Colusa grass | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Clade: | Commelinids |
Order: | Poales |
Family: | Poaceae |
Subfamily: | Chloridoideae |
Tribe: | Cynodonteae |
Subtribe: | Orcuttiinae |
Genus: |
Neostapfia Burtt Davy |
Species: | N. colusana
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Binomial name | |
Neostapfia colusana | |
Synonyms [2] | |
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Neostapfia is a genus of endemic Californian bunchgrasses, in the subfamily Chloridoideae of the grass family, Poaceae. [3] [1] [4] [5] [6] The only known species is Neostapfia colusana, with the common name Colusa grass. [1]
Neostapfia colusana is endemic to the Central Valley of California, in the northern section's Sacramento Valley and in the southern section's San Joaquin Valley. [1] The bunchgrass grows in vernal pools, which are seasonal shallow freshwater ponds.
It is native to the Central Valley counties of Glenn, Colusa, Yolo, Solano, Stanislaus, and Merced. [7] [8]
This rare grass is a federally listed threatened species in the United States. [9] [3]
Neostapfia colusana is a clumping bunchgrass with distinctive cylindrical inflorescences covered in flat spikelets. The inflorescences are said to resemble tiny ears of corn. They fruit in grains covered in a gluey secretion, and when a plant is mature, each clump becomes brown and sticky with the exudate. The genus was named for botanist Otto Stapf.
The plant is limited to vernal pool habitats, a type of ecosystem that is increasingly rare as Central Valley land is consumed by development and agriculture, and damaged by flood-control regimens and other alterations of hydrology. [10]