''Agrostis hendersonii'' is an uncommon species of

grass Poaceae () or Gramineae () is a large and nearly ubiquitous family of monocotyledonous flowering plants commonly known as grasses. It includes the cereal grasses, bamboos and the grasses of natural grassland and species cultivated in lawns an ...

known by the common name Henderson's bent grass. It is native to northern

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

and

Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...

, where it is a rare member of the flora in scattered

vernal pool Vernal pools, also called vernal ponds or ephemeral pools, are seasonal pools of water that provide habitat for distinctive plants and animals. They are considered to be a distinctive type of wetland usually devoid of fish, and thus allow the safe ...

habitats. It is an annual grass ranging in maximum height from 6 to 70 centimeters. It has short, narrow leaves only a few centimeters long. The

inflorescence An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of the shoot of seed plants where flowers are formed o ...

is a dense, narrow, cylindrical tuft no longer than 5 centimeters in length, made up of small spikelets with hairlike tips and bent awns.

References

External links

Jepson Manual TreatmentUSDA Plants ProfilePhoto gallery
hendersonii Flora of California Flora of Oregon Grasses of the United States {{Pooideae-stub