The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . Fig. no. Amarantus speciosus. Tri-radiate peaks of inflorescences. common, ordinary fasciations.^ The tip of the inflores-cence was not flattened, but tri- or sometimes quadri-radiate (Fig. 110). In Digitalis In tea I have observeda similar case, and in Celosia cristafa I found a good thus auuuus, see Paul Richter, Bcr d. d. hot. Gcs., 1890, Vol. VTTT,p. 231, PI. XVI. Ozcr de erfclyhhcld van fasciaticu, Botanisch Jaarboek, Gent,1894, P- 90. 498 The Inconstancy of Fasciatcd Races. instance of a
The mutation theory; experiments and observations on the origin of species in the vegetable kingdom . Fig. no. Amarantus speciosus. Tri-radiate peaks of inflorescences. common, ordinary fasciations.^ The tip of the inflores-cence was not flattened, but tri- or sometimes quadri-radiate (Fig. 110). In Digitalis In tea I have observeda similar case, and in Celosia cristafa I found a good thus auuuus, see Paul Richter, Bcr d. d. hot. Gcs., 1890, Vol. VTTT,p. 231, PI. XVI. Ozcr de erfclyhhcld van fasciaticu, Botanisch Jaarboek, Gent,1894, P- 90. 498 The Inconstancy of Fasciatcd Races. instance of a quadri-radiate apex on a branched indi-vidual (1893). Tri-radiate fasciated heads have oftenbeen found in Composites; for instance in Chrysanthe-niiun LcucantJiennim, HcUanthns annuus and ErigcronhcUidiflorus. In the latter species these have occurredwith tolerable frequency in my garden. All these casesare greatly in need of a closer investigation. For the production of a fasciation the presence of theinternal factor is not of itself sufficient. Favorable con-ditions of life are also quite nece
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