GKAMINEAE 31 



and spreading : spikelets 2 // -4 // long, linear-oblong : flowering glumes 

 with prominent lateral nerves. Common in dry soil, especially on sand- 

 bars along the Missouri River. June-October. 



4. E. Frankii Steud. Strongly tufted and much branched through- 

 out, y-\V high : leaves 2 / -5 / long : panicle 2 / -6 / long, l'-2' wide: 

 spikelets \"-\\ f/ long. Often common in damp sandy fields along 

 rivers. June-October. 



5. E. capillaris (L.) Nees. Erect, 8M8' tall, branching only at 

 base: leaves 3 / -8 / long: sheaths smooth or hairy: panicles often 1 

 long and 6' wide with widely spreading capillary branches : spikelets 

 somewhat terete, V f -\\' f long. Common in dry soil throughout. A 

 form with most of the spikelets 1-flowered occurs south of Grain Valley. 

 July-Septem ber. 



6. E. trichodes (Nutt.) Nash. 2-4 high, with long, narrow 

 usually smooth leaves : panicle narrow and elongated, sparingly bearded 

 in the lower axils, 1 or more long, 3 / -4 / wide, its branches ascending 

 and capillary, somewhat flexuous : spikelets 2 /x long. Sandy grounds 

 in Rush Bottom near Courtney. Local and uncommon. July-Septem- 

 ber. 



7. E. pectinacea (Michx.) Steud. l-2 high, with the panicle 

 taking up two-thirds of the plant : leaves about 6' long : sheaths hairy : 

 panicle 8' or more long, 6 / or more wide, strongly bearded in the axils, 

 its branches spreading : spikelets 2 // -4 // long, on pedicels at least 

 their length. Frequent in sandy fields and prairies and adventized 

 along railroads. July-September. 



40. EATONIA Raf. 



Spikelets small, about 2-fiowered, in contracted panicles. Two lower 

 glumes empty, very dissimilar, the first acute, linear, keeled and 

 1-uerved, the second strongly obovate, rounded or acute at the apex, 

 3-nerved. Flowering glumes narrower, obtuse, keeled. Palet small and 

 hyaline, 2-nerved. 



Panicle branches narrowly linear and loosely 



flowered. 1. E. Pennsylvanica. 



Panicle branches short and thick, closely flowered. 2. E. obtusata. 



1. E. Pennsylvanica (DC.) A. Gray. U-3 high, with numerous 

 flat leaves, 2 / -6 / long : panicle narrow, slender and loosely flowered, 

 3 / -12 / long, its branches short. Often common in rich moist woods, 

 especially in the northern part. May- June. 



2. E. obtusata (Michx.) A. Gray. Very erect, l-2 high, growing 

 in small clumps : leaves 3'-5' long, sharp-pointed : panicle 2'-4' long, 

 densely flowered and spike-like, but interrupted at base : branches 1' or 

 less long, erect. Common in dry soil throughout, in woods and on 

 prairies. May-June. 



