MANUAL OF THE GRASSES OF THE UNITED STATES 



937 



Oryzopsis fimbriata Hemsl., Biol. Centr. 



Amer. Bot. 3: 538. 1885. Based on 



Stipa fimbriata H. B. K. 

 Oryzopsis seleri Pilger, Verh. Bot. Ver. 



Brand. 51: 192. 1909. Guatemala, 



Seler 3238. 

 Piptochaetium fimbriatum var. confine I. 



M. Johnston, Arnold Arb. Jour. 24: 396. 



1943. Coahuila, Mexico, Johnston and 



Mutter 486. 



(10) PLEUROPOGON R. Br. 



(1) Pleuropogort californicus (Nees) Benth. 

 ex Vasey, Grasses U. S. 40. 1883. 

 Based on Lophochlaena calif ornica Nees. 



Lophochlaena californica Nees, Ann. Nat. 

 Hist. 1: 283. 1838. California [Doug- 

 las]. 



Pleuropogon douglasii Trin. ex Steud., 

 Norn. Bot. ed. 2. 2: 355. 1841. Name 

 only, North America. 



Lepitoma brevifolia Torr. ex Steud., Nom. 

 Bot. ed. 2. 2: 355. 1841, as synonym 

 of Pleuropogon douglasii Trin. 



(4) Pleuropogon davyi Benson, Amer. Jour. 

 Bot. 28: 360. 1941. Kelseyville, Calif., 

 Benson 3666. 



(3) Pleuropogon hooverianus (Benson) J. 

 T. Howell, West. Bot. Leaflets 4: 247. 

 1946. Based on P. refractus var. hooveri- 

 anus Benson. 

 Pleuropogon refractus var. hooverianus 

 Benson, Amer. Jour. Bot. 28: 360. 

 1941. Mendocino County, Calif., Davy 

 6626. 



(5) Pleuropogon oregonus Chase, Wash. 



Acad. Sci. Jour. 28: 52. f. 1. 1938. 

 Union, Oreg., Leckenby in 1901. 



(2) Pleuropogon refractus (A. Gray) Benth. 

 ex Vasey, Grasses U. S. 40. 1883. 

 Based on Lophochlaena refracta A. 

 Gray. 



Lophochlaena refracta A. Gray, Amer. 

 Acad. Sci. Proc. 8: 409. 1872. Oregon 

 [HallQSQ], 



(12) POA L. 



(45) Poa alpina L., Sp. PI. 67. 1753. 



Lapland. 

 Uralepis mutica Fourn., Mex. PI. 2: 110. 

 1886. Not U. mutica Fourn. ex Hemsl. 

 1885. Mexico, Liebmann 611. 

 Poa alpina var. minor Scribn. in Beal, 

 Grasses N. Amer. 2: 543. 1896. Not 

 P. alpina var. minor Koch, 1837. Mon- 

 tana, Scribner [388] in 1883. 

 (25) Poa alsodes A. Gray, Man. ed. 2. 562. 

 1856. New England to Wisconsin. 

 [Type, New Hampshire.] 

 Poa dinantha Wood, Class-book eC. 

 1861. 797. 1861. Montgomery, Ala. 

 This species was described as Poa nemor- 

 alis L., in Torr., Fl. North, and Mid. U. S. 

 1: 111. 1823. 



(69) Poa ampla Merr., Rhodora 4: 145. 

 1902. Steptoe, Wash., G. R. Vasey 3009. 



Poa laeviculmis Williams, Bot. Gaz. 36: 

 55. 1903. Several specimens from 

 Washington and Oregon mentioned, the 

 first being Steptoe, Wash., G. R. Vasey 

 3026. 



Poa truncata Rydb., Torrey Bot. Club 

 Bui. 32: 607. 1905. Dillon, Colo., 

 Clements 373. 



Poa confusa Rydb., Torrey Bot. Club 

 Bui. 32: 607. 1905. Medicine Bow 

 Mountains, Wyo., Nelson 7787. 

 (5) Poa annua L., Sp. PI. 68. 1753. Europe. 



Aira pumila Pursh, Fl. Amer. Sept. 1: 76. 

 1814. Pennsylvania. 



Poa infirma H. B. K., Nov. Gen. et Sp. 1: 

 158. 1816. Colombia, Humboldt and 

 Bonpland. 



Megastachya infirma Roem. and Schult., 

 Syst. Veg. 2: 585. 1817. Based on Poa 

 infirma H. B. K. 



Catabrosa pumila Roem. and Schult., 

 Syst. Veg. 2: 696. 1817. Based on 

 Aira pumila Pursh. 



Poa aestivalis Presl, Rel. Haenk. 1: 272. 

 1830. Peru, Haenke. 



Eragrostis infirma Steud., Nom. Bot. ed. 

 2. 1: 563. 1840. Based on Poa infirma 

 H. B. K. 



Poa annua var. aquatica Aschers., Fl. 

 Prov. Brandenb. 1: 844. 1864. Ger- 

 many. 



Poa annua var. rigidiuscula L. H. Dewey, 

 U. S. Natl. Herb. Contrib. 3: 262. 

 1895. Nez Perce County, Idaho, Sand- 

 berg 134. 

 (7) Poa arachnifera Torr. in Marcy, Expl. 

 Red Riv. 301. 1853. Headwaters of 

 the Trinity River [Ark., Marcy Exped.]. 



Poa densiflora Buckl., Acad. Nat. Sci. 

 Phila. Proc. 1862: 96. 1862. Northern 

 Texas. 



Poa arachnifera var. glabrata Vasey, 

 Grasses U. S. Descr. Cat. 79. 1885, 

 name only, [for staminate plants with 

 glabrous spikelets]; Vasey ex Beal, 

 Grasses N. Amer. 2: 535. 1896. [Texas, 

 Buckley in 1881.] 



Poa glabrescens Nash in Small, Fl. South- 

 east. U. S. 154, 1327. 1903. Based on 

 P. arachnifera var. glabrata Torr. (error 

 for Vasey). 

 (22) Poa arctica R. Br., Sup. App. Parry's 

 Voy. 288 (err. typ. 188). 1823. Mel- 

 ville Island, Arctic America, Parry. 



Poa grayana Vasey, U. S. Natl. Herb. 

 Contrib. 1: 272. 1893. Grays Peak, 

 Colo., Patterson 14 in 1885. 



Poa laxa occidentalis Vasey ex Rydb. and 

 Shear, U. S. Dept. Agr., Div. Agrost. 

 Bui. 5: 32. 1897. Name only, for Shear 

 690 and Rydberg 2440, Grays Peak, 

 Colo. 



Poa longipila Nash in Rydb., N. Y. Bot. 

 Gard. Mem. 1: 46. 1900. Electric 

 Peak, Yellowstone Park, Rydberg 3614. 



Poa alpicola Nash in Rydb., N. Y. Bot. 

 Gard. Mem. 1: 47. 1900. Based on P. 



