526 



COMPARATIVE MORPHOLOGY OF FUNGI 



In the Protomerulieae, the convolutions of Exidia become folds and 

 reticulations. In Protomerulius brasiliensis (Moller, 1895) and P. 

 Farlowii from New Hampshire (Burt, 1919, a) the reticulations gradu- 

 ally grow upwards, producing a tangle of tubes resembling the hymenium 

 of Merulius (Fig. 346). Bracket forms, somewhat resembling Auricu- 

 laria, are sometimes formed under favorable conditions. 



Similarly, the Tremellodonteae resemble the resupinate genera of the 

 Radulaceae, e.g., Tremellodon cartilagineum (Moller, 1895). In Proto- 



FlG. 



347. — Tremellodon cartilagineum. Habit. (X M; after Moller, 1895.) 



hydnum lividum, var. piceicola, Kuehner (1926) reports the usual nuclear 

 phenomena in the basidium and young basidiospores. In the highest 

 form, Tremellodon gelatinosum (T. crystallinum), the fructifications are 

 often laterally stipitate with teeth resembling those of the higher Radu- 

 laceae (Fig. 348). 



Hyaloriaceae. — This family is the angiocarpous homologue of the 

 Phleogenaceae and Gasteromycetes. The basidia arise irregularly within 

 the fructification, and are not united into hymenia. The only well-known 



