The induction, development, and heritability of fasciations . I. —OENOTHERA HYBRID. Fasciations developed from a bifurcated —OENOTHERA BIENNIS. Grooved stem with fasciation —OENOTHERA CRUCIATA. Ring —OENOTHERA BIENNIS. Fasciated rosette. (See also text figure.) INDUCTION, DEVELOPMENT, AND HERITABILITY OF FASCIATIONS. 9 capsules of O. grandiflora are Mompha brevhntclla, known at one time asLaverna cenot/iercevorella, and in May and ag-ain in July the insects areconstantly invading- the tips. The slightest irregularity in the arrangementof the young leaves during o
The induction, development, and heritability of fasciations . I. —OENOTHERA HYBRID. Fasciations developed from a bifurcated —OENOTHERA BIENNIS. Grooved stem with fasciation —OENOTHERA CRUCIATA. Ring —OENOTHERA BIENNIS. Fasciated rosette. (See also text figure.) INDUCTION, DEVELOPMENT, AND HERITABILITY OF FASCIATIONS. 9 capsules of O. grandiflora are Mompha brevhntclla, known at one time asLaverna cenot/iercevorella, and in May and ag-ain in July the insects areconstantly invading- the tips. The slightest irregularity in the arrangementof the young leaves during or just preceding the flowering period, anappearance like that shown in plate iii, fig. 2, or such as might result fromsome external mechanical interference, indicates that the tip when sectionedwill prove to be fasciated or bifurcated. There is no sign externally of thefasciated outline in these tiny tips, merely reddish color, inequality ofdevelopment, or a tiny aperture suggesting a callus. Microscopical exam-ination proves and p
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