1888. | BOTANICAL GAZETTE. 229 
ber of bees. The spurs point upward more or less directly, 
so that, while bees have no difficulty in clinging to the flow- 
ers, butterflies, which prefer erect flowers, are put to consid- 
erable inconvenience, especially the Papilios, which gener- 
ally suck with their wings in motion. 
cause of a change of visitors in flowers oF shallow 
of Delphinium iricorne should become inverted, the bees, 
with more ease. pics 
he views expressed above may be summed up in the 
following propositions : ‘ 
a en shallow flowers become horizontal, insects 
light on the stamens and styles and prefer the upper nec- 
tary. | 
2. The stamens and styles bend to the lower side, and 
the lower nectaries abort. a 
gs Zygomorphous flowers of shallow origin are sterno- 
tribe, and have a single nectary present, or a central nectary 
more strongly developed or more accessible, on the upper 
Side 
4- Nototribe flowers of shallow origin are inverted. 
. en regular tubular flowers with included ee 
and styles become horizontal, insects land on the lower border 
and prefer the lower nectary. é d 
- The stamens and styles bend to the upper side, an 
the upper nectaries abort. sed 
7: Zy gomorphous flowers of deep gamopetalous oo 
4r€ nototribe and have a single nectary present, or a Oe the 
rectary more strongly developed or only accessible, on 
lower side, 
igin have 
.°- Sternotribe flowers of deep gamopetalous oes aya 
originally exserted stamens and styles (Lonicera), ; 
€come shallow (Scrophularia). : ‘ ference to a 
9. Irregular flowers were modified Migs: pa estan of 
a i . 
nage Place,3° and were modified throug 
Sects lighting upon them. scans 
SE aero nese ee 
ode, (2) Die Honigbehiilter sind auf derfenigen Seite der peo Ae fir die — 
befing oe h stiirker entwickelt, auf weleher sich die Auflieges Aufliegestelle (!) 
der ) Die Staubgefiisse wenden ihre Beutel mit den Oeffaangeel ten ee, Stellung sae! 
ohepeen zu; daher im zen auch den Honigbehiltern. 
Monigbehilter und der Befruchtungswerkzeuge in den Blumen, 54. 
