Flff 48 L Z a 'Hays: nucellus a single row of cells, perlcaro much more developed than the testa. 

 II. Hordum juhatum: th\ck-wa.Ued sclerotic cells of glume with short trichomas above the caryopsls; 

 c remnant of nucellus III. Sori)hum vulgareT/a,T. communis (Andropogon. Sorghum, vnr.) : smull skleuroae 

 cells; si'uple spherical or elliutlcal starch grains. IV. Secale ccreale: large suherlcal or somewhat 

 elliptical starcL grains; nucellus a sirg-le row of cells: p pnrou-i thickened walls of pericarp. V. 

 Euchlcvna mexicana: starch grains solidly packed together. VI. Aveiia saliva: pericarp with irregular 

 cells on surface; the minute "down " of seed; a single row of ceils to aieurone layer; In VII same, 

 showing more than one row; starch grains compound. VIII Arrhenatlierum aveiiaceiun : aleurone layer 

 of two rows of cells; starch grains compound IX. Phleum praterwe; lower figure, general view cross 

 section of seed with emb'-yo In position. X. Poa prateiusis: large compound starch grains In endosperm. 



