1918] The Grasses of Illinois 393 



This native species is found in woods and shady places. It is easily 

 distinguished from P. palufitris by its broader spikelets and short 

 ligule. 



ILLINOIS SPECIMENS: Without locality, Vaseij; southern Illinois, Lapham. 

 CHAMPAIGN CO. Urbana, Clinton, May, 1900; Urbana, Gleason, June, 1900. DU 

 PAGE CO. Hinsdale, Smith, June, 1903. fulton co. Without locality, Pepoon; 

 ( 'anton, Wolf, macon CO. Without locality, Clokey 2444. Marshall co. Steu- 

 l)en township. F. H. Chose 1796. JO daviess co. Without locality, Pepoon. 

 MENARD CO. Athens, Hall, June, 1864. PEORIA CO. Peoria, Brendel; Peoria, Mc- 

 Donald, June, 1900. piatt co. White Heath, Mosher, May, 1915. stark fo. 

 Wady Petra, F. H.' Chase 1429. vermilion co. Muncie, Mosher, May, 1914. 

 Av abash CO. Without locality, Shearer; Mt. Carmel, SchnecJc, May, 1880; Hang- 

 ing Rock, Schneck, May, 1905; Hurd's Ferry, Schneck, July, 1900. 



Poa wolfii Scribn. 

 (Fig. 238) 



• 



Culms slender, smooth, 1 to 3 feet tall; sheaths smooth; blades 

 mostly clustered at the base, 1 to 8 inches long, 2 mm. or less in width; 

 panicle open, branches very slender, usually ascending ; spikelets 2- to 

 4-flo\vered, 5 to 6 ilim. long ; lemmas 4 mm. long, copiously webbed at 

 base, nerves all prominent, the lateral and midnerves pubescent for 

 more than half their length, the intermediate nerves smooth. 



Illinois is the type locality for this species, which was named after 

 one of its earlier collectors, J. Wolf. The plant is comparatively rare. 



ILLINOIS specimens : Without locality. Wolf in 1883. fulton CO. Without 

 locality, Brendel in 1860; Copperas Creek, Wolf, June, 1883. Henderson co. 

 Oquawka, Patterson, peoria co. Peoria, Brendel. 



The following species of Poa have been reported from Illinois, but 

 no authentic specimens have been found as yet. 



Poa hrncliyphylla Schult. — This was reported as P. hrevifolia by 

 Lapham ('57,' 546, 578), Flagg ('78, 281), and Higlcy and Raddin 

 ('!)1, 145). 



Poa ncmoralis L. — This species was reported by Lapham ( '57, 546, 

 579 ; Plate 2, Fig. 12), who says it is a native both. of this country and 

 Europe. It seems probable that he did not have the species as it is 

 understood at present. 



Poa frivkilis L. — Flagg ( '78, 281) cites this as occurring in Illinois, 

 having been introduced from Europe. It is probable that it was cul- 

 tivated here for only a short time. 



55. PANICULARIA Fabr. 

 ]\[anna Grass 



These grasses are all found in moist situations. They are perennials 

 with flat leaves and terminal panicles. The ligules arc membranous. 

 The spikelets are 3- to 15-flowered; the lemmas usuall}^ very prom- 

 iiiently nerved, with a narrow, transparent margin. The glumes are 

 unequal and much shorter than the spikelets. 



