Genus Erymophyllum in Tribe Gnaphalieae
In botanical taxonomy, a genus (plural genera) is a rank used to group closely related species within a family. In the hierarchy, genus sits below family and above species.
Genera are defined by shared morphological, anatomical, and genetic characteristics (for example, features of flowers, fruits, seeds, or leaves) that indicate a close evolutionary relationship among the species they contain.
Each genus can include one or more species. Examples include Rosa (roses) and Solanum (nightshades, including tomato and eggplant).
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Genus Description
Suggest a correction!Erymophyllum is a small genus in Amaranthaceae (subfamily Camphorosmoideae, tribe Camphorosmeae). POWO (2024) records six accepted species, a number that closely matches the counts of other major checklists, indicating modest taxonomic stability. The genus is endemic to the arid and semi‑arid zones of southern and south‑western Australia, occurring on sandplains, saline depressions and low‑elevation limestone outcrops. Its name derives from the Greek eremos (desert) and phyllon (leaf) (Wilson, 1973), reflecting the leaf morphology of its drought‑adapted members.
Morphologically the genus consists of low, often cushion‑forming shrubs with reduced, opposite or alternate leaves that are fleshy, entire and frequently covered with indumentum. Stipules are absent. Inflorescences are compact, glomerulate spikes from leaf axils; the minute, unisexual flowers have a five‑parted, petal‑less perianth typical of the tribe. The superior, unilocular ovary bears a single basal ovule; the fruit is a membranous utricle, and the seed contains a curved embryo—an adaptation to dry habitats. Morphological details of the genus were described in the original treatment (Wilson, 1973).
Diversity is concentrated in the southern wheatbelt and adjacent coastal dunes of Western Australia, with a few species extending into South Australia. Several taxa are regional endemics on lateritic soils, while a broader‑ranging member occurs across the Nullarbor. All taxa occupy low elevations (generally
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Erymophyllum compactum (Paul G.Wilson)
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Erymophyllum glossanthus (Paul G.Wilson)
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Erymophyllum hemisphaericum (Paul G.Wilson)
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Erymophyllum ramosum ((A.Gray) Paul G.Wilson)
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Erymophyllum tenellum ((Turcz.) Paul G.Wilson)