Anacua
Ehretia anacua

Family: Boraginaceae

OTHER NAMES
Sandpaper Tree, Knockaway Tree

CHARACTERISTICS
Small evergreen tree 25-45’, may sucker or have multiple trunks. The leaves have a rough texture lending it the name “sandpaper tree”. Flowers in July to August with white, fragrant flowers that are followed by fleshy, spherical fruits (drupes) that are orange to dark yellow. The drupes contain two stones, each with two seeds. The bark is reddish-brown to gray with narrow furrows and peeling scales. Anacua is semi-evergreen, replacing some of the leaves in early spring.

LANDSCAPE USE
Medium sized shade tree or left bushy as a large screening shrub.

Photo of Ehretia anacua by adaita, iNaturalist
Ehretia anacua on Lady Bird Johnson Wildflower Center
Ehretia anacua at the UA Campus Arboretum where you can see specimens planted

GROWING CONDITIONS
AN EXPLANAITION OF TERMS USED

SUN full to part sun
WATER
moderate
SOIL
not picky, but well-drained
HARDINESS
hardy to about 10°F
BASIN
high zone
CONTAINER
does moderately well in containers but will not attain full size
NUTRITION
low
MAINTENANCE
very little

ECOLOGY
Larval host for Anacua Tortoise Beetle (Coptocycla texana), nectar rich flowers for insects, edible fruits for birds, mammals, people. Part of the reason many butterflies visit the flowers is because of the presence of pyrrolizidine alkaloids which some species of butterflies use to attract mates, and for coating their eggs to protect from pests.

ETHNOBOTANY
The fruits are edible, most often made into preserves. The wood is light brown, heavy, hard, and has been used for posts, wheels, spokes, axles, yokes, and tool handles. Flowers produce a light-colored honey. A similar species, Ehretia tinifolia, is a very important medicinal plant and it is possible this species has very similar chemistry.

NATURAL DISTRIBUTION
Found on dry hillsides as a shrub, but reaches tree size in the moist soils of riparian zones and floodplains. It can be found at elevations from sea level to 1,000 ft. from southern Texas, into Mexico as far south as Vera Cruz.

TAXONOMY AND NAME
This plant is in the Boraginaceae, the borage family. There are 65 species of Ehretia native to the tropics and subtropics of the Americas, sub-Saharan Africa, Asia, Papuasia, and Australia..
The generic name honors German botanical illustrator Georg Dionysius Ehret (1708–1770). The species, anacua, is derived from the Mexican Spanish word anacahuite, as is that of the related Cordia boissieri, the anacahuita. That word in turn is derived from the Nahuatl words āmatl, meaning "paper," and cuahuitl, meaning "tree," possibly referring to the bark. The common name, knockaway, is an English corruption of anacua.

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Palo Piojo (Erythrostemon palmeri)

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Bastard Cherry (Ehretia tinifolia)