Piptochaetium

Piptochaetium, speargrass, is a genus of New World plants in the grass family, native to North and South America. Piptochaetium is a bunchgrass genus in the Stipeae tribe.

Some of its species have been included in the genus Stipa by some authors.

1. Piptochaetium alpinum - Santa Catarina, Rio Grande do Sul
2. Piptochaetium angolense - Coquimbo
3. Piptochaetium angustifolium - Coahuila, Tamaulipas, Nuevo León, México State
4. Piptochaetium avenaceum — black oatgrass, blackseed needlegrass - United States (Texas to Florida north to Massachusetts + Michigan), Ontario, Tamaulipas, Nuevo León
5. Piptochaetium avenacioides - Florida speargrass - Florida
6. Piptochaetium bicolor - Rio Grande do Sul, Argentina, Uruguay, Chile incl Juan Fernández Islands
7. Piptochaetium brachyspermum - Buenos Aires
8. Piptochaetium brevicalyx - central + eastern Mexico
9. Piptochaetium burkartianum - Corrientes
10. Piptochaetium cabrerae - Buenos Aires
11. Piptochaetium calvescens - Buenos Aires, Uruguay
12. Piptochaetium confusum - Uruguay, Rio Grande do Sul, Entre Rios
13. Piptochaetium cucullatum - Uruguay
14. Piptochaetium featherstonei - Peru, Bolivia
15. Piptochaetium fimbriatum - pinyon ricegrass - Arizona, Texas, New Mexico, Mexico, Guatemala
16. Piptochaetium hackelii - Argentina, Uruguay
17. Piptochaetium hirtum - Chile
18. Piptochaetium indutum - Ecuador, Peru, Bolivia, Salta, Jujuy
19. Piptochaetium jubatum - Uruguay
20. Piptochaetium lasianthum - Uruguay, Argentina, Santa Catarina, Rio Grande do Sul
21. Piptochaetium leiopodum - Buenos Aires, Uruguay
22. Piptochaetium medium - Uruguay, Argentina, Brazil, Venezuela
23. Piptochaetium montevidense - Uruguayan ricegrass - Argentina, Chile, Uruguay, Brazil, Paraguay, Bolivia, Peru, Ecuador, Venezuela
24. Piptochaetium napostaense - Argentina
25. Piptochaetium palustre - Santa Catarina
26. Piptochaetium panicoides - Argentina, Chile, Uruguay, Brazil, Colombia, Bolivia, Peru, Ecuador, Venezuela
27. Piptochaetium pringlei - Pringle's speargrass - Arizona, Texas, New Mexico, Mexico
28. Piptochaetium ruprechtianum - Uruguay, Argentina, Brazil
29. Piptochaetium sagasteguii - Peru
30. Piptochaetium seleri - Mexico, Guatemala
31. Piptochaetium setosum - bristly speargrass - Chile
32. Piptochaetium stipoides - purple speargrass - Argentina, Chile, Uruguay, Brazil, Colombia; naturalized in Mexico, California
33. Piptochaetium tovarii - Peru
34. Piptochaetium uruguense - Argentina, Uruguay, Santa Catarina, Rio Grande do Sul, Paraguay, San Luis Potosí
35. Piptochaetium virescens - Mexico, Guatemala

see Nassella Stipa