346 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
squirrel (Ammospermophilus) inhabiting Espfritu Santo Island. The cirucla grows 
asa tree 7.5 to 9 meters in height, with a trunk diameter of 15 to 30cm. A specimen 
in fruit was taken between Agua Colorada and Cerro Colorado, December 15. 
CELASTRACEAE. Staff-tree Family. 
Maytenus phyllanthoides Benth. 
Along the shore of the bay a few miles north of La Paz we found this species abun- 
dant. It grows as a tree 4.5 to 7.5 meters high in low, swampy places, which may be 
submerged at high tide. A specimen was collected here February 3. The species 
was discovered at Magdalena Bay on the voyage of the Sulphur. It was noted by 
Brandegee on the coast at Todos Santos, San Jorge, La Paz, and San José del Cabo, 
and on Margarita Island. 
Watson records the species from the collection made by Palmer at Mulegé in 1887, 
STAPHYLEACEAE. Bladder-nut Family. 
Viscainoa geniculata (Kellogg) Greene. 
A Lower Sonoran desert shrub which, like Simmondsia californica, ranges widely 
in the Peninsula, but reaches its greatest abundance in the extremely arid central 
section from the vicinity of San Fernando south to San Ignacio. It was first met 
with at 1,140 meters altitude near San Matfas Pass, where it was taken in flower June 
17. It was not again noted until we were nearing Jaragudy, 58 miles southeast of 
San Fernando, when it suddenly became abundant on an open gravelly mesa and 
was seen along most of the route thence to San Ignacio. Beyond San Ignacio it was 
noted at intervals as far as Cerro Colorado, northwest of La Paz. The species has 
also been recorded from Sonora. Like Simmondsia californica it shows a preference 
for the desert region along the gulf side of the Peninsula, reaching across to the Pacific 
coast mainly in the central part of its range. It grows 1.5 to 3.5 meters high and is 
commonly associated with such species as Simmondsia californica, Covillea glutinosa, 
Idria columnaris, and Prosopis glandulosa, Besides a flowering specimen in San 
Matfas Pass, one was taken in fruit at Jaraguiy, September 9. 
AESCULACEAE. Buckeye Family. 
Aesculus parryi A. Gray. PARRY BUCKEYE, 
Found common on steep hill slopes facing the coast near Ensenada and up to about 
780 meters altitude near Ojos Negros in San Rafael Valley. It was also noted at 
intervals along the route from San Telmo southward to a point in the hills between 
Rosario and Las Cuevas, but beyond this it was not seen, the country becoming pure 
Lower Sonoran in character. The plant is a shrub 1.2 to 2.5 meters high and appears 
to belong in the Upper Sonoran Zone. Specimens in flower were taken at Ensenada, 
May 20. Recorded by Brandegee from Rosario. 
SAPINDACEAE. Soapberry Family. 
Dodonaea viscosa L. SWITCH SORREL. 
With this species we had already become familiar over wide tropical and sub- 
tropical areas in western Mexico. Although ranging so widely, it was not found in 
great abundance in the Peninsula. It was first noted at Yubay and then along the 
route from Pozo Altamirano to San Pablo. Farther south it was not seen again until 
we entered the foothills of the Victoria Mountains, south of La Paz, where it was 
more common. ‘The species grows as a slender shrub 3 to 6 meters high, reaching 
