Grinnellia americana , Harv. 27 
Fig. 13. A surface-view of a young cystocarp showing the trichogyne (t) and 
the apical cell (a) corresponding to a of Figs, n 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 
'carpogonium. po, the open pore connecting the fertilized carpogonium with its 
hypogynal cell. d, the joint-thallus-cell which gives rise to the procarpium. 
c y 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 au x , two auxiliary cells, x 440. 
Fig. 16. Tne 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 a 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. 1, 2, and 3, companion-auxiliary cells, d, daughter-cell producing 
an ooblastema-filament and a 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 1 , 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 inn 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 (a), c has developed ooblastema-filaments sp. 1 and 2 are companion 
auxiliary cells. X575. 
Fig. 21. 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 (cy 1 ) on the other side. 
sf, sterile filaments connecting the basal cortical tissue to the double-walled 
pericarp, cr , carpostome formed by the surrounding terminal cells of the peri- 
carpial filaments, x 125. 
Fig. 23. Portion of the transverse section of the papillary cells with marginal 
cells (m) from which sporiferous filaments develop, c, young carpospore abstract- 
ing acropetally. p, protoplasmic pit. x 440. 
Fig. 24. Oblique section through the basal region of the cystocarp. a, central 
