1917] 
GATES—THE GENUS TRILLIUM 47 
abruptly pointed, petals apparently greenish yellow and 
smaller (19 mm. Х 9 mm.), anthers pale, and stem apparently 
purple. Study of further specimens will probably show this 
to be a distinct thing. In the blotching of the leaves and in 
the color of the petals it resembles 7. viride. 
Thus, although T. luteum has a very limited range, it evi- 
dently contains a considerable number of intererossing races 
or variations showing unit differences. 
8. T. viridescens Nutt. Trans. Am. Phil. бос. П. 5: 155. 
1837. 
T. sessile var. Nuttallii Wats. Proc. Am. Acad. 14: 273. 
1879. 
T. sessile var. viridescens Trelease, Rept. Ark. Geol. Surv., 
1888. 4:225. 1891. 
This species agrees with T. viride chiefly in its pubescence 
and narrow petals. It may have originated independently 
from another member of the sessile group. From Т. viride 
it differs most markedly in its larger size, its acuminate leaves, 
and its mostly purple or red petals. 
On hillsides and in rich copses, Kansas and Arkansas. 
9. T. viride Beck, Am. Jour. Sci. 11: 178. 1826. 
This plant is distinct in many features, especially the linear 
or linear-elliptie, purplish green, clawed petals, and the ob- 
long to ovate, relatively small, 3-5-nerved leaves mottled with 
whitish spots. The stem is rough-pubescent at the top, and 
the leaves more or less pubescent on the veining beneath. It 
is considered to be most nearly related to T. recurvatum. 
In woods, Missouri to North Carolina, Alabama, and Miss- 
issippi. 
10. T. Ludovicianum Harb. Biltm. Bot. Studies 1: 23. 1901. 
According to Harbison, this species is nearest T'. viride and 
T. lanceolatum. From the former it is separated chiefly by 
its smooth stem, and from the latter by its shorter stem, 
broader leaves and sepals, shorter filaments, and straight 
anthers. 
