37 

 studied by Tre]ease, Behrens and others. Trelease has 

 divided n^^fir glg^Hp jut o floraj ^ and extra-ftoral. Floral: 

 ^H gceptac J,", pjptili qtamqjifi ^corolla, and calyx. Extra-floral : 

 Calyx, ordinary bracts, specialized bracts, involucre, ped. 

 uncle, and leaf. The order Ranunculaceae is interesting as 

 regards the secretion of nectar. Some flowers are anern- 

 ophilous and without nectar, as meadow rue (7%atorMm(^w«c- 

 M/w), etc. mi buttercup (Ranunculus flammula) the honey is 

 secreted by little scales at the base of the petals. J In Ranun- 

 culus auricomus the honey glands are at the base of the pet- 

 als. (In the pasque flower {Anemontf patens y ar Nuttalliana) 

 honey is secreted by rudimentary stamens!* In a species of 

 clematis {Atragene atpina) honey is secreted by the basal half 

 of the filament. In marsh marigold (Caltha paJustris) honey 

 is secreted by the pistils. In the coluiabine {Aquilegia Can- 

 adensis) the honey is secreted by a fleshy thickening in the 

 extreme point of the spur of the petal)^ In larkspur {Delph- 

 inium azureum) the honey is secreted by the two upper pet- 

 als which are inclosed by the spurred upper sepal. In Acon- 

 itum napellus the two posterior petals are developed into nec- 

 taries. (In Salvia and other labiates^the nectar is secreted by 

 a disc-shaped gland under the pistil^In borage (Borrago offi- 

 cinalis) it is secreted by the fleshy base of the pistiT\ This 

 is retained by a short tube formed by the bases of the stam- 

 ens. In toad flax (Linaria vularis) the honey is secreted 

 by a prominent enlargement at the base of the ovary. After 

 the honey is secreted it passes down a smooth, narrow groove 

 which is lined by short, stiff hairs, and thence to the tip of 

 the spur. "^ 



C Odors in flowers are due largely to the 

 Odors of Flowers. ^ j- i. u ^ n 



preseoce or nectar, but some flowers 



have odors without nectar. I A bunch of hepaticas often prp- 



