WISCONSIN FLOWERS AND THEIR POLLINATION. 
By S. Graenicher. 
melanthace.^:, liliace.^: and convallariace.e. 
The plants dealt with in this paper belong to the order of 
Liliaceae as defined by Gray in his Manual of Botany, but accord- 
ing to the classification adopted by Britton and Brown they have 
been distributed among the three families named above. The 
genera are treated in the same sequence as they appear in 
"Britton's Manual of the Flora of the Northern States and 
Canada," and the same nomenclature has been adopted. 
Before considering the pollination of each species I shall out- 
line in advance some of the results obtained. 
An arrangement of the twenty-three species according to the 
order in which the flowers make their appearance furnishes the 
following list.* 
1. Trillium nivale, March 26 — April 27. 
2. Erythronium albidum, April 20 — May 15. 
3. Erythronium Americannm, April 25 — May 19. 
4. LVularia grandiflora, May 5 — June 5. 
5. Trillium grandiflorum, May 6 — June 3. 
6. Vagnera stellata. May 13 — June 8. 
7. Trillium recurvatum, May 15 — June i. 
8. Salomonia biflora, May 17 — June 10. 
9. Trillium erectum, May 19 — June i. 
10. Asparagus officinalis. May 20 — October i. 
11. Trillium cernuum. May 22 — May 27. 
12. Streptopus roseus, May 23 — June 7. 
*In cases of inisufficient observation the few dates on which the 
flowers were observed are given. 
1.-) 
