in 
RYDBERG: 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. 
Fic. 3. Acrolasia albicaulis (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. 
Fic. 4. Mentzelia oligosperma Nutt. a, section of flower ; b, stamen ; ¢, pistil ; d, 
section of a part of the capsule, showing the broad placenta with the seeds removed, 
except one ; e, a Striate seed. 
Fic. 5. Synthyris reniformis (Dougl.) Benth. a, a flower ; b, sepal ; c, corolla 
laid open ; u, upper lip ; 1, lower lip ; d, pistil. 
Fic. 6. Besseya alpina (A. Gray) Rydb. a, b, etc., as in the preceding. 
