476 BOTANICAL GAZETTE [December 



a fringe of projecting toothlike or clawlike cells. The perithecia 

 often occur solitary, when they are seen to be clearly sphaeriaceous 

 in character. Often there are two (fig. 6), more rarely three, lying 

 together. Such considered by themselves might be regarded as 

 dothideaceous. The fungus appears to be clearly sphaeriaceous, 

 and owing to the peculiar character of the pseudoparenchyma I 

 propose it as a new genus. 



Desmotascus, gen. nov. — Mycelium and perithecium black, 

 sphaeriaceous, ostiolate, short-beaked. Asci with an inter- 

 ascicular pseudoparenchyma, 8-spored. Spores nearly hyaline, 

 I -celled. 



It differs from Phomatospora in the character of the interascicular pseudo- 

 parenchyma. Name from Secr/AWTr^s, prisoner. The type is the following: 



Desmotascus portoricensis, sp. nov. — ^Mycelium dark, vary- 

 ing in diameter from 4 to 17 ^t. Perithecia 1 19-190 ix wide, 85 n 

 high, black, roughly spherical, solitary or in groups of two or three, 

 immersed papillate or short-beaked, ostiolate. Asci 8-spored, 

 oblong, obtuse, thickened at apex, 50-85X17 m- No paraphyses, 

 but the perithecial cavity filled by a pseudoparenchyma. Asco- 

 spores oblong, somewhat irregular, 20-31X8. 5-10 /x, pale straw- 

 colored. 



On Bromelia pinguin, Mayaguez, 964 (type); 964-1 type slide. 



University of Illinois 

 Urbana, III. 



EXPLANATION OF PLATE XXX 



Fig. I. — Ostiole with mycelium entering and disorganizing the tissue. 



Fig. 2. — ^Whole interior of perithecium Med with pseudoparenchyma 

 ih.p.). 



Fig. 3. — Perithecium with asci, showing origin from various parts of base 

 of perithecium. 



Fig. 4. — Showing asci shrunk away from interascicular pseudoparenchyma 

 {h. p.). 



Fig. 5. — Showing variation in size and shape of internal mycelium {h. p.). 



Fig. 6. — Two perithecia showing beaks (/. p.). 



Fig. 7. — ^Ascus and spores Qi. p.). 



