. Dedication papers : scientific papers presented at the dedication of the laboratory building and plant houses, April 19-21, 1917. (301) (302) Fig. 3.—tenuis. (303) (304) Fig. 4.—simplex. Ftgs. 1-4. Climax leaves from eight rosettes representing the four phenotypes inpedigree No. 15406. Meter is and rhomboidea possess one or more B factors; te^iuisand simplex lack them. SHULL: DUPLICATION OF A LEAF-LOBE FACTOR 429 Australia, Tasmania, India, Ceylon, South Africa, the Sahara, andfrom widely distributed points in Europe and North America, and findthat the forms everywhere fall into one or more
. Dedication papers : scientific papers presented at the dedication of the laboratory building and plant houses, April 19-21, 1917. (301) (302) Fig. 3.—tenuis. (303) (304) Fig. 4.—simplex. Ftgs. 1-4. Climax leaves from eight rosettes representing the four phenotypes inpedigree No. 15406. Meter is and rhomboidea possess one or more B factors; te^iuisand simplex lack them. SHULL: DUPLICATION OF A LEAF-LOBE FACTOR 429 Australia, Tasmania, India, Ceylon, South Africa, the Sahara, andfrom widely distributed points in Europe and North America, and findthat the forms everywhere fall into one or more of these four rosettetypes. This does not mean, however, that with respect to leaf-formthere are only four biotypes of this species in existence, for nearlyevery lot of material from a new locality presents minor details oflobing which lead to their easy recognition as new and distinct biotypes. In all of the earlier crosses between types respectively dominantand recessive for either of the above-mentioned character-pairs, thereappeared in the F2 close approximations to the monohybrid ratio,3:1, or undoubted modifications
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1918
