hormophoeae

Hormophoeae is a taxonomic tribe within the grass subfamily Chloridoideae. This tribe encompasses a group of grasses known for their distinctive inflorescence structures, often characterized by spicate or paniculate arrangements of spikelets. Members of Hormophoeae are typically found in arid and semi-arid regions across various continents, with a notable presence in Africa, Asia, and Australia.

The morphology of Hormophoeae grasses can vary, but many exhibit adaptations to dry environments, such as tough, wiry leaves and efficient water usage. The spikelets are usually small and inconspicuous, containing one or a few florets. The glumes, which are the bracts enclosing the flower parts, are often reduced or absent in some species, contributing to the streamlined appearance of the inflorescence.

While not extensively cultivated for agricultural purposes, some species within Hormophoeae may hold ecological significance as forage for livestock or as pioneers in disturbed habitats. Their reproductive biology often involves wind pollination, a common strategy among grasses. The classification of genera within Hormophoeae has been subject to revision based on molecular phylogenetic studies, which have helped to clarify evolutionary relationships within the tribe. Examples of genera sometimes included in Hormophoeae are Aristida and Stipagrostis, though taxonomic boundaries can be fluid.