Monotypic Poaceae genera

Nardus is a genus of plants belonging to the grass family, containing the single species Nardus stricta, known as matgrass. It is placed in its own tribe Nardeae within the subfamily Pooideae. The name derives from ancient Greek '' () from the earlier Akkadian lardu. It is not to be confused with spikenard, Nardostachys jatamansi''.

Pholiurus is a genus of Eurasian plants in the grass family. The only known species is Pholiurus pannonicus, found in a region stretching from Austria to Kazakhstan.

Phaenosperma is a genus of Asian plants in the grass family. The only known species is Phaenosperma globosum, native to China (Anhui, Gansu, Guangxi, Hubei, Jiangsu, Jiangxi, Shaanxi, Sichuan, Taiwan, Tibet, Yunnan, Zhejiang), Japan, Korea, Assam, and Bhutan.

Hygroryza (watergrass) is a monotyipic genus of Asian flowering plants in the grass family. The only known species is Hygroryza aristata, (Asian watergrass) native to China (Fujian, Guangdong, Hainan, Taiwan, Yunnan), Bangladesh, Cambodia, India (Maharashtra, Karnataka, Assam, etc.), Laos, Malaysia, Myanmar, Nepal, Pakistan, Sri Lanka, Thailand, Vietnam.

Avellinia is a genus of Mediterranean plants in the grass family. The only known species is Avellinia festucoides, found throughout much of the Mediterranean Region from Portugal and Morocco to Turkey. It is also reportedly naturalized in Australia.

Echinaria is a genus of Eurasian and North African plants in the grass family. The only known species is Echinaria capitata, native to the Mediterranean Region as well as the Southwest and Central Asia (from Portugal and Morocco to Kazakhstan).

thumb|right|Lygeum spartum MHNT

Stephanachne is a genus of Asian plants in the grass family. It contains a single species, Stephanachne nigrescens, a perennial grass native to north-central, south-central, and western China (Gansu, Qinghai, Shaanxi, and Sichuan).

Agnesia is a genus of herbaceous South American bamboo in the grass family.

Scolochloa is a genus of grasses in the family Poaceae / Gramineae, now containing a single species, Scolochloa festucacea. Common rivergrass is a common name for the species. Scolochloa festucacea grows in Europe, temperate Asia, and North America. Its culms are erect and in height; its leaf blades are long and wide.

Anomochloa is a monotypic genus of flowering plants in the grass family, Poaceae. It is one of the two genera in its subfamily and the only genus in the tribe Anomochloeae. The only known species is Anomochloa marantoidea, native to the State of Bahia in eastern Brazil.

Oxytenanthera is a genus of African bamboo. Bamboos are members of the grass family Poaceae.

Taeniatherum is a genus of Eurasian and North African plants in the grass family.

Hordelymus is a genus of European, north African, and southwest Asian plants in the grass family. thumb|left|Hordelymus europaeus

Athroostachys is a Brazilian genus of bamboo in the grass family.

Alexfloydia is a genus of perennial stoloniferous grasses in the panic grass subfamily of the Poaceae grass family.

thumb|Apluda mutica L. Apluda is a genus of plants in the grass family native to Asia and to various islands in the Indian and Pacific Oceans.

Psammochloa is a plant genus in the grass family. The only known species is Psammochloa villosa.

Scutachne is a genus of plants in the grass family Poaceae. The only known species is Scutachne dura, it is native to Cuba, Jamaica, and Hispaniola (Haiti + Dominican Republic).

Tetrachaete is a genus of plants in the grass family. The origin of the genus name is Greek, from tetra for "four" and chaite, for "bristle." There is only one known species, Tetrachaete elionuroides, native to Eritrea, Ethiopia, Somalia, Kenya, Tanzania, Yemen, and Oman.

Schoenefeldia is a genus of Asian and African plants in the grass family. It contains a single species, Schoenefeldia gracilis, an annual grass native to the Sahara and Sahel in Africa, to Saudi Arabia and Yemen on the Arabian Peninsula, and to India and Pakistan.

