Scrophulariaceae and Orobanchaceae 169 



of the ovary which projects to the front, and it is stored in the 

 bottom of the corolla tube. In all the species examined by the 

 writer the nectary agrees with this description, but further, it 

 is curved inward at the top and points directly toward the ovary 

 as a tongue-like process. 



In Bartsia alpina the nectar is secreted by a cushion-like 

 swelling at the lower side of the base of the ovary, extending a 

 little beyond as a rounded knob. 



Lathraea squamaria has a large, roundly triangular and some- 

 what lobed nectary situated at the base of the ovary. 



In L. clandestina the ovary is laterally compressed and tra- 

 versed bv a longitudinal groove, bearing in front a three-lobed 

 nectary. 



One species of Orobanche, crenata, "secretes nectar at the 

 orange-yellow base of the ovary." 



The nectary of Aphyllon is a small, rounded, whitish swelling 

 at the base and a little to one side of the ovary. 



In Epiphegus the nectary appears as a swelling on one side 

 of the ovarv, antero-laterally in position, just above the base. 



The nectary of Conopholis is a rudimentary ovarian gland. 



The Seeds 



The seeds vary in number from 4 in one capsule of some gen- 

 era of the Scrophulariaceae, (Melampyrum, Rhinanthus) to very 

 numerous (as many as 1500 in one capsule) in other genera of 

 Scrophulariaceae and Orobanchaceae. Increase in seed number 

 is usually accompanied by a reduction in size, so that the seeds 

 become very small in such genera as Epiphegus and Aphyllon. 

 In structural details, the seeds of the purely parasitic genera are 

 simplified and most degraded; in some of them the embryo con- 

 sists of a small group of undifferentiated cells {Aphyllon, Epi- 

 phegus.) 



To supplement the writer's information, gathered from his 

 own examination of material, Bentham and Hooker's "Genera 

 Plantarum" (32, pp. 967-980) was used as the chief source for 

 genera of Scrophulariaceae. 



The seeds of Rhinanthus are few in number, sub-orbicular, 

 compressed, and surrounded by a wing-like structure. The 

 embryo is small. 



Melampyrum has from 2 to 4 seeds which are smooth, and have 

 an aril-like appendage at the base. 



