476 Durand : Classification of the Fleshy Pezizineae 



Macropodia pubida B. & C. PI. 28, Fig. 3 



The Macropodias are stipitate plants with hemispherical brown 

 cups which are clothed externally with velvety brown pili. In 

 M. pubida the sterile layers make up about one half of the total 

 thickness of the apothecium, at least at the sides of the cup. The 

 excipulum and hypothecium are quite well differentiated, and are 

 of about equal thickness. The excipulum is composed of rather 

 large pseudo-parenchymatous cells with thick walls which are 

 elongated somewhat toward the outside of the cup. They measure 

 30—40 fj. in length. The ental cells of the excipulum are smaller 

 and nearly isodiametric, 8— io,u in diameter. They grade off into 

 the thin-walled cells of the hypothecium. The hairs which make 

 up the pubescence are simply produced excipular cells. 



The hypothecium is thick and composed of small cells, 8-10/^ 

 long, which are more or less elongated in a direction parallel to 

 the surface of the cup. The cells of the medullary region of the 

 stem are of the same character as those of the hypothecium. 



SARCOSCYPHA 



In this genus are included several interesting and pretty species 

 growing usually on dead wood. The cups are stipitate and bright- 

 colored within, usually of some shade of orange or scarlet. They 

 are clothed externally with floccose hairs. 



S. occidentals (Schw.) Sacc. 



The structure of this plant is strictly Pezizaceous. The hypo- 

 thecium and excipulum are not well differentiated, but grade into 

 each other. The whole medullary portion of the cup is made up 

 of a pseudo-parenchyma, composed of small, somewhat elongated 

 flexuose cells, 6-8 }i in diameter, which are united into a close 

 compact tissue. At the surface, the cells are larger, fully 15-25 ,« 

 in diameter, and are compacted into a layer which continues up- 

 ward so as to form the margin of the cup. 



S. floccosa (Schw.) Sacc. 



very 



of closely interwoven threads just beneath the hymenium. The 

 medullary portion of the stem is made up of very closely com- 



