Smithsonian Contr. Knowl. 5(6): 29, plate 12, fig. B. 1853
w, c United States, Mexico.
Species 4 (4 in the flora).
Glossopetalon is treated here as comprising one relatively widespread and morphologically variable species and three narrowly endemic, more morphologically homogeneous relatives. The plants occur mostly on calcareous substrates. Taxa within Glossopetalon are relatively character-poor, especially on herbarium specimens, and the characters used to distinguish taxa in past treatments are variable among populations. The genus is in need of more detailed study using biosystematic and molecular methods. In navigating the keys, characters of leaf shape, stipule development, and numbers and shapes of perianth parts should be studied closely by observing multiple examples of a given structure from a specimen in order to facilitate determinations. Rapidly expanding extension shoots sometimes produce atypical leaves that are larger and broader than the limits stated in the keys and descriptions.
Forsellesia Greene, often included as a synonym of Glossopetalon, is an illegitimate name.
|1||Plants 5–25 cm, forming relatively low mounds or mats||> 2|
|1||Plants 25–300 cm, forming relatively tall mounds or upright||> 3|
|2||Leaf blade apices short-acuminate to sharply acute, sometimes mucronate, mucro 0.1–0.4 mm; petals 3–5, 2–4 × 0.4–1 mm; stamens 4–6, in 1 equal series.||Glossopetalon clokeyi|
|2||Leaf blade apices acute or short-acuminate, mucronate, mucro 0.6–1.2 mm; petals 5, 6–8 × 1.5–2.2 mm; stamens 10, in 2 unequal series.||Glossopetalon pungens|
|3||Stem tips mostly strongly spinescent; leaf blade margins usually not, sometimes slightly and evenly, thickened; stipules absent (var. spinescens) or triangular to subulate.||Glossopetalon spinescens|
|3||Stem tips not or weakly spinescent; leaf blade margins (and midveins) ± thickened; stipules absent.||Glossopetalon texense|
|Author||Charles T. Mason Jr.† + and George Yatskievych +|
|Authority||A. Gray +|
|Common name||Greasebush +|
|Distribution||w +, c United States + and Mexico. +|
|Etymology||Greek glossa, tongue, and petalon, spreading, alluding to outspreading tongue-like petals +|
|Illustration copyright||Flora of North America Association +|
|Illustrator||Barbara Alongi +|
|Publication title||Smithsonian Contr. Knowl. +|
|Publication year||1853 +|
|Reference||ensign1942a +, holmgren1988a + and thorne1978a +|
|Source xml||https://firstname.lastname@example.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse grained fna xml/V9/V9 16.xml +|
|Taxon family||Crossosomataceae +|
|Taxon name||Glossopetalon +|
|Taxon parent||Crossosomataceae +|
|Taxon rank||genus +|
|Volume||Volume 9 +|