BULLIFORM CELLS. 



19 



1°. Tlie loaves of Dactylis 

 (jldiiwrata (oroliartl grass or 

 cock's foot) have one median 

 band of bnlliforni eells. 



'1°, In f'fllon's petrtna and Fia. 23.— Cross-Hcction of part of a leaf or 



■' DactiilimihimeralaHhowina one band of l)ulli- 



ii i.i,^..„ ;, .^..r. ..-.wl.llr. form eel 8 on the upper side of the middle. 



otliers there is one imtltiie ^ ^ ;r (.sudworth). 

 band, and one or more on eacli side. 



',V\ Tlie leaves of Poa 

 pratensis (June grass) and 

 .some others have two band^;, 

 one each side of the middle. 



4°. l\\cix%Qoi Andropo(jon 

 sq uarrosum and otliers 

 there is one band each side fio. 24.-a tross-section of part of a leaf of 



Port j»a(f»iKi« (.June Krass) showint; one band of 

 of the middle and a small bulllform ceils each side of the middle. 1x75. 



— (Sudworth). 



one at each edge. 



Fio. 3.).— A portion of a cross section of a leaf ot P/i/eum prafed.sc (Timothy), show 

 ins bands of bulllform cells on each side the middle, and others between the veins, 

 1 X 20.— (Sudworth.) 



5*-\ The leaves of Phleum 2^ratenxe{^mot\\y), and many others 

 have one band of several shallow cells each side the middle, and 

 others between the veins. 



6°. The leaves of Zea mays (Indian corn), and many others, 

 have a band between each two primary bundles, and above each 

 tertiary bundle. 



