[Vor. 4 
44 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
after year indicate that such a rootstock developed from a 
seed in which a definite germinal change had taken place. The 
occurrence of double flowers, which was formerly supposed to 
be a result of cultivation, is now known as a variation in many 
wild species. 
Unless otherwise mentioned, the specimens examined are 
from the herbarium of the Missouri Botanical Garden where 
most of the work was done. 
KEY TO MAP 
1. T.discolor Wray 16a. T. erectum var. album (Michx.) 
2. T.stamineum Harb. Pursh 
9 —T қ. decum bens Harb. 16b. T. erectum var. viridiflorum Hook. 
4. sessile L. 17. T.Vaseyi Harb. 
5. T.Underwoodii Small 18. T. Rugelii Rendle 
6. Й . Hugeri Small 19. Т. simile Gleason 
rd г. Р. luteum (Muhl.) Harb. 20-45 D: (Gray) Gleason 
Та. би var. latipetalum Gates, 21. . cernuu 
22. Т, undulatum "Willd. 
8. viden. Nutt. 23. T. Scouleri Rydb. 
9. T.viride Beck 94. T. plates ia as (Miehx.) — 
10. Ж Ludovicianum Harb. 24a. Т. gran ndiflorun & var. trans. varie- 
11. 7. lanceolatum Boykin ех Wats. gatum ith 
Па. Т. lanceolatum var. rectistam- 24b. T. Аена Md var. trans. parvum 
4 Ga 
19. T.recurvatum Вес 25. Т. iia Pu n 
13. T. petiolatum Pursh 25a. T. ovatum trans. var. stenose- 
14. T.giganteum (Hook. & Arn.) palum Gates, n, var. 
Heller 26. Т. nivale Riddell 
14a. T. giganteum хат. chloropetalum 97. T.rivale Wats. 
(Torr.) Gates, comb. nov. 28. T.Catesbaei ЕП. 
14b. T. giganteum var. em 29. T.affine Rendle 
(Torr.) Gates, comb. 30. Т.теповит Gates, n. sp. 
15. Т. pusillum Mi chx 31. T. obovatum Pursh 
16. T,erectum L. 
TRILLIUM L. 
1. Trillium discolor Wray, in Curt. Bot. Mag. pl. 3097. 
1831. 
T. sessile var. Wrayi. Wats. Proc. Am. Acad. 14: 273. 1879. 
This peculiar species is mainly distinguished from the 
other species of the T. sessile group by its very obtuse, 
broadly spatulate petals (one ecd apieulate), which are 
pale sulphur-yellow inclining to green. 
In pine woods, South Сайда. North Carolina, and 
Georgia. Rare. 
2. T. stamineum Harb. Biltm. Bot. Studies 1:23. 1901. 
