MANUAL OF THE GRASSES OF THE UNITED STATES 931 



Airopis lam's Beal, Grasses N.Amer. 2: 577. 1896. Based on Poa laevis 



Vasey. 

 Airopis laevis var. rigida Beal, Grasses N.Amer. 2: 578. 1896. I tali, Jones. 

 Airopis canbyi Beal, Grasses N.Amer. 2: 580. 1896. Based on Glycerin 



canbyi Scribn. 

 Poa laevigata Scribn., U.S.Dept.Agr., Div. Agrost. Bull. 5: 31. 1897. Based 



on P. laevis Vasey. 

 Poa wyomingensis Scribn., Davenport Acad. Sci. Proc. 7: 242. 1899. Big 



Horn, Sheridan County, Wyo., Pammel 192. 

 Poa leckenbyi Scribn., U.S.Dept.Agr., Div. Agrost. Circ. 9: 2. 1899. Scott, 



Klickitat County, Wash., Leckenby in 1898. 

 Poa helleri Rvdb*, Bull. Torrev Bot. Club 36: 534. 1909. Lake Waha, 



Idaho, Heller 3274. 

 Poa buckleyana var. elongata Jones, Contrib. West. Bot. 14: 14. 1912. Based 



on "P. andina var. elongata Vasey", error for P. tenuifolia var. elongata 



Vasey. 

 Poa nevadensis var. laevigata Jones, Contrib. West. Bot. 14: 14. 1912. Based 



on P. laevigata Scribn. 

 Poa nevadensis var. leckenbyi Jones, Contrib. West. Bot. 14: 14. 1912. Based 



on P. leckenbyi Scribn. 

 (4) Poa chapmaniana Scribn., Bull. Torrey Bot. Club 21: 38. 1894. Knox- 



ville, Tenn., Scribner. "P. cristata Chapm. not Walter" cited as synonym, 



but what Chapman described as Poa cristata Walt, is dubious. Scribner 's 



description is ample, and the type is in the National Herbarium. 

 (6) Poa compressa L., Sp. PL 69. 1753. Europe and North America. 



Poa compressa var. sylvestris Torr., Fl. North, and Mid. U.S. 1: 110. 1823. 



New York. 

 Poa compressa forma depauperata Millsp., Fl. W.Va. 472. 1892. Monongalia, 



along Falling Run, W.Va. 

 Paneion compressum LuneJ, Amer. Midi. Nat. 4: 222. 1915. Based on Poa 



compressa L. 

 (10) Poa confinis Vasey, U.S.Dept.Agr., Div. Bot. Bull. 13 2 : pi. 75. 1893. 



Oregon to Alaska [tvpe Tillamook Bav, Oreg., Howell 69 in 1882]. 

 (13) Poa curta Rydb., Bull. Torrey BoL Club 36: 534. 1909. Spread Creek 



[Jackson Hole], Wyo., Tweedy 13. 

 (62) Poa curtifolia Scribn., U.S.Dept.Agr., Div. Agrost, Circ. 16: 3. 1899. 



Mt. Stuart, Wash., Elmer 1148 [type] and 1150. 

 (50) Poa cusickii Vasey, Contrib. U.S. Natl. Herb. 1: 271. 1893. Oregon. 



Cusick 1219. 

 Poa filifolia Vasey, Contrib. U.S. Natl. Herb. 1: 271. 1893. Hatwai Creek, 



Nez Perce County, Idaho, Sandberg 138. 

 Poa idahoensis Beal, Grasses N.Amer. 2: 539. 1896. Based on P. filifolia 



Vase}', not P. filifolia Schur, that name, however, published as synonym 



only. 

 Poa subaristata Scribn.; Beal, Grasses N.Amer. 2: 533. 1896. Not P. subaris- 



tata Phil., 1896 [earlier than P. subaristata Scribn.]. Yellowstone Park, 



Tweedy 633. 

 Poa scabrifolia Heller, Bull. Torrey Bot. Club 24: 310. 1897. Based on 



P. filifolia Vasey. 

 Poa spillmani Piper, Erythea 7: 102. 1899. Douglas County, Wash., 



Spillman in 1896. 

 Poa capillar if olia Scribn. and Williams, U.S.Dept.Agr., Div. Agrost. Circ. 9: 1. 



1899. California, Hansen 2614. 

 Poa cottoni Piper, Biol. Soc. Wash. Proc. IS: 146. 1905. Rattlesnake Moun- 

 tains, Yakima Countv, Wash., Cotton 557. 

 Poa nematophylla Rydb., Bull. Torrev Bot. Club 32: 606. 1905. Meeker, 



Colo., Osterhout 2601. 

 Poa scaberrima Rydb., Bull. Torrey Bot. Club 3(3: 534. 1909. Beaver 



Canvon, Idaho, Rydberg 2055. 

 (18) Poa cuspidata Nutt., in Barton, Compend. Fl. Phila. 1: 61. 1818. Based 



on P. pungens Nutt, 

 Aira trifiora Ell., Bot. S.C. and Ga. 1: 153. 1816. Not Poa triflora Gilib., 



1792. Athens, Ga., Green. 

 Poa brevifolia Muhl., Descr. Gram. 138. 1817. Not P. brevifolia DC, 1806. 



Pennsylvania. 

 Poa trinervata Willd.; Muhl., Descr. Gram. 138. 1817, as synonym of Poa 



brevifolia Muhl. 



