e0121252f3f12cc92b67a938bb64657a

FAGACEAE

Quercus ajoensis C.H.Mull.

Location: Arizona, US; Ajo Mountains, Organ Pipe Cactus National Monument, 2 individuals from a dense local population limited to this area (100m stretch) in the south fork of Alamo Canyon (more discrete populations may be present up canyon, also in Arch Canyon). 40 m up canyon from individual #2. UTM: 338324, 3548879 (+/- 3m accuracy); Elevation: 733 m.

Plant Attributes: multi-stemmed tree, 3m height, dbh: 28cm, fruiting

Habitat/Associates: n-flowing drainage, grove of oaks; surrounding canyon slopes are a dry rocky desert shrubland of Lycium sp., Simmondsia chinensis, Acacia greggii. In scrubby drainage: Celtis reticulata trees, Sapindus sp., Dodonea viscosa, Prosopis velutina, Ambrosia cordifolia, Baccharis emoryi.

Beth Fallon

# JCB-US-AZ-AM-AJ-1 (AZ-ORPI Q. ajoensis-1)

July 22, 2012

Phylogeny of the oaks of the Americas: Diversification of an ecologically important clade across the tropical-temperate divide. (2012-2015 NSF Grant, DEB 114648)