70 TJnivcrsihj of California Pnhlications in Bolamj | Voi.. 7 



Trillmm gTandiflorum uMichx.) Salisb. 

 This six'cics jippcars to he llic most hi<i^hly vari;ihk' of the nine 

 hero noted, as is indicated hy llie predominating numl)er oi" references 

 in the literature on teratology in the genus. Hritclu^r ni)02) lias 

 deserihed at some length the extraordinary sei'ies of aljnormal forms 

 wliieli occur near Syracuse. N(nv Yoi-k. He includes measurements 

 of such characters as "length of stem," "length of petiole," "size 

 of leaf blade," "length of peduncle," etc., together with notes upon 

 the more highly abnormal variations observed. Flower color was 

 found to vary for the petals from "typical white or piiil<, tlii-ough 

 white with green center stripe, to solid green." The following is 

 Britcher'.s condensed tabulation of the measurements on variation in 

 size of parts {loc. oil., \^. 106) : 



Lengtli of plant stem varies from U mm. to 340 mm. 



Leugth of petiole 160 



Width of leaf blade 22 124 



Length of leaf blade 30 157 



Length of peduncle 2 220 



Length of sepal stem 44 



Width of sepal blade 9 37 



Length of sepal blade 26 78 



Length of petal stem 64 



Width of petal blade 8 50 



Length of petal blade 18 80 



Length of filament 1 34 



Length of ovary 1 30 



Length of ovary stalk 23 



Length of style 2 27 



Length of anther 20 



Atkinson (1905) notes two teratological modifications. In the first 

 case the flower shows the "compound pistil expanded into three leaf- 

 like members." This in general corresponds to Britcher's plant 128: 

 "The place of the ovary is taken by three leaflike parts with stems 

 10 mm. and blades 5 by 14 nnn. in size. Within this circle are two 

 pollen-bearing stamens with filaments 4 and 7 nun. long and anthers 

 5 and 10 mm. long" (p. 174). Atkinson's second abnormality is not 

 noted by Britcher. who does not definitely describe any instance in 

 which all the parts of the perianth are strictly foliaceous or in which 

 a dui)lication of parts occurs. In this second case "the nine parts of 

 the perianth are green and the outei- whorls of stamens are expanded 

 into petal-like members." Prom the illustration there is obviously 

 an extra whorl of perianth segments; the outer whorl of expanded 