Mniochloa is a genus of Cuban plants in the grass family. The only known species is Mniochloa pulchella, native to eastern Cuba near Guantánamo.

Dasyochloa is a monotypic genus containing the single species Dasyochloa pulchella (formerly Erioneuron pulchellum), also known as desert fluff-grass or low woollygrass. It is a densely tufted perennial grass found in the deserts of the southwestern United States and northern Mexico.

Airopsis is a genus of southern European and northern African plants in the grass family.

Arundoclaytonia is a genus of Brazilian plants in the grass family.

Megalachne is a genus of Chilean plants in the grass family, found only on the Juan Fernández Islands in the Pacific Ocean, part of the Republic of Chile. It contains a single species, Megalachne berteroniana.

Gynerium is a monotypic genus of Neotropical plants in the grass family, native to Mexico and Colombia, Central America, South America, and the West Indies. It is classified in its own tribe Gynerieae.

Hainardia is a genus of coastal plants in the grass family, native to the Mediterranean Basin.

Lamarckia is a genus of plants in the grass family native to the Old World Dry Belt, on the Mediterranean Region, the Arabian Peninsula, East Africa and South Asia. It has a single species, Lamarckia aurea, known colloquially as the '''golden dog's-tail or goldentop grass'''.

Brylkinia is a genus of East Asian plants in the grass family. The only known species is Brylkinia caudata, native to Japan, China (Sichuan, Jilin), and Russia (Kuril, Sakhalin).

Actinocladum is a South American genus of bamboo in the grass family.

Exotheca is a monotypic genus of African and Southeast Asian plants in the grass family.

Thysanolaena is a monotypic genus of the grass family, in the tribe Thysanolaeneae. Its only recognized species is Thysanolaena latifolia (formerly Thysanolaena maxima), native to Bangladesh, Bhutan, Cambodia, China (Guangdong, Guangxi, Guizhou, Hainan, Yunnan), India, Indonesia, Laos, Malaysia, Myanmar, Nepal, New Guinea, Philippines, Sri Lanka, Taiwan, Thailand, and Vietnam. It is also naturalized in Mauritius, Seychelles, Gambia, Tanzania, Hawaii, California, the West Indies and Brazil.

Heteranthelium is a genus of Asian plants in the grass family. The only known species is Heteranthelium piliferum, native to Central Asia, Afghanistan, Pakistan, Iran, Middle East, Turkey, and the Caucasus.

Hitchcockella baronii is a species of bamboo, the only known species of the genus Hitchcockella. It is found in Madagascar and was first described by Aimée Antoinette Camus in 1925.

Sohnsia is a genus of plants in the grass family. The only known species is Sohnsia filifolia, native to the States of San Luis Potosí and Querétaro in northeastern Mexico. It is dioecious, with its chromosome number being 2n = 20.

Steyermarkochloa is a genus of plants in the grass family. The only known species is Steyermarkochloa angustifolia , which is native to Colombia (Guainía), Venezuela (Amazonas), and Brazil (Amazonas).

Acostia is a genus of South American plants in the grass family.

Metcalfia is a genus of plants in the grass family. It contains a single species, Metcalfia mexicana, native to Mexico.

Piptophyllum is a genus of plants in the grass family. The only known species is Piptophyllum welwitschii, native to Angola.

Avenula is a genus of Eurasian flowering plants in the grass family. Over 100 names have been proposed for species, subspecies, varieties, and other infraspecific taxa within Avenula, but only one species is accepted. The others names are all regarded as synonyms of other accepted names. The only recognized species in the genus is Avenula pubescens, commonly known as downy oat-grass or downy alpine oatgrass, native to Europe and Asia from Iceland and Portugal to Xinjiang, Mongolia, and Siberia. It is also naturalized in scattered locations in North America, in states as Connecticut, Delaware,

Coleanthus is a genus of Eurasian and North American plants in the grass family. The only known species is Coleanthus subtilis. It has a scattered distribution, found on lakeshores, streambanks, and other wet places in central Europe (France, Germany, Czech Republic; extinct in Norway and Italy), Asia (Western Siberia, Khabarovsk, eastern China), and northwestern North America (Oregon, Washington, British Columbia).

