''Agrostula'' is a genus of

grass Poaceae ( ), also called Gramineae ( ), is a large and nearly ubiquitous family (biology), family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos, the grasses of natural grassland and spe ...

es. It includes a single species, ''Agrostula truncatula'', which is native to the

Pyrenees The Pyrenees are a mountain range straddling the border of France and Spain. They extend nearly from their union with the Cantabrian Mountains to Cap de Creus on the Mediterranean coast, reaching a maximum elevation of at the peak of Aneto. ...

of France and Spain, Portugal, and Morocco. It includes two subspecies: *''Agrostula truncatula'' subsp. ''durieui'' – western Pyrenees and northern Portugal *''Agrostula truncatula'' subsp. ''truncatula'' – Pyrenees to east-central Portugal and Morocco The species was first described as ''Agrostis truncatula'' by

Filippo Parlatore Filippo Parlatore (Palermo, 8 August 1816 – Florence, 9 September 1877) was an Italian botanist. He studied medicine at Palermo, but practiced only for a short time, his chief activity being during the cholera epidemic of 1837. Although at tha ...

in 1850. In 2020 Paul M. Peterson ''et al.'' renamed it the sole species in the new genus ''Agrostula'' based on phylogenetic and morphological evidence. ''Agrostula'' is distinguished from ''Agrostis'' by leaf blades with continuous pillars of

sclerenchyma The ground tissue of plants includes all tissues that are neither dermal nor vascular. It can be divided into three types based on the nature of the cell walls. This tissue system is present between the dermal tissue and forms the main bulk of th ...

between the adaxial and abaxial blade surfaces, dorsally-rounded glumes with blunt to truncate and erose to denticulate apices, florets half the length of the

glume In botany, a glume is a bract (leaf-like structure) below a spikelet in the inflorescence (flower cluster) of grass Poaceae ( ), also called Gramineae ( ), is a large and nearly ubiquitous family (biology), family of monocotyledonous flow ...

s, lemmas equal in width and length and widest at or near the apex, broadly truncate apices, awnless anthers irregularly 5 to 7 denticulate to erose and longer than the lemmas, and rugose-papillose caryopses.Peterson PM, Sylvester SP, Romaschenko K, Soreng RJ, Barberá P, Quintanar A, Aedo C (2020) A phylogeny of species near Agrostis supporting the recognition of two new genera, ''Agrostula'' and ''Alpagrostis'' (Poaceae, Pooideae, Agrostidinae) from Europe. ''PhytoKeys'' 167: 57-82. https://doi.org/10.3897/phytokeys.167.55171

References

{{Taxonbar, from= Q108300758, from2=Q134413511 Pooideae Monotypic Poaceae genera Flora of France Flora of Morocco Flora of Portugal Flora of Spain Flora of the Pyrenees Taxa described in 2020