The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . Fig- 33- Chrysanthemum se-gefiim t>lcnum. One ofthe six inflorescenceswhich in 1899 first exhib-ited true doubHng. Thefigure represents the par-ent plant of the doublevariety. 184 Observation of the Origin of Varieties. the midst of the tubuhir llorets (Fig. 34A) Hgulate floretsare developed (Fig. 34B). If the doubhng is carriedvery far the former are completely covered by the latter(Fig. 34C), and can only be seen by pulling out theligulate florets or by turning them aside. If this is done
The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . Fig- 33- Chrysanthemum se-gefiim t>lcnum. One ofthe six inflorescenceswhich in 1899 first exhib-ited true doubHng. Thefigure represents the par-ent plant of the doublevariety. 184 Observation of the Origin of Varieties. the midst of the tubuhir llorets (Fig. 34A) Hgulate floretsare developed (Fig. 34B). If the doubhng is carriedvery far the former are completely covered by the latter(Fig. 34C), and can only be seen by pulling out theligulate florets or by turning them aside. If this is donea large number (and not merely a few scattered ones, asmight perhaps be expected) of tubular yellow corollas. Fi<? 34. Chrysanthemum inodorum plcnissimum. A, in-Horescence with central disc of tube tlorets (fertile) ;B, with scattered tongue-florets in the disc (half fer-tile) ; C, highest degree of doubling (sterile). are ordinarily found; and the less the amount of doublingthe more conspicuous they are. Moreover we often find,in both species, inflorescences with a broad yellow discover which occasional white ligulate florets are scattered(Fig. 34B). Such flowerheads look like anomalies,though, as a matter of fact, they are less anomalousthan the apparently completely double forms. The Origin of Clirysaiitlicmiiiii Scgcluiii Ploiiini. 185 This 66-rayed plant was the first of my race to betraythe fact that it contained the much desired double char-acter. From this moment the attainment of my objectwas assured. The six first double inflorescences referred to, hadabout 40-50 ray-florets around their circumference andmoreover one to three in the disc. But as they floweredtoo late to ripen see
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