No. 84. 



POA THURBERIANA (<X Ktzc.) Vasey; Paniculariti Thurhrriann O. Ktze. 



Rev. Geii. I'l. ii. 78.3 (1801). 



Plani perennial, pale gi-een tliroiigliont, tufted; roots fibrous. 



Ciilnis ereet, clothed at the ba.se with scarious sheaths, leafy to the panicle, L' to .3 

 feet tall. 



Leaves from the base numerous, with smooth, striate sheaths 3 to 5 inches long, and 

 slender, scabiid l)l;i(lcs, coiidiiiiliratc nr lnosely involute, 1 line wide and 4 to 12 inches 

 h>u<i: leaves of llie ciiliii usually l ; slieatlis striate, smooth, close, ojieii above, exceed- 

 ing the long interuodcs; blades ;{ to inches long; ligule subacute, wider than the 

 blaile, decurrent, - lines loii};-. 



ftillonsrencf an erect, narrow, contracted panicle G to 12 inches long; rays mostly 

 in fwos or threes at the 10 to 15 nodes, scabrid like the axis, erect, spikelet-bearing 

 nearly to the base, or the loiter ones naked below. 



tSjtihihtu small, li to 2 lines lon.ii, with (jiie perfect floret and a rather largo rudi- 

 ment, or 2 florets and a very small rudiment; empty glumes ovate, subacute, thin, 

 nearly smooth, the first 1-nerved, 1 line long, the second .3 nerved below and j line 

 longer than the first, each about )\ as long as the adjacent flctrcts; floral gluni(! broadly 

 lance-oblong, minutely erose at the obtuse or rounded, membranaceous aiH'x, nearly 

 smooth, 5-nerved, li lines long; ])alet ])uberuleiit on the 2 keels, about C(iualing the 

 glumes; stamens .S, with short filaments and included anthers; stigmas snuill, sessile. 



Plate LXXXIV; «, spikelet with 2 perfect flowers and a ludiment; h. floret and 

 nuliment of 1 -flowered s])ikelet; c, first eni])ty glume; </, second empty glume; c, floral 

 glume:./, palet inclosing the ovary, ventral view. 



California, in wet meadows in the valleys of the Sierra Nevada, California. De- 

 scribed in r>ot. Cal. ii. .'510 as Atiopi.s piiiicijlora. and changed l)y Otto Kiintze, 

 Rev. den. IM. ii. 1X3, to I'dniciilaria ThHrhcrUma. It is ])lain to me, however, that 

 this and some other species which are i)laced in Atrojris by I'rof Thurber iuBot. Cal., 

 are true /We and .should be restored to that genus. Dr. Kuntze's name was given on 

 the sii|i|)osition that it was an vl/»vy>/.9, which he thinks is pro])erly called I'(iniruhtri<i: 

 and as the specific name had already been approi)riated in that genus, it was neces- 

 sary to adoi)t another. As the name pauciflora has been emidoyed for a Poa by 

 Itirnier and Sclinltes, it would seem that Kuntze's name should be adopted for the 

 species under I'oa. 



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