Spiny greasebush (Glossopetalon spinescens aridum)
Description
This shrub forms a dense, erect clump of many thin, branching, thorny stems approaching 2 metres (6.6 ft) in maximum height. The green oval leaves are less than two centimeters long. Small white-petalled flowers appear in the leaf axils. The fruit is a single or double follicle a few millimeters wide. Two varieties are recognized: var. spinescens from southeastern Arizona, New Mexico, Texas, Chihuahua and Coahuila is early deciduous, the leaves either lacking stipules or with stipules less than 0.1 mm long var. aridum M.E. Jones, from northwestern and central Arizona to California and Washington State, with leaves evergreen and with stipules up to 0.9 mm long.
Taxonomic tree
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Domain: Eukarya
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Kingdom: Plantae
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Phylum:
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Class: Magnoliopsida
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Order: Crossosomatales
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Family: Crossosomataceae
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Genus: Glossopetalon
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