Glossopetalon spinescens

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Glossopetalon spinescens
Glossopetalon spinescens var aridum 3.jpg
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Crossosomatales
Family: Crossosomataceae
Genus: Glossopetalon
Species: G. spinescens
Binomial name
Glossopetalon spinescens
  • Forsellesia arida (M.E.Jones) A.Heller
  • Forsellesia nevadensis (A. Gray) A. Heller
  • Forsellesia nevadensis (A.Gray) Greene
  • Forsellesia planitierum Ensign
  • Forsellesia spinescens (A.Gray) Greene
  • Forsellesia stipulifera (H.St.John) Ensign
  • Glossopetalon meionandrum Koehne
  • Glossopetalon nevadense A.Gray
  • Glossopetalon planitierum (Ensign) H.St.John
  • Glossopetalon stipuliferum H.St.John

Glossopetalon spinescens is a species of flowering shrub in the family Crossosomataceae known by the common names spiny greasebush, spiny greasewood and Nevada greasewood.

It is native to the western United States and northern Mexico, where it grows in mountainous habitats, often on limestone substrates.


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.[2]

Two varieties are recognized:[2]

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.


  1. ^ "The Plant List: A Working List of All Plant Species". 
  2. ^ a b Mason, C.T. 1992. Crossasomataceae, Crossosoma Family. Journal of the Arizona-Nevada Academy of Science 26:7-9.

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