Gleasox : The pedunculate species of Trillium 389 



Petals none or abortive. 7. T. Smallii. 



Petals present. 



Anthers about equaling the filaments, 4-6.5 mm. 

 long. 



Anthers 2-3 times as long as the filaments, about 



8. T. Tsc/ionoskii. 



10 mm. long. 9. T. camsc hat cense 



Stigmas sessile, usually more than half as long as the ovary, slen- 

 der and of uniform diameter throughout, erect or spread- 

 ing, or somewhat recurved. 

 Ovary 3-lobed. 



Petals very narrow, less than half as wide as the sepals. 10. 7\ Govanianum. 

 Petals much broader than the sepals. 



Ovary tapering at the tip; peduncle exceeding the 

 leaves. 



Ovary truncate or rounded ; peduncle shorter than 



the leaves. 



II. T. rivah. 



Leaves oblong, actke. 12. T. nivaU. 



Leaves ovate, acuminate. 13. T. undnlaium. 



Ovary 6-angled. 



Filaments one-half to two- thirds as long as the anthers. 



Filaments equaling the anthers, or barely shorter than 



them. 



Stamens 15 mm. long or more ; stigmas straight or 

 nearly so. 



Stamens 13 mm. long or less ; stigmas more or less 



recurved. 



Stigmas united below into a shcrt straight style. 



Leaves narrowly elliptic ; peduncle erect ; stamens straight. 



14. T. Scouleri. 



15. T. grandiftorum 



16. T. ovatum. 



17. T. pusillu m . 

 Leaves broadly elliptic ; peduncle nodding ; stamens curved. 



Filaments equaling the anthers. 18. T. Catesbaei. 



Filaments much shorter than the anthers. 19. T. affine. 



1/1. Trillium declinatum (A. Gray) sp. nov. 



Trillium crcctum declinatum A. Gray, Man. ed. 5. 523. 1878. 



Stem stout, smooth, erect, 2-3.5 dm. high; leaves broadly 

 rhomboid, 8-12 cm. long and wide, narrowed at base, abruptly 

 short-acuminate ; peduncles horizontal or declined, 4-6 cm. long ; 

 petals ovate-oblong, white, 2-3.5 cm. long; filaments 2-5 mm. 

 long, 30-50 per cent, as long as the anthers, which are 5-12 mm. 

 long ; ovary white or with a tinge of pink, deeply 6-winged ; 

 stigmas sessile, stout, thick at the base, tapering gradually to the 

 recurved tip. 



Type locality : Ohio. 



Distribution : Ohio and southern Michigan to Missouri and 

 southern Minnesota. 



