The Genus Riccardia in Chile. 



165 



like the simple secondary branches just described, and between these 

 and the longest primary branches are many intermediate conditions. 

 The ultimate branches of whatever rank are usually four cells thick 

 in the median portion. Their wings are rarely more than three 



Figure 8 



A, B. Riccardia TENERRiMA (Steph.). Evans 

 A. Part of sterile thallus, x 5. Transverse section of axis, x 100. 

 The figures v\^ere botli drawn from the type material of Aneura tenerrima. 



C. Riccardia diversiflora Evans 

 C. Part of thallus with two male, three female and two bisexual 

 branches of different types, x 5. The figure was drawn from the type 

 material. 



cells wide and are crenulate from projecting cells, but less mark- 

 edly so than in R. autoica. The surface-cells of the ultimate 

 branches deviate slightly in size from those of the axis, the median 

 cells being mostly 40-70 /a long and 35 /* wide, while the marginal 

 average 35 [x in length and measure 20-30 (x in width. 



