"Prickly ash is common in the forested areas of East and Southeast Texas, occurring less so through the Edwards Plateau to North Central Texas and Southern Oklahoma. It usually grows in calcareous soils, but is also frequent in the sandy soils of the Rio Grande Plains. It is a rounded shrub or tree whose branchlets, often the foliage and even the trunk are armed with curved prickles. Its leaves are very aromatic. Chewing the bark or leaves reportedly helps to numb toothache pain, hence the common name toothache tree. Zanthoxylum, which means yellow wood, is sometimes incorrectly spelled Xanthoxylum."
This medium to large deciduous shrub (heighth: five to fifteen feet; width: two to ten feet) likes partial to full sun, tolerates high temperatures and limited moisture, prefers alkaline soil and is hardy to USDA Hardiness Zone: 7.
Yellowish green flowers appear in the spring and subsequently produce a reddish-brown seed capsule.
The following butterfly species utilize
Zanthoxylum hirsutum as a larval host.
Papilio (Heraclides) cresphontes
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This page is presented by Bill Oehlke.
This site is presented as an extension of the
World's Largest Saturniidae Site, a private worldwide silkmoth site,
Caterpillars Too!, a private North American butterfly site featuring images of caterpillars,
Sphingidae of the Americas, a free public access site about the Sphingidae (Hawkmoths) of the Americas.
North American Catocala, a free publc access site about the Catocala (underwing moths) of North America.
Tree information is from Aggie Horticulture
Larval hostplant lists have been compiled from
Natural History Museum's
HOSTS - a database of the world's Lepidopteran hostplants