The pistillate flowers lack both sepals and petals (fig. 6). They consist only 

 of pistils, each subtended by two bracts, which enlarge and enclose the fruit as it 

 t matures. The margins and surfaces of the bracts are highly variable among the different 



|; Atriplex species (fig. 7). 



It. 



Figure 6. — A single pistillate flower of fourwing salthush. Note the swollen ovary and 



the two slender styles (X20). 



B 



J 



D 



H 



G 



LABORATORY APPARATUS FURNITURE 



SCIENTIFIC INSTRUMENTS & CHEMICAIS 



l"i"ii!!ili|i|lii'li!i[|iii'limlintliiiiliii'liiiiliiHl^^ 



Figure 7. — Comparison of typical chenopod utricles. Note bract variation. 

 canescens, (h) A. confertifolia, (c) A. corrugata, (d) A. cuneata, (e) A. 

 (f) A. obovata, (g) A. canescens x A. confertifolia, (h) A. canescens x A, 



(a) Atriplex 

 gardneri , 

 gardneri , 



(i) Ceratoides lanata, (j) Grayia brandegei , (k) G. spinosa, 

 vestita, (m) K. prostrata, (yi) Sarcobatus vermiculatus . 



(I) Kochia americana 



5 