Reynaudia is a genus of plants in the grass family. The only known species is Reynaudia filiformis, native to the Greater Antilles (Cuba, Jamaica, and Hispaniola).

Kaokochloa is a genus of African plants in the grass family.

Swallenia is a rare monotypic genus of plants in the grass family, found only in Death Valley National Park, California.

Entoplocamia is a genus of African plants in the grass family. The only known species is Entoplocamia aristulata, native to Angola and Namibia.

Apoclada is a genus of Brazilian bamboo in the grass family).

thumb | right | An illustration of Crithopsis delileana as found in Egypt Crithopsis is a genus of plants in the grass family, native to the Mediterranean and nearby areas.

Schizachne is a genus of Eurasian and North American plants in the grass family. The only accepted species is Schizachne purpurascens, commonly called false melic. Three subspecies are recognized: Schizachne purpurascens subsp. callosa (Turcz. ex Griseb.) T.Koyama & Kawano – European and Asiatic Russia, China (Hebei, Heilongjiang, Henan, Jilin, Liaoning, Shanxi, Yunnan), Mongolia, Korea, Kazakhstan Schizachne purpurascens subsp. capillipes (Kom.) Tzvelev – Kamchatka Schizachne purpurascens subsp. purpurascens – Canada (all 10 provinces plus Yukon + NWT), United States (Alaska, Rocky Mountai

Pohlidium is a genus of Panamanian plants in the family Poaceae. The only known species is Pohlidium petiolatum, native to Coclé Province in central Panama.

Tetrachne is a monotypic genus of grass in the family Poaceae. The sole species is Tetrachne dregei, known by the common name robies cocksfoot. It is native to South Africa.

Acritochaete is a genus of African plants in the grass family.

Anisopogon is a genus of Australian plants in the grass family. The only known species is Anisopogon avenaceus, native to Victoria and New South Wales. It is known commonly as oat speargrass. It is a perennial grass growing up to 1.5 metres tall, bearing spikelets up to 6 centimetres long.

Chaetobromus is a genus of African plants in the grass family.

Cottea is a genus of plants in the grass family native to North and South America. There is only one known species, Cottea pappophoroides, native to the southwestern United States (southern Arizona, southern New Mexico, western Texas), Mexico, Ecuador, Peru, Bolivia, and Argentina. (The name Cottea sarmentosa was coined in 1854 for a species now known as Enneapogon desvauxii.)

Parafestuca is a genus of plants in the grass family. The only known species is Parafestuca albida, found only on the Portuguese Island of Madeira in the North Atlantic.

Neostapfia is a genus of endemic Californian bunchgrasses, in the subfamily Chloridoideae of the grass family, Poaceae. The only known species is Neostapfia colusana, with the common name Colusa grass.

Polytrias is a genus of Asian, African, and Pacific Island plants in the grass family, commonly called Java grass, Batiki bluegrass, Indian murainagrass, or toto grass. The only known species is Polytrias indica, native to West Africa (from Senegal to Cameroon), Seychelles, the Indian subcontinent, southern China, Southeast Asia, New Guinea, Fiji, and Micronesia. It is also cultivated as a lawn grass in other tropical regions, and naturalized in scattered locations in tropical North and South America.

Allolepis is a genus of North American plants in the grass family. The only known species is Allolepis texana (Texas false saltgrass).

Halopyrum is a genus of Asian and African plants in the grass family. The only known species is Halopyrum mucronatum, native to the Indian subcontinent, Iran, the Arabian Peninsula, Socotra, Madagascar, and eastern + northeastern Africa (from Egypt to Mozambique).