1917] 
GATES—THE GENUS TRILLIUM oe FI 
Bishop, Irving T. Plant World 5: 11. 1902. 
A variety of 7. grandiflorum was noticed to be common 
near Buffalo, N. Y., students obtaining many specimens every 
spring. (This is evidently the var. variegatum). The petals 
become more or less green and bract-like, the leaf-blade 
smaller, and the petiole and peduncle become longer. In 
some cases the peduncle is longer than the rest of stem; in 
others, the petiole is 4—6 inches long, with a narrow lanceolate 
blade 3 inches long. Multiplieation of organs is common, ex- 
tending to petaloid and bract-like forms and also to the leaves. 
In T. erectum L., in few cases, the whorls are repeated, but 
in no ease is there lengthening of leaf- and flower-stem. 
Briteher, H. W. Variation in Trillium grandiflorum Salisb. 
Me. Agr. Exp. Sta. Bull. 86: 169-196. pl. 9-13. 1902. 
This is a careful study of the variation in the plants found 
in quantity near Syracuse, N. Y. Hundreds of thousands of 
plants grow there, thousands of them abnormal, perhaps 10 
per cent. In some spots barely a half-dozen are abnormal 
among thousands of plants; near-by 10-15 per cent may be 
abnormal. In typieal plants the petals vary from narrow and 
pointed to broad and obtuse, but always mucronate. 
An elaborate series of measurements is given for 185 plants, 
with notes on their peculiarities. In addition to the other con- 
ditions described, Britcher found that the petals, sepals, or 
ovary might be stalked. 
Only the range of these remarkable variations can be re- 
corded here. The petals varied in color ‘‘from typical white 
or pink, through white with green center stripe to solid 
green.’’ Green petals or portions of petals are usually per- 
sistent, gradually becoming purplish brown in color. The ab- 
normal plants have usually entirely disappeared by the time 
the carpels of the normal plants have attained their full size. 
This is interesting as showing that the abnormal forms do 
not reproduce themselves by seed and must therefore arise 
by repeated mutations from the normal forms. 
The stem may be wholly absent or as much as 34 em. in 
length. The leaves vary from sessile to petiolate with petioles 
