MONOBLEPH ARID ALES 733 



figures shown by him in this paper and in van Tieghem's Traite de 

 Botanique, there seems little question that he had observed M. macrandra. 

 Lagerheim considered the species to be a variety of M. polymorpha, but 

 because of the position of the antheridium, its strong exsertion, and the 

 tendency of one or the other of the sex organs to be formed in groups 

 little chance exists of confusing this with others of the genus. Forms are 

 occasionally found, however, which produce antheridia approximating 

 those of the closely related M. sphaerica and M. hypogyna, and, rarely, 

 epigynous ones are observed. The determination of whether or not 

 these variations are due to hybridism, as has been suggested, awaits 

 further study. 



Monoblepharis laevis (Sparrow), stat. nov. 



(Fig. 53 G, p. 730) 



Monoblepharis macrandra var. laevis, Ann. Bot. London, 47: 531, pi. 20, 

 figs. 14-16. 1933. 



Thallus and reproductive organs like those of Monoblepharis ma- 

 crandra; oospore spherical, 25 \x in diameter, dark brown, smooth- 

 walled, contents bearing numerous globules. 



On rose fruits, Sparrow {he. cit.), twigs, Beneke (1948: 30), United 

 States; twig of Aesculus sp., Sparrow (1936a: 459), twigs of Quercus 

 robur, Fraxinus excelsior, Perrott (1955: 277, pi. 12, fig. 4, text-fig. 16), 

 Great Britain; twigs of Fraxinus sp., Sparrow (1936a: 459), Denmark. 



Monoblepharis polymorpha Cornu 



Bull. Soc. Bot. France, 18: 59. 1871 ; Ann. Sci. Nat. Bot., V, 15: 83, pi. 2, figs. 

 7-9. 1872; van Tieghem, Traite de Botanique (1874 ed.), fig. 

 167 B, 4 (sporangia), and fig. 167 C, 7 1-n, and 9. Paris 

 (Figs. 48 C-E, p. 700; 49 A-D, p. 704; 50, p. 708; 53 A-B, H, p. 730) 

 Monoblepharis brachyandra Lagerheim, Bih. Kgl. Svensk. Vetensk.-Ak. 

 Handk, 25, Afd. 3, No. 8: 37, pi. 1, figs. 1, 3, 5-10, 14-20, 35-45, 47, 

 52-53, 55-62, 64-66, pi. 2, figs. 6-10. 1900. 

 Monoblepharis brachyandra var. longicollis Lagerheim, loc. cit., p. 38, pi. 1, 



fig. 53, pi. 2, figs. 1-5. 1900. 



Mycelium filamentous, well developed, consisting of somewhat rigid 

 cylindrical rather frequently branched hyphae which, in their stouter, 



