Crypsis alopecuroides
Encyclopedia
Crypsis alopecuroides is a species of grass
Poaceae
The Poaceae is a large and nearly ubiquitous family of flowering plants. Members of this family are commonly called grasses, although the term "grass" is also applied to plants that are not in the Poaceae lineage, including the rushes and sedges...

 known by the common name foxtail pricklegrass. It is native to Europe, the Middle East, and North Africa. It is also known in the western United States as a common and widespread introduced species
Introduced species
An introduced species — or neozoon, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its indigenous or native distributional range, and has arrived in an ecosystem or plant community by human activity, either deliberate or accidental...

, especially in sandy areas around water, such as lakesides. It has also been collected at shipping points near Philadelphia but has not been seen there in about a century. This is an annual grass producing mostly upright and unbranching stems, often dark in color, up to about 75 centimeters in maximum height. The green leaves are up to 12 centimeters long, sometimes waxy in texture. The inflorescence
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. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...

 is a dense cylindrical panicle
Panicle
A panicle is a compound raceme, a loose, much-branched indeterminate inflorescence with pedicellate flowers attached along the secondary branches; in other words, a branched cluster of flowers in which the branches are racemes....

of tiny green to purple spikelets.

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