Grinnellia americana, Harv. 27 



Fig. 13. A surface-view of a young cystocarp showing the trichogyne [p) and 

 the apical cell (a) corresponding to a of Figs, ii and 12. x 220. 



Fig. 14. Transverse section of a young cystocarp borne on a proliferation. 

 tr, trichogyne. k, the knee-like projection at the base of the trichogyne. 



b, collection of Bacteria about the disintegrating apex of the trichogyne. a, the 

 carpogoniiim. fo, the open pore connecting the fertilized carpogonium with its 

 hypogynal cell, rf, the joint-thallus-cell which gives rise to the procarpium. 



c, cortical tissue in the pericarpic region of the young cystocarp. x 440. 



Fig. 15. Transverse section of a young cystocarp showing the joint-thallus-cell 

 {b) which gives rise to the procarpic branch, tr, twisted trichogyne. a, carpo- 

 gonium, au and a»', two auxiliary cells, x 440. 



Fig. 16. The group of five auxiliary cells which characterizes every young 

 cystocarp. p, pit-like connexions, a,, the thallus-cell which gives rise to the 

 procarpic branch and, subsequently to fertilization of the carpogonium, receives 

 its fertilized contents, nu, nucleus which appears distinctly in these cells, d, 

 daughter-cell from the central auxiliary cell {a). X 725. 



Fig. 17. Transverse section of " proliferation which bears a young cystocarp 

 having two trichogynes. b, a branched trichogyne. a, carpogonium. k, the 

 knee-like growth on the trichogyne tr. x 800. 



Fig. 18. Portion of a transverse section of a young cystocarp. a, central 

 auxiliary cell, i, 2, and 3, companion-auxiliary cells, d, daughter-cell producing 

 an ooblastema-filament and u papilla of densely protoplasmic cells from which 

 most of the ooblastema-filaments develop. The cleavage plane in these cells 

 of the papilla is very irregular, pi, protoplasmic pits connecting adjacent 

 sporiferous cells, sf, sterile filaments connecting the basal cortical portion 

 of the cystocarp to the inner branch-cells {sp) of the pericarp {pr). x 725. 



Fig. 19. An optical section of a proliferation which has a young cystocarp with 

 two trichogynes (Haematoxylin preparation), a and a', two antherozoids in 

 contact with the trichogyne. b, a strongly stained body in the protoplasmic 

 contents of the trichogyne. X440. 



Fig. 20. Transverse section of a young cystocarp in the plane mn of Fig. 16. 

 a., the joint-thallus-cell which bears the procarpium and receives the fertilized 

 contents of its carpogonium. c, an upper, and b, a lower daughter-cell of the 

 mother-cell (o). c has developed ooblastema-filaments sp. i and 2 are companion 

 auxiliary cells. X675. 



Fig. 2 1. Obliquely transverse section of a young cystocarp. a, central auxiliary 

 cell, d, the upper daughter-cell from the mother-cell (a), pa, the obliquely 

 developed papilla of cells from which the ooblastema-filaments develop, pi, 

 protoplasmic pit. sf, sterile filaments connecting the basal cortical region (c) of 

 the cystocarp with its pericarp {pr). X 800. 



Fig. 22. Transverse section of a partially mature cystocarp showing chains of 

 mature carpospores (cy) on one side and half mature {cf) on the other side. 

 sf, sterile filaments connecting the basal cortical tissue to the double-walled 

 pericarp, er, carpostome formed by the surrounding terminal cells of the peri- 

 carpial filaments. XI25. 



Fig. 23. Portion of the transverse section of the papillary cells with marginal 

 cells (»/) from which sporiferous filaments develop, c, young carpospore abstrict- 

 ing acropetally. p, protoplasmic pit. x 440. 



Fig. 24. Oblique section through the basal region of the cystocarp. a, central 



