386 POACE^. 



This form is found only in cultivation in the temperate regions 

 of the world. See A. fatua for a reference to experiments showing 

 tliat common oats have been or may be derived from that species. 

 By cultivation and selection the grain has become larger, the awns 

 removed or much reduced, the hairs have left the florets, which are 

 often light in color. 



8. A. BREVis Roth, Tent. Fl. Germ. 1:40 (1788). 



A smaller species or race, with short spikelets, about 13 mm. 

 long, cultivated in mountainous districts of Europe, where the 

 seasons are cool and short. 



9. A. ORiENTALis Schreb. Spicil. 52. Tartarian Oats. A. 

 tartai'ica Ard. Saggi Ace. Padov. 2: t. 1, 101 (1789). A. miilate- 

 ralis Brouss. ex R. &. S. Syst. 2:669 (1817). 



This name is often applied to cultivated oats in which the pani- 

 cle is narrow and the spikelets turned to one side. 



10. A. NUDA L. Amoen. Acad. 3:40 (1759). A. CMnensis 

 Fisch. R. & S. Syst. 2:669 (1817). Bohemian Oats. Naked 

 Oats. Pilcorn. 



A smooth annual about 60 cm. high. Panicle 20-40 cm. long, 

 erect, spreading mainly in one direction. Spikelets 2-5-flowered, 

 the 2 lower florets separated 5-6 mm. by a long smooth internode 

 of tlie rachilla; empty glumes about 2 cm. long, 9- and 11 -nerved 

 respectively, much shorter than the spikelet; floral glume mem- 

 branous (not firm), 13-nerved, over 2 cm. long, often leaving the 

 ripened grain, awnless or with a short awn; palea 1.3 nmi. long, 2- 

 toothed, finely ciliate on the nerves. Grain hairy, easily escaping 

 from the ripe floral glume and palea. 



This is cultivated in China, and was at one time occasionally 

 raised in gardens as a curiosity. Numerous cases of swindling were 

 practiced by selling these oats to farmers of the northern United 

 States about 1885-8. 



79. (163). Arrhenatherum Beauv. Agrost. 55, t. 11, f. 5 

 (1812). 



Spikelets 2-flowered, in loose panicles, the lower floret stami- 

 nate, the upper perfect or pistillate, rachilla hairy, articulate below 

 the lower flower and produced into a short point or bristle above 



