58 



GRAMINACEAE 



Festuca — Fescue Grass 



(Lat. festuca, stem, straw) 



1. Leaves narrow and involute; lemma awned F. ovina: sheep's fescue 



2. Leaves flat; lemma not awned F. nutans: nodding 



fescue grass 

 Eragrostis — Eragrostis 



(Gr. era, ground, agrostis, grass, from the spreading habit) 



1. Perennial, reddish; branches of panicle long and stiff E. pectindcea 



2. Annual ; branches shorter 



a. Spikelets 2-8 mm. long E. pildsa 



b. Spikelets 5-16 mm. long E. megastdchya 



HORDEAE BARLEY OR RYE TRIBE 



1. Spikelets 1 at each joint of the zigzag axis 



a. Spikelets with edge turned towards the axis 



b. Spikelets with flat side turned towards axis 



(1) Native perennials 



(2) Cultivated annuals 



(a) Spikelets 2-several-flowered, glumes broadly ovate 



(b) Spikelets 2-flowered, glumes acute 



2. Spikelets 2-several (sometimes 1 or more rudimentary) at each joint of 



the zigzag axis 



a. Spikelets 1-flowered, in 3's at each joint, the lateral reduced 



b. Spikelets 2-6 flowered 



(1) Spikelets ascending, glumes about the same size as lemmas 



(2) Spikelets spreading horizontally, glumes very small or lacking 



' 



A single introduced species 



Lolium — Darnel 



(Lat. name of the darnel) 



Agropyrum — Wheat Grass 



(Gr. agros, field, pyros, wheat) 



1. Stems tufted, no creeping rootstocks or stolons; lemma awned 



a. Awn about twice the length of the lemma; spike thick 



b. Awn shorter than the lemma ; spike slender 



2. Stems solitary or few, from creeping rootstocks ; lemma mostly awnless 



or awn-pointed 



Triticum — Wheat 



(The Latin name) 



1. Grain remaining within the glumes when ripe 



2. Grain easily falling out when ripe 



Secale — Rye 



(NL. from seco, cut) 

 A single cultivated species 



Hordeum — Barley 



(Lat. name of the barley) 



1. Cultivated; glumes short, not awn-like 



2. Native weed ; glumes long and awn-like 



filymus — Rye Grass. Wild Rye 



(Gr. elymos, a kind of grass, from elyo, roll up) 



1. Sprke erect, awns shorter than the spikelet 



2. Spike more or less nodding, awns longer than spikelet 

 a. Glumes narrowly awl-shaped ; spike slender 



Lolium 



Agropyrum 



Triticum 

 Secale 



Hordeum 



Elymus 

 Hystrix 



L. perenne: common 

 darnel 



A. Richardsonii 

 A. tenerum 



A. re pens: quackgrass, 

 couch grass 



T. spt'lta: spelt 

 T. vulgdre: common 

 ■wheat 



S. cereale 



II. vulgdre: barley 

 H. jubdtum: squirrel-tail 

 grass 



E. virginicus 

 E. stridtus 



