JAN. 1907. WISCONSIN FLOWERS AND THEIR POLLINATION. 
39 
the inner row has a furrow directed downwards to the nectary 
at the base, and such a cup-shaped nectary is also present at the 
base of each of the outer leaves, but without a furrow. The broad- 
ened filaments are closely appressed to their corresponding 
perianth-leaves, and for this reason the nectar of the three inner 
leaves can be reached only through a narrow tube 3 mm. in 
length. The six anthers in two rows are inclined towards the 
stvle, and dehiscence starts in those of the outer row. The three 
branches of the style surpass the anthers by at least 2 mm., and 
their stigmas are visible in the mouth of the flowers. This species 
seems to be slightly proterandrous since the papillse of the stigma 
do not become plainly developed until the pollen is being shed. 
There is a sweet odor and an abundant supply of nectar. In the 
older flowers a change of color to a more intense and darker 
red takes place. 
We have here an interesting example of an andromonoecious 
plant. In addition to the perfect (fertile) flowers just described 
there appear regularly somewhat smaller male flowers with nor- 
mally developed stamens and undeveloped pistils, but furnishing 
a full amount of nectar. About one-half of the flowers are male 
(sterile), and these are always situated along the apical portion 
of the stem, while the perfect flowers are below. For example in 
a large plant with three branches the distribution of flowers was. 
as follows : 
Lower branch 3 perfect 2 male 
Middle " 2 "3 " 
Upper " 5 "2 " 
In this specimen with seventeen flowers ten were perfect and' 
only seven male, but in some instances fully one-half are male. 
The only visitors seen on several occasions belonged to the 
same species of bee: Andrena mihmukeensis Graen, female. This^ 
bee is in the habit of collecting pollen on various flowers and is 
therefore not an oligotropic visitor of Streptopus roseiis. 
Salomonia biflora (Walt.) Britton. Hairy Solomon's Seal. 
The plants vary in height from about 5 to 8 dm., and are in 
blossom from May 17 to June 10. There are usually two, some- 
times three of the greenish-white tubular flowers hanging from 
the same pedicel. The length of the perianth is 10 to 12 mm., 
and in width the tube varies from 4 mm. in the region of the 
ovary to 3 mm. in the middle, and still less at the mouth. The 
