148 The Botanical Gazette. [April. 
the stigma, and is the only one who does not regard it of 
any advantage. According to Beal (18) a student, Penoyer, 
has proved by detailed experiment. that the flower is not self- 
pollinating. Foerste (25) observes that cross-pollination is not 
insured, and that the tubes are too long for the smaller bees. 
The flowers are violet purple, the yellow palate forming a 
path-finder. The stigma slightly exceeds the anthers. I have 
found the lower lobe of the stigma with its tip touching the 
pollen. But most of the stigmatic surface remains exposed 
and may be thoroughly dusted with pollen from another flower. 
The corolla tube measures about 19", but bees can insert 
their heads for about 5"", so that a tongue 14" long can ex- 
haust the nectar. The plants are frequent in wet places, the 
stems growing from 11 to 14™ high. The flowers were ob- 
served in bloom from July 11th to “September 7th. They are 
visited ag nectar by Bombus americanorum F. 9%. 
I US ALATUS Soland.—See Foerste (25).—This flower 
is also ee, to bumblebees. It resembles the preceding, 
but the palate is larger, paler, and more strongly bearded. 
The tube measures 18" long. Bees can insert their heads for 
about a and drain the tube with a proboscis 11™ long. Ss 
in M. ringens, the stigma finally touches the pollen and may 
be self-poilinated, but I am inclined to believe that the flow- 
ers are seldom neglected for a whole day, and are regularly 
cross-pollinated by bumblebees. The plants are not so tall 
as in M. ringens. They bloom from July 13th to Sept. 7th. 
The flower is visited for nectar Bombus americanorum F.%. 
On the pollination of Mimulus 
BG: AS a oe Anleitung zur Renotiiis der Gewdachse 1: 192, 274- 
2) Braconnot, Sur esto du stigmate des Mimulus. Ann. 
my Chia t de Phys. 29: 333-4. 1825.—(3) Vaucher, Histoire physi0- 
logique i Plates a Europe 3: 525. 1841.—{4) Delpi ne Sugli appa- 
recchi della fecondazione nelle piante ericciene e432, —(5) Hil- 
debrand, Mig iat ‘Sen P See s ert og n tiber die Bestaubungsein- 
richtungen b ei Bot. Zeit. a 284. 1867. J. glutinosus 
tungen tber die ee einiger Siieatn: Bot. Zeit. 28: 53-4 
1870. Sensitive stigma, etc.—(7) Delpino, Ulteriori osservazionl. Il. 
2: 151. 1873.—(8)- Miiller, Befruchtung der Blumen 283. 1873-—(9) 
Kitchener, On cross-fertilization as aided by cals motion in musk 
and Achimenes. Brae of Bot. Q: aes Am. Nat. 7: 478-80. 187 Ty 
4. Signi 
cance of ED stigma. Cit. by Dares (13).—(11) Heckel, 2 Du 
mouvement dans les stigmates bilobiés des Scrophularinées, des Big- 
noniacées et des Sésamées. Comptes Rendus 79: 702-4. 1874. Cit. by 
