1 68 Boeshore — The Morphological Continuity of 



In Rhinanthus the hairs are numerous from the stigma down- 

 ward but decrease in number toward the base of the style and 

 finally disappear. They consist of one cell pointed at the dis- 

 tal end on the upper part of the style, and of 2 to 3 cells on the 

 lower part of the style, and are broad at the base, tapering grad- 

 ually toward the tip. 



In Bartsia alpina the numerous one- to several-celled hairs 

 are distributed along the entire style and the upper half of the 

 ovarian surface, being most numerous on the ovary. They are 

 quite long and needle-like in appearance. 



In Bellardia they are exceedingly numerous along the entire 

 stylar surface, and consist of one needle-like cell that is dark in 

 color. 



In Orobanche coerulea the glandular type of hair is seen along 

 the entire style, similar to the hairs found on other parts of the 

 plant already described. 



The style and ovary in the genera Aphyllon, Epiphegus and 

 Conopholis are glabrous, although the stigmatic areas of the first 

 two mentioned are covered with comparatively short unicellu- 

 lar hairs. 



The Nectary 



The nectarv of Scrophulariaceae is described by Wettstein 

 (30, p. 39) as hypogynous, ring formed or one-sided. Beck (31, 

 p. 127) gives a similar description for Orobanchaceae. "Nektar 

 absondernden Stellen am Grunde der Stf. oder am Grunde des 

 Frkn. ringformige, oft buckelig, seltener beutelformig vorspring- 

 ende Nektarien. " For Gesneraceae Fritsch describes the nectary 

 as a "Discus" usuallv well developed, ring to cup-shaped, or as 

 reduced isolated glands, which may be also one-sided. While 

 these general descriptions fairly agree in the three families, most- 

 ly one-sided nectaries are characteristic of parasitic Scrophulari- 

 aceae and Orobanchaceae, as will now be taken up. 



In Melampyrum pratense "the nectary expands toward the 

 lower lip into a whitish rounded body, on either side of which 

 runs a nectar-secreting groove." 



In M. lineare the nectary consists of a similarly rounded body 

 placed to one side of the ovary. 



The general description of the nectary for Rhinanthus is given 

 by Knuth. He says that nectar is secreted by the fleshy base 



