RvDBERG : Some Generic Segregations 281 



lateral view one half of two placentae with seeds, between them the horizontal lamellae 

 and behind the vertical wings ; between the latter are seen seeds on the third placenta ; 

 f, a seed. 



Fig. 3. Acrolasia alhiiaulis (Dougl.) Rydb. a, section of flower; b, petal ; c, 

 Stamens ; d, pistil ; e, capsule ; f , longitudinal section of the same showing the narrow 

 filiform placenta with seeds removed ; g, a muricate prismatic seed. 



Fig. 4. Mentzelia oligosperma Nutt. a, section of flower ; b, stamen ; c, pistil ; d, 

 section of a part of the capsule, showing the broad placenta with the seeds removed, 

 except one ; e, a striate seed. 



Fig. 5. Synthyris reniformis (Dougl.) Henth. a, a flower ; b, sepal ; c, corolla 

 laid open ; u, upper lip ; 1, lower lip ; d, pistil. 



Fig. 6. Besseya alpina (A. Gray) Rydb. a, b, etc., as in the preceding. 



