TWENTY-SEVENTH ANNUAL MEETING. 139 



ARISTIDA L. Spec. PI. 82 (1753); Gen. PL, h.u. 5: 35 (1754). Includes only 

 one species, A. adscensionls. 



A. basiramea Engelm. Vasey in Bot. Gaz. 9: 76 (1884). Pottawatomie, 

 Riley, Saline, Kingman. 



A. dispersa Trin. & Rupr. Mem. Acad. St. Petersb., Ser. VI, 5: 129 (1842). 

 Five varieties are referred to this: "(a) A. nana Steud., from Chile; (b) A. 

 humilis HBK., from Venezuela; (c) A. bromoides HBK., from Ecuador; (d) A. 

 coarctata HBK., from Mexico; (e) A. nigrescens Presl, from Mexico." Clark 

 county, collected by Mr. M. A. Carleton. 



A. fasciculata Torr. Ann. Lye. N. Y. 2: 154 (1826). "Culm filiform, erect, 

 branched; leaves narrow, flat, smooth; panicle elongated, sub-spiked; flowers 

 fasciculate; calyx shorter than the corolla; awns nearly equal, spreading, 

 longer than the flower. Description. — Culm two feet and more in height, 

 smooth, terete, with short branches, slightly geniculate. Leaves long, very 

 narrow, almost filiform at the extremity. Sheaths smooth. Stipule a 

 bearded ring. Panicle 6-8 inches long, erect, many^-flowered; flowers pur- 

 plish, closely approximate' on the extremities of the branches. Calyx two- 

 glumed; glumes very unequal, linear lanceolate, acute, carinate, the inferior 

 much shorter than the corolla, superior about as long as the corolla. Corolla 

 on a short bearded stipe, two-valved, subcylindric, scabrous; inferior valve 

 involute, half an inch long; awns longer than the flower, spreading, filiform, 

 scabrous. Stamens three; anthers purplish. Germen linear, elongated; stig- 

 mas plumose. Hab. — In forests of the Canadian river. This species is nearly 

 allied to A. purpurascens of Poiret, but is distinguished by its branched culm. 

 Its short calyx, and by its shorter awns." Professor Scribner refers the fol- 

 lowing to this species: Aristida purpurea Nutt. Fl. Ark. in Trans. Am. Phil. 

 Sec, V, 145 (1837). "Panicula erectiuscula gracili; cal. valvulis remotis aris- 

 tulatis apice bifidis; aristis capillaribus longissimis; foliis brevibus scabris. 

 Hab. — On the grassy plains of Red river, in arid situations. Flowering in 

 May. Obs. — Perennial; leaves narrow, short and scabrous; ligula pilose; 

 culm about one foot high; panicle many-flowered, a little spreading, branches 

 capillary; flowers commonly in pairs (after the manner of the genus), bluish 

 purple; one valve of the calyx nearly double the length of the other, both 

 bifid at the summit and shortly awned, the longer valve exceeding the corolla; 

 awns equl, capillary, nearly three times the length of the corolla and sca- 

 brous; corolla minutely stipitate." Plains; east to Riley, Saline, Barber. 

 . A well marked form is referred to A. fasciculata by Professor Scribner, 

 A. purpurea fendleriana Vasey. Mon. Grasses, 46 (1892). Aristida fendler- 

 iana Steud. PI. Gram. Suppl. 420 (1855). "Caespitosa glaucescens; culmis 

 erectis rigidulis simplicibus glabris (pedalibus et ultra); vaginis laevibus ore 

 pilis aliquot tenuissimis minutis; ligula brevissima villosula vel nulla; foliis 

 convoluto-teretibus rigidulis suberectis vel curvatis retrorsum scabriusculis 

 ceterum glabris; panicula simplicissima racemosa (3-4 pollicari); radiis soli- 

 tariis usque ternis uni-trifloris; glumis 2, valde inaequalibus acutis pallidis, 

 inferiore duplo, breviore, superiore apice bifida aequante vel parum superante 

 flosculum fere 4-lineatem basi glabrum sursum glabriusculum, brevi stipi- 

 tatum, stipite albo-pilosulo: setis scabriusculis, intermedia breviore. Coll. 

 Fendler, Nr. 973, New Mexico. [P. 135 post, Nr. 30. Aristida glauca insere.]" 

 Seward county, Mr. M. A. Carleton. 



A. humboldtiana Trin. & Rupr. Mem. Acad. St. Petrsb. Ser. VI, 5: 118 

 (1842). In regione subfrigida regni Mexicani inter Salamanca, Guanaxuato et 

 Ovexeras, altitud. 5400—6600 ped. Haskell county. 



