GRASS FAMILY. 

 , 



78. DUPONTIA R. Er. Parry's Voy. App. 290. ,874. 

 Low grasses, with flat leaves and generally narrow panicle*. Spikeleta >-**. 



flowers all perfect. Two lower scales empty, extending beyond the flowrrini 

 branous; flowering scales entire, membranous, with a tuft of ha Jnt at the feu 

 Styli-s distinct. Stigmas plumose. [Name in honor of J. D. Dupont, French botanist] 

 Two arctic species, both circumboreal. 



i. Dupontia Fisheri R. Br. Fisher's 

 Dupontia. (Fig. 481.) 



DupoH/ia Fisheri R. Br. Parry's Voy. App. 291. 



iS24. 



Smooth and glabrous, culms s'-ia' tall, erect, 

 simple. Sheaths overlapping; ligule i" long or 

 aves i / -6 / long, i"-2" wide, flat; panirh- 

 usually contracted, 1%'-^%^ long, the branches 

 less than i^ x long, erect, or sometimes ascend- 

 ing; spikelets few, about 2-flowered, 3 // -4 // long; 

 empty basal scales thin, generally acute, the first 

 l-nerved, somewhat shorter than the second, 

 which is usually 3-nerved, the lateral nerves 

 often vanishing at about the middle; flowering 

 scales 2^ // ~3 // long, i-nerved or obscurely 

 3-nerved; basal hairs about y 2 /f long. 



Arctic regions of northeastern America. Also in 

 arctic Europe and Asia. Summer. 



79. SCOLOCHLOA Link, Hort. Berol. i: 136. 1827. 



Tall aquatic or marsh grasses, with flat leaves and ample panicles. Spikelets a -4-flow- 

 ered, the flowers perfect. Two lower scales empty, thin-membranous, 3 -5-nerve<l; flowering 

 scales rigid, with a tuft of hairs at the base, rounded on the back, 5-7-nerved, some of the 

 nerves usually excurrent as short points; palets about equalling the scales, 2-nerraL Stamen* 

 3. Styles very short. Stigmas plumose. Grain hairy at the apex. [Greek, referring to the 

 rickle-like projecting nerves of the flowering scales.] 



Species 2, in the north temperate zones of both continents. 



i. Scolochloa festucacea (Willd.) 



Link. Fescue Scolochloa. 



(Fig. 482.) 



Arundo festucacea Willd. Knum. i: 



1809. 



Scolochloa festucacea Link. Hort. !t< 



1827. 



Graphepltxnnn ff*lucact*m A. Gray, Ana. Bo. 



Soc. Can. 1:57. l86 '- 



Culms 3-5 tall, erect, smooth and glahroo*. 

 Sheaths often overlapping; litf"!'' i" " toog: 

 leaves f-i long or more, 2 x/ -4" wide, flat, aca- 

 brous on the margins; panicle S'-i^ in length. 

 usually open, the branches ascending, naked at 

 the base, the lower 3'-4' long; spik- 

 long; empty basal scales acute, the fir* shorter 

 than the second; flowering scale* scabrous, 

 7-nerved. 



Iowa and Nebraska, north to Manitoba and A- 

 siniboia. July-Aug. 



