58 



White. 



types. 



it occurs as the usual type form as would appear to be true in certain 

 legumes. 



According- to an earlier, but somewhat more detailed system of 

 classification (Godron 1871 — 72), fasciations were grouped on the basis 

 of the special part of the plant which they altered. In some fasciated 

 plants, the inflorescence is often entirely inhibited (e. g. Oenothera 

 biennis L.), while in others no modification of this structure may take 

 place. In this manner, Godron sorted out six different morphological 

 Recent physiological studies on this anomaly have shown, 

 however, that all of these types may occur 

 within the same species or even on the 

 same plant. 



In order to understand thoroughly 

 the nature of the changes caused through 

 fasciation, a somewhat detailed descrip- 

 tion of the monstrous variations produced 

 in the different plant organs is ne- 

 cessary. Those structures which caU for 

 special attention are roots, underground 

 stems, main stems, branches, leaves, in- 

 florescence, flowers, fruit, and incidently, 

 seedlings. 



Roots. Braun (Worsdell, 1905) 

 described fan -shaped aerial roots in the 

 cactus, Epiphylium hookeri. J. C. 

 Costerus and J. J. Smith, Jr. (1896) 

 mention the same anomaly in Saccolabium 

 hlumei (Orchidaceae). Other orchids in which anomalous roots have been 

 observed, are Aerides crispum and Phalaenopsis schilleriana (Gard. Chron. 

 1874, p. 703) (Fig. 2). In the former, the roots are usually contracted 

 into flattened masses, irregularly plaited, and give rise to contorted 

 ramifications. 



Underground stems. Fasciations of these structures occur in 

 Spiraea sorbifolia (de Vries, M. T. 2, 1910, p. 505), Solanum tuberosum 

 (Gard. Chron. 1885, pp. 80—81) and Oxalis crcnata "Oka" (Hus, 1906). 

 In the latter case the tubers transmitted the character. 



Main stem. This is the plant structure most commonly altered 

 by fasciation. The variation in form this takes has been adequately 

 described in the preceding pages and in a former paper (White 1913). 



Fig. 2. Fasciated potato (Photo- 

 graphed from an drawing in the 

 Gardener's Chronicle). 



