Calamagrostis

Calamagrostis, or Small-reed or (Am.) Reedgrass, is a genus in the Grass family Poaceae with about 230 species that occur mainly in temperate regions of the Northern Hemisphere. They are commonly adventive. These tufted perennials usually have hairless narrow leaves. The ligules are usually blunt. The inflorescence forms a panicle. Some may be reed-like.

The roots may be rhizomatous (underground stems with shoots), stoloniferous (with runners), or caespitose (growing in tufts or clumps).

The bisexual spikelets have a single flower and are purple or purple-brown. They appear in early summer on long culms. They can be very decorative.

The word "Calamagrostis" is derived from the Greek word kalamos (reed) and agrostis (a kind of grass).

Many species of "Calamagrostis" are morphologically similar, but they generally occur in distinct habitats, and they have unique geographical distributions. Given the subtle distinctions between many closely related taxa, there are several species complexes that could benefit from additional systematic study. Even the generic boundaries of the genus are controversial. For example, species in the genus "Deyeuxia", distributed largely in the southern hemisphere are morphologically very similar to species of "Calamagrostis". It is probably appropriate to recognize all of these species in a single genus, but this will require detailed scientific study of DNA of species from around the world.


Species
Calamagrostis arundinacea is a species of grass in the Poaceae family, native to Eurasia.

Calamagrostis canescens is a species of grass in the Poaceae family, native to Europe and Western Siberia.

Calamagrostis nutkaensis is a species of grass known by the common names Pacific reedgrass and Nootka reedgrass. It is native to western North America from Alaska to central California, where it is mainly a coastal species growing in moist areas such as beaches and wetlands. This is a perennial grass forming thick tufts of stems which may exceed a meter in height. There are several flat grass leaves up to a centimeter wide. The inflorescence is usually narrow and thin.

Calamagrostis stricta is a species of grass in the Poaceae family, native to wetlands of the Holarctic Kingdom.

Calamagrostis tweedyi - Tweedy's Reedgrass

Calamagrostis varia

Calamagrostis canadensis - Canadian Small-reed

Calamagrostis brachytriga - Fall Blooping Reed

Calamagrostis villosa

Calamagrostis ophitidis - Serpentine Reedgrass

Calamagrostis perplexa - Wood Reedgrass

Calamagrostis pickeringii - Pickering's Reedgrass

Calamagrostis porteri - Porter's Reedgrass

Calamagrostis pseudophragmites

Calamagrostis rubescens - Pinegrass, Pine Reedgrass

Calamagrostis breweri - Shorthair Reedgrass

Calamagrostis cainii - Cain's Reedgrass

Calamagrostis scopulorum - Ditch Reedgrass, Jones Reedgrass

Calamagrostis expansa - Maui Reedgrass

Calamagrostis foliosa - Leafy Reedgrass

Calamagrostis hillebrandii - Hillebrand's Reedgrass

Calamagrostis hyperborea - Northern Reedgrass

Calamagrostis inexpansa

Calamagrostis koelerioides - Fire Reedgrass

Calamagrostis × kolymensis - Kolymen Reedgrass

Calamagrostis lapponica - Lapland Reedgrass

Calamagrostis leonardii

Calamagrostis holmii - Holm's Reedgrass

Calamagrostis bolanderi - Bolander's Reedgrass

Calamagrostis howellii - Howell's Reedgrass

Calamagrostis scotica

Calamagrostis scribneri

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