102 Trans. Acad. Sci. of St. Louis. 
As far as observed the flowers of Teucrium are adapted to 
bees, and most of the species specially to bumble-bees, as 
shown in the following table. In some of the species the tube 
is so Shortened as to admit mid-length or even short-tongued 
bees. 
: e) #124 
eee eee 
s | a" |) ba | ae 
e) 4% |p 
a) co) on | & 
Teucrium Scorodonia—Low Germany— ote 6 5 1 9-10 
'yrenees—Mac AAS 3 
Chamedrys — Alps — Mii ler.......... ox S 1 1 | 7-10 
Pyr wages = MacLeod. . 2 
Pyren 4 . 
tout ues Alps —Miille 6 1 1 6 
Scordium — Low "Germany — Miiller ee a 4 
ee 2 eons 
Canklense — Iinois er sre iver ~ d Bi feces 6 
Mentha Canadensis L.— The plant is common in wet places, 
The stem rises from five to ten dm., is much branched and 
bears in the axils of the leaves numerous whorls, each with 
many white flowers, whose lobes are faintly marked with 
purplish. 
The flower has a form much as in Lycopus, the cleft 
upper lip appearing as an almost equal lobe of a four-lobed 
corolla. The slight irregularity has little significance, except 
as a trace of a former condition, for insects land indefinitely 
upon the flower clusters, approach the separate flowers from 
every side and receive the pollen on different parts of their 
bodies. 
The plant is gynodiccious. The hermaphrodite flowers are 
proterandrous. They expand about 3 by 5 mm., measure 9 
or 6 mm. in length, the tube being about 3mm. The anthers 
are exserted from 3 to 4 mm., the receptive stigma 5 mm. 
The female flower expands 3 or 4 mm., measures 4 or 5 mm. 
in length, the tube being about 3 mm. long. The anthers are 
imperfect and are included. The ee is exserted about 2 mm. 
*# In thatahl +h 2 ATS317 ee taken 
from his ~hiapemst ne = Flowers and Weitere Beobachtungen tier: » het ccna ae 
Blumen durch ; those in pone resis from his Alpenblumen, ihre Befrachtang 
durch renin na 
ting door Tnsedten, Gent, 189. 
Me EA eee 
Pee Ra NER SED © EP SNS A oat aa 
