CHROMOGENIC FUNGI WHICH DISCOLOR WOOD. 67 



layer of cells united in a rudimentary tissue. From the 

 upper side of the young perithecium, after it has grown to 

 about its normal size, there is projected a long tube or beak 

 composed of parallel hyphae which terminate with colorless 

 ends in a rounded tip. When the perithecium is mature it 

 contains a large number of irregularly obovate or elliptical 

 asci, each containing eight spores, usually arranged in 

 fours. The beaked ostiolum, when the ascospores are 

 ejected, splits at the end into a number of bristles which 

 spread out and form a supporting crown for the ejected 

 ascospores (pi. 3, f. 8). The perithecium without the 

 neck measures 160fi in height and 180/a in diameter, aver- 

 age, and the neck about 1 mm. in height and 20/x, in diam- 

 eter, average. The ascospores average 5.5/x by 2.5/i. 



It is quite evident that the sac containing the ascospores 

 is dissolved at maturity, since it is rarely found with the 

 mature ejected spores, but must be looked for in perithecia 

 just approaching this stage. If the spores are ejected in 

 open air they usually collect in a globular drop at the 

 terminus of the neck, and when in this position the drop 

 resembles very much the heads of some species of 

 Graphium when covered with the mucus drop characteris- 

 tic of the latter genus. If the spores are discharged in 

 water they form worm-like sticky masses not readily mis- 

 cible with water. 



Ceratostomella Schrenkiana n. sp. 



The sap wood of pine lumber made from Pinus echinata 

 in Arkansas and other southern localities is stained by a 

 number of fungi, among which are species of Ceratosto- 

 mella, Hormodendron, Graphium, Hormiscium and Peni- 

 cillium. A species of Ceratostomella which greatly re- 

 sembles C. pilifera has been frequently collected on the 

 wood of the southern pines by Dr. von Schrenk and others, 

 from various localities in Missouri and Arkansas. 



This species, when grown side by side with cultures of 

 C. piliferafrom the Black Hills pine, attains the same 



