630 



BOTANY or CROP PLANTS 



the end. The anthers are sagittate at the base. The style 

 branches are slender. The achenes are oval, oblong, or 

 linear, flat, three to five-ribbed on each face, narrowed above 

 or contracted into a narrow beak which bears a large number 



Fig. 256. — Cutting or cut-leafed lettuce, var. intybacea. (After Corbell.) 



of soft, capillary, white or brown pappus bristles. The 

 achenes vary in color: whitish, blackish, yellowish, or 

 brownish. 



Origin, and Geographical. — It is qmte generally conceded 

 by botanists that our garden lettuce {L. sativa) is originated 

 from the wild species, L. scariola. This latter species grows 



