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 (pl. 3, f. 8). The perithecium without the 
neck measures 160u in height and 180, in diameter, aver- 
age, and the neck about 1 mm. in height and 20y in diam- 
eter, average. The ascospores average 5.5u by 2.5p. 
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 sapwood 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 
