Identifier: mutantshybridsof00macd (find matches)
Title: Mutants and hybrids of the oenotheras
Year: 1905 (1900s)
Authors: MacDougal, Daniel Trembly, 1865-1958 Vail, Anna Murray Shull, George Harrison, 1874-1954 Small, John Kunkel, 1869-1938
Subjects: Plant hybridization Oenothera Plants -- Variation
Publisher: Washington, D.C., Carnegie Institution
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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vergence. This is partly due to the unusual reddish color presentin the leaves and stems. A third type, No. 2.24 (PI. XVII, fig. 5), was characterized bythe combination of parental qualities in such manner as to constituteintermediates. The characters of the form, size, and structure of thestems and leaves made a mosaic of modifications from both parents, inwhich it would be difficult to assign greater importance to one overthe other. The hypanthium exhibited a length greater than that ofeither parent, while the ovary was less pubescent than either. Theamount of red color present in the stems and branches was muchgreater than that of either parent and is only duplicated among someof the related species of the genus. The form and structure of the bracts and the crinkling of theleaves were transmitted unchanged to the individual; the size andform of the petals were intermediate, and the relative length of thecalyx-segments and hypanthium of biennis were found. It was notable PLATE XVUI.
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Onagra gigas. leaf from middle of main stem ; 2, leaf from main stem ; 3, bract from one of the lowermost flowers ;4, flower with petals removed ; 5, petal; 6, leaf from lower part of rosette five months old ; 7, leaffrom upper part of rosette five months old ; 8, capsules. 1,2, 3, 4, 5, and 8, five-eighths natural size;6 and 7. one-fourth natural size. MUTANTS AND HYBRIDS OF THE OENOTHERAS. 27 that the spread of foliar surfaces and the density of arrangement ofthe leaves was similar to lamarckiana, while the form, incisions in themargin, and arrangement at apices of branches were similar to biennis.In the same manner the capsule was nearly glabrous, but was foundto be distinctly four-angled. A fourth type, No. 2.2 7, bore flowers not easily distinguishable fromthe pollen-parent, being capable of self-fertilization, but with the partsof the flower of greater size. From the other parent the unequal growthof the leaves, which results in the crinkling of the laminae is shownwith a modifi

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