PANK'E.K. 145 



the neuter floret equiil, tlie foriner 7-nerved, the hitter 9-nerved; 

 fourth glume ([uilea of tlie neuter iloret) ohovute, '.) mm. long, 

 Avitli ii long ciillous base ; ui)per floret shining, smooth, oval, sub- 

 acute, ^.T) mm. long. 



Mexico (Jalisco), />rin(/le i:;}3. 



r;{. p. Walter! I'oir. Lam. Envycl. Suppl. 4:282 (1810). 



J'. latifoUuiii Walt. Fl. Car. 73 (1788), not Jj., teste Swartz. 



I'orennial, fi'om tufted rootstocks. Culms sniooth, erect, simple 

 orsparingly branching, 30-70 cm. high. Leal'-blades ll-lS-nerved, 

 (»-lI cm. long. 2-3.5 cm. wide, ovate-lanceolate or oblong-lanceolate, 

 rather abru[)tlv' taper-pointed, the base cordate-clasping, mostly 

 smooth (.'xcei)t the throat, margins near the base, and lower end 

 of the sheath near the nodes, which are villous. Panicle simple, 

 usually exserted, often on a long ])ednncle: rays spreading, 7-12 

 cm. long. S[)ikelets often downy, obovate, 3-4 mm. long (mostly 

 3.5); first glume 1-nerved, 1 mm. or moic long, second !)-13- 

 nerved ; lower floret staminate, floral glume 7-1 ;{-nerved, its palea but 

 little shorter: fertile floret elliptical, subacute. 2.5-3.3 mm. long. 



Much like /'. claiide.sli/nitii. but blades more tajjeriiig below the 

 middle, tapering more abruptly, with concave margins above, 

 mostly shorter and wider. 



A plant from Dr. Vasey, collected at Washington, ]).C., 

 I8S4, marked '* typical "" has hairy sheaths, blades 10 cm. by 2 cm., 

 panicles snudi, branches stout. Spikelets 4 mm. long. 



Michigan, /it'dl 2\, A ns/i/i ; Ma>*sachusetts, Benl 22; New York, 

 Jical 23 ; M innesota, Uolztxticr ;}2 : District of Columl)ia, Mr('(ii't/ii/. 



Fouiul from New England to 'I'cxas. 



Var. molle Vasey. Contrib. V. S. \at. Tlerl). 3:33 (1802). 

 Smaller, more slender, soft velvety-pubescent throughout. District 

 of Columbia, Vnseif for U. S. Dept. Agricul. 



Vinfinia to Louisiana. 



27. (;») ICHNANTHUS Heauv. Agrost. 50, f. 12,/. 1 (1812). Xa- 

 viciihirid Uaddi. Agrost. Hras. 38 (1823). 



Spikelets ovate or acuminate, short-pedicellate on the branches 

 of the panicle, with one perfect terminal flower and a lateral stami- 

 nate flower. 



