MO NOBLEPH ARID ALES 131 



Resembling var. fasciculata in everything but its larger size. Since 

 both varieties were found on the same twig, environmental factors 

 (except nutrition) are ruled out as a reason for size. 



Monoblepharis insignis var. insignis Thaxter 



Bot. Gaz., 20: 438, pi. 29, figs. 1-7. 1895 

 (Fig. 54 A, p. 738) 



Diblepharis insignis (Thaxter) Lagerheim, Bih. Kgl. Svensk. Vetensk.-Ak. 

 Handl., 25, Afd. 3, No. 8:40. 1900. 



Hyphae straight, rigid, hyaline or very pale reddish brown, nearly 

 cylindrical 1.5-2.5 mm. in length by 9-16 \x in diameter, rarely branched; 

 antheridia broad, subcorneal to subcylindrical, straight or slightly 

 curved, the rounded tip often bent slightly inward, nearly symmetrical, 

 epigynous and to one side of the oogonial beak, 9-13 \i in diameter at 

 the base, tapering distally, 20-27 u, long, bearing four to six uniflagellate 

 antherozoids 5-6 by 3-5 [x; oogonia single and terminal or in series of 

 two to eight in basipetal succession, occasionally intercalary, cylindrical 

 or irregular in shape, with a prominent lateral straight or slightly curved 

 beak, which is often as long as the antheridium, 39-54 \i long by 25-35 u. 

 in diameter: oospores broadly ellipsoidal, spherical or irregular, 30-45 u. 

 long by 22-33 ;o. in diameter, the wall smooth and golden brown or 

 amber brown ; zoosporangia long cylindrical, the same diameter as their 

 concomitant hyphae; zoospores posteriorly uniflagellate. 



On submerged twigs in pools and ditches. Thaxter (F.) (be. cit.), R. 

 M. Johns (comm.) (North Carolina), Benjamin (comm.) (Massachu- 

 setts), United States; Thomas [Perrott] (1939: 124, figs. II, III), twigs 

 of Quercus robur, Perrott (1955: 261, figs. 5-6), Great Britain. 



True zoosporangia and zoospores of this species have been observed 

 by R. M. Johns (comm.). 



Monoblepharis insignis var. minor Perrott 



Trans. Brit. Mycol. Soc, 38: 263, pi. 10, text fig. 7. 1955 



"Mycelium well developed consisting of straight, rigid, cylindrical, 



hyaline, sometimes tinged with brown, vacuolated hyphae, which are 



simple or branch sympodially. Each hypha bears one oogonium or a 



