— 67 — 



Fig. 36. A portion of a leaf protonema with aggregated branching. X 330. 

 „ 37. Protonema grown from leaf in the dark. x 195. 

 „ 38. „ „ „ „ „ „ light. x 195. 



„ 39. Portion of a protonema, and a bud grown from a leaf in the 

 dark. x 330. 



BBACHYTHECIUM RÜTABULUM. 



„ 40. Cells from the leaf base, with bud and rhizo-protonemä. x 330. 



LEPTOBBYUM PYBIFOBME. 



„ 41. Cells of a rhizoid grown from a leaf in the dark. x 195. 



,, 42. Continuation of the same filament after exposure to light 



showing a direct change to protonema. X 195. 

 „ 43. Protonema grown from a leaf axil, showing the formation of 



conidia-like cells by the lateral branches. x 195. 



Two of the separated protonema cells. x 330. 



Germination of two of these cells. x 195. 



Early stage in the formation of an axillary brood-body. x 195. 



Mature brood-body with is stalk. x 195. 



Protonema grown from the stem, and showing two lateral 



branches often Coming from a single cell of the main axis. x 80. 



49. Protonema with a brood-body, similar to those produced in the 

 leaf axil. x 195. 



PHASCUM CUSPIDJTUM. 



50. Leaf showing origin of protonema and the formation of a new 

 leafy shoot. x 40. 



51. Gross section of a leaf showing the origin of a protonema from 

 a cell of the ventral surface. x 330. 



52. Portion of a protonema with a bud. (d) Cells just above the 

 costa. x 330. 



FISSIDENS BRYOIDES. 



53. Bud grown from the leaf axil of a defoliated stem without 

 the intervention of a protonema. x 330. 



54. Rhizoid grown from a defoliated stem in the dark with per- 

 pendicular cross walls produced by intercallary growth. X 195. 



JJ 



44. 



»J 



45. 



11 



46 



J) 



47. 



JJ 



48, 



55. Various stages of Funaria spores germinated in the light (a). 

 After being in culture for 3 days. X 330. 



56. Spores of Funaria which germinated in the dark in a sugar 

 Solution, a & b. After being in culture for 3 days. x 330. 



5* 



