Tharp: Texas Parasitic Fungi 



123 



Septoria hicoriae sp. nov. 



Spots amphigenous, irregular to subcircular, 3-10 mm. in 

 diameter, grayish-brown with darker brown border above, sooty- 

 brown below ; pycnidia immersed before maturity, at maturity 

 rupturing epidermis, dark-brown, spherical or at maturity twice 

 as wide as deep, 50-125 /x in diameter, ostiola widely gaping in 

 mature pycnidia; spores filiform, hyaline, guttulate or septate- 

 guttulate, curved, 35-50 X 2 ft. 



On living leaves of Hicoria sp. undetermined, and upon H. 

 cordiformis Britton, Conroe and Palestine, Texas, /. M. Lewis 

 & B. C. Tharp. 



Septoria lepidiicola E. & M. 



Spots 1-6 mm. or by confluence much larger ; pycnidia epiphyl- 

 lous, more or less concentrically arranged, 65-140 /x in diameter. 



Description of E. & M. (Sylloge III: 519 and Journal of 

 Mycology, III: 63) very short; gives size of spots as % mm. in 

 diameter; pycnidia aggregated, 74 /x in diameter, not jstating 

 whether epiphyllous or not. 



On living leaves of Lepidium apetahim Willd., Austin, Texas, 

 May 22, 1916, B. C. Tharp. 



Septoria urticaria sp. nov. 



Spots amphigenous, dirty-grayish-brown with punctiform 

 whitish centers and more or less purplish margins above, uni- 

 formly dirty-grayish-brown and less conspicuous below, scattered 

 over entire leaf surface, in extreme cases causing intervening 

 tissue to become chlorotic and leaves to die and fall ; pycnidia 

 amphigenous, but principally hypophyllous, uniformly dull-brown, 

 semi-immersed, globose, 50-125 /x in diameter, ostiola wide ; conidia 

 hyaline, continuous, curved, cylindric, 50-70 X 2 /x. 



On living leaves of Urtica chamaedryoides Pursh, Austin, 

 Texas, Feb. 22, 191 6, B. C. Tharp. 



Septoria wistariae sp. nov. 

 Spots in form of blotches 2-6 mm. in diameter, or sometimes 

 confluent, yellowish-brown above and below, with punctiform 

 black papules marking location of pycnidia above ; pycnidia epi- 

 phyllous, immersed, extending through palisade parenchyma, 

 spherical, 90-1 10 jx in diameter, dark-brown; conidia hyaline, 

 slightly curved, septate, 45-65 X 2/1. 



