Martir Mountains makes lumbering operations difficult. 
Having the somewhat uncertain status of jeffreyi in mind, we were anxious to discover 
whether more than one pine of the ponderosa type occurs in these mountains. Cursory 
examination, in the field seemed to show a wide range of variation irrespective of 
altitude and we came to no satisfactory conclusion, possibly because we were unaware 
of some of the distinguishing characteristics of the two forms. We found trees with 
large and with small cones standing in close proximity and by this character alone 
easily separable. But other trees were seen with cones so nearly intermediate in size 
that we abandoned this character as unreliable. A study of these pines may demon- 
strate the occurrence of two forms, as in southern California. Our specimens col- 
lected at Vallecitos were referred to jeffreyi by George R. Shaw. 
Pinus lambertiana Dougl. SUGAR PINE. PLATE 105, B. 
The sugar pine, like the lodgepole pine, is known from Mexico only in the San 
Pedro M&rtir Mountains. It was noted by us in the upper part of the Transition 
Zone, mainly on northern exposures above 2,250 meters, near La Grulla and Valle- 
‘ citos, and thence upward to near the summit of the range. It occurs rather sparingly 
and is associated here with the yellow pine and white fir. A specimen taken at 
Vallecitos was determined for us by Mr. Shaw. 
Pinus coulteri Lambert. COULTER PINE. 
This pine occurs mixed with the Jeffrey yellow pine on the top of the Sierra del 
Pinal. It is not known from the San Pedro Martir Mountains, 
Pinus cembroides Zuce. MEXICAN PINYON. 
The pinyons, or nut pines, are restricted in Lower California to the higher moun- 
tains in the northern and extreme southern parts of the Peninsula. According to 
+ Hesperian 4: 4. 1860. 
