8o THE SAPROLEGXIACEAE 



Found by us twice, first near Southport, N. C, in a ditch with algae 

 April 6, 1918; again from a little pond near Trenton, N. C, February 24, 

 1922 (Mrs. Matherly, coll.). Reported from Michigan by Kauffman (I.e.). 



Humphrey described his species from Trelease's notes and ma- 

 terial and never saw the living plant. He describes the oogonia as 

 having rather scattered blunt outgrowths and no pits. Our plant has 

 such outgrowths on only a part of the oogonia and very conspicuous 

 pits, but these apparent discrepancies do not weigh very heavily with us, 

 as Humphrey's material was probably scanty and the pits do not appear 

 in areas where the projections are moderately frequent. The positive 

 characters are too convincing for us to doubt the identity of the two 

 plants. 



This species has had a curious history. It is certainly the same as 

 S. moiioica var. turfosa of Minden, which he later (Krypt. Fl. Mark B. 5: 

 608. 1912) recognizes as the previously described species S. paradoxa 

 Petersen, and admits to be of good specific rank. This name cannot stand, 

 however, as it had been used for a different plant ten years earlier by 

 Maurizio, a fact overlooked by Minden. Minden 's description fits our 

 plant perfectly except that he says the oogonial walls are yellowish and 

 does not mention the scarcity of sporangia. Petersen says of his species 

 that the oogonial walls are dilute yellow to hyaline. Minden also refers to 

 Reinsch's unnamed "Sap. No. 2" as being the same, evidently, as shown 

 from the latter 's good figures (a fact that we had also noted for our plant 

 before seeing Minden 's work). Two of Reinsch's figs, show cylindrical 

 oogonia, a condition not recorded by others. (See note under 5. anisospora 

 on the parasite shown in Reinsch 's fig. 11). Gaumann finds the species in 

 Lapland and calls it S. turfosa. It is significant that both Reinsch and 

 Minden found the present species associated with Aplanes aiidrogynus. 



The plant is near S. hypogyna but is sharply marked by its very thick 

 oogonial wall, racemosely borne oogonia on short stalks, and by the 

 peculiar origin of the antheridial branches, resembling in the latter respect 

 Aplanes androgynits and at times even Pythiopsis cymosa. A similar 

 origin of these branches is also found at times in Forms 3 and 8 of 5. 

 hypogyna, but they differ easily in the hypogynous cell, in thinner walls, 

 etc. Kauffman gives the sporangia as abundant in his form (Form 8) 

 of S. hypogyna. 



Petersen says of his plant that the walls of the hyphae are very thick, 

 and suggests that this may be due to a parasite. Minden does not mention 

 this in his first description of S. monoica var. turfosa, but later (p. 608) 

 he notes that the hyphae (walls ?) are thick and yellow, and the ends are 

 often splintered. This last peculiarity must refer to old, dead hyphae. 

 The hyphal walls in our plant are not particularly thick, so far as they 



