Glyceria is a widespread genus of grass family common across Eurasia, Australia, North Africa, and the Americas.

Glyceria is known commonly as mannagrass in the United States, or, in the UK, sweet-grass. These are perennial rhizomatous grasses found in wet areas in temperate regions worldwide. The base of the grass grows along the ground and may root at several places. Then it grows erect and bears leaf blades which may be flat or folded. The panicle inflorescences nod when heavy. Some mannagrasses are considered weeds while others are endangered in their native habitats.

1. Species

2. Glyceria acutiflora - creeping mannagrass - China, Korea, Japan, northeastern + east-central USA

3. Glyceria alnasteretum - Alaska, Russian Far East, Japan, Korea

4. Glyceria × amurensis - Amur Oblast

5. Glyceria arkansana - Arkansas mannagrass - south-central USA

6. Glyceria arundinacea - Eurasia from Hungary to Korea

7. Glyceria australis - Australian sweetgrass - Australia

8. Glyceria borealis - northern mannagrass - western, north-central, + northeastern USA incl Alaska; Canada incl Yukon + Northwest Territories; Mexico (Chihuahua)

9. Glyceria canadensis - rattlesnake mannagrass, Canadian mannagrass - Canada; USA (Northeast, Great Lakes, Oregon, Washington)

10. Glyceria caspia - Caucasus

11. Glyceria chinensis - China (Yunnan, Guizhou)

12. Glyceria colombiana - Colombia

13. Glyceria declinata - waxy mannagrass, low glyceria, small sweet-grass - Europe, Morocco, Madeira, Azores, Canary Islands; naturalized in scattered locales in North America and New Zealand

14. Glyceria depauperata - Japan, Kuril Islands

15. Glyceria × digenea - France, Czech Republic

16. Glyceria drummondii - Western Australia

17. Glyceria elata - tall mannagrass - western USA, British Columbia, Alberta

18. Glyceria fluitans - water mannagrass, floating sweet-grass - Morocco; Eurasia from Iceland + Portugal to Turkmenistan

19. Glyceria × gatineauensis - Québec, New York, West Virginia

20. Glyceria grandis - American mannagrass - USA incl Alaska; Canada incl Yukon + Northwest Territories

21. Glyceria insularis - Tristan da Cunha

22. Glyceria ischyroneura - Japan, Kuril Islands, Korea

23. Glyceria latispicea - New South Wales

24. Glyceria leptolepis - Russian Far East, China incl Taiwan, Korea, Japan

25. Glyceria leptorhiza - Korea, Honshu, Hokkaido, Heilongjiang, Amur Oblast, Khabarovsk, Zabaykalsky Krai

26. Glyceria leptostachya - davy mannagrass, narrow mannagrass - California, Oregon, Washington, British Columbia, Alaska

27. Glyceria lithuanica - Lithuanian mannagrass - northern Eurasia from Norway to Korea

28. Glyceria maxima - reed mannagrass, English watergrass, reed sweet-grass - Eurasia from Ireland to Xinjiang

29. Glyceria melicaria - melic mannagrass - eastern North America

30. Glyceria multiflora - Chile, Argentina, Uruguay, Rio Grande do Sul, Santa Catarina

31. Glyceria nemoralis - Caucasus, central + eastern Europe

32. Glyceria notata - marked glyceria, plicate sweet-grass - Eurasia + North Africa from Denmark + Morocco to Xinjiang

33. Glyceria nubigena - Great Smoky Mountain mannagrass - Great Smoky Mountains of North Carolina + Tennessee

34. Glyceria obtusa - Atlantic mannagrass - eastern North America

35. Glyceria occidentalis - northwestern mannagrass - California, Oregon, Washington, British Columbia, Idaho, Nevada

36. Glyceria × ottawensis - Ontario

37. Glyceria × pedicellata - northern + central Europe

38. Glyceria pulchella - MacKenzie Valley mannagrass, beautiful glyceria - Alaska, western Canada incl Yukon + Northwest Territories

39. Glyceria saltensis - Salta Province in Argentina

40. Glyceria septentrionalis - floating mannagrass - eastern USA, eastern Canada, northeastern Mexico

41. Glyceria spicata - India, Mediterranean

42. Glyceria spiculosa - eastern Russia, northern China, Korea

43. Glyceria striata - fowl mannagrass, ridged glyceria - Canada incl Arctic Territories, USA incl Alaska, Mexico, Guatemala

44. Glyceria × tokitana Masamura - Japan

45. Glyceria tonglensis C.B.Clarke - Himalayas, China incl Tibet

46. formerly included

Numerous species now considered better suited to other genera: Arctophila Catabrosa Colpodium Dryopoa Eragrostis Hydrocotyle Melica Phippsia Poa Puccinellia Scolochloa Torreyochloa Triplasis

References