36 Bulletin 313 



Nectria ipomoe^ Hals. — On sweet potatoes. Causes a storage 

 rot but is saprophytic rather than parasitic. Conidia (Fusarium 

 sp.) falcate 1 to 6-celled; perithecia in tufts, globose or somewhat 

 conical, red ; asci clavate, 8-spored ; spores elliptical, 1-septate, 

 slightly constricted, hyaline. The ascigerous stage was produced 

 from single conidiospore culture. 



134. Mycelium, conidiophores and spores 1/6. 135. Conidia, 1/12. 136. 

 Various formations of chlamydospores, 1/6, 1/12. 137. Germinating chlamyd- 

 ospores, 1/12. 138. Immature perithecium, 2/3. 139. More advanced stage 

 of same, 2/3. 140. Tip of mature perithecium, 1/6. 141. Asci, 2/3". 142. 

 Same, 1/6. 143. Ascospores, 1/6. 144. Germinating ascospores, 1/6. 



Chromocrea ceramica (E. & E.) Seaver. — On Ganoderma tsugcB. 

 Seaver (Mycologia, v. 2, p. 59, 1910) describes it as follows: 



"Stromata appearing first as a speck of white tomentimi, with a 

 brick- red spot appearing in the center, finally becoming fleshy, 

 rather thick and entirely brick-red without, and white within, sub- 

 patellate, convex, becoming wrinkled when dry, punctuate with the 

 necks of the slightly protruding perithecia finally dusted over with 

 the greenish spores ; asci cylindrical, becoming 16-spored by the 

 breaking of each original spore into 2 subglobose cells ; spores 

 about A jx m diameter, the lower of each pair a little larger than 

 the upper." ' 



This description from material growing on decaying limb of 

 Juniperns. Our specimen was without doubt parasitic. The fungus 

 determined by Dr. F. J. Seaver and the host by Dr. W. A. Murrill. 



145. Cross-section of stroma, 2/3. 146. Same, 1/6. 147. Ascus, 1/12. 

 148. Ascospores, 1/12. 



Balansia hypoxylon (Pk.) Atk. — On the grasses. Seaver 

 (Mycologia, v. 3, p. 223, 1911) describes this species as follows: 

 "Sclerotia formed in the fruiting axis of the host, curved and ir- 

 regular, 1 cm. or more in length, grayish or blackish ; stromata 

 black, prominent, pulvinate or subhemispheric, 1-5 mm. in diame- 

 ter, several springing from the same sclerotium minutely roughened 

 by the slightly protruding perithecia, perithecia immersed ; asci cylin- 

 dric, with a pedicel at the base, as much as 20 [x in length; spores 1 

 mic thick at maturity breaking into segments 3-4 [i long. 



149. Infected grass. 150. Cross-section of stroma, 2/3. 151. Same, 1/6. 

 152. Ascus containing spores, 1/12. 



