758 
Journal of Agricultural Research 
Vol. XXIII, No. 9 
In Sclerotiopsis concava the central cavity is about equally lysigenetic 
and schizogenetic. The swelling of certain cells of the more or less 
parallel hyphae composing the primordium causes a rupture along 
irregular lines, extending across the pycnidium, above and below, thus 
cutting out a strip of tissue which soon completely disorganizes. The 
cavity is further enlarged by the addition of new tissue at the border of 
the pycnidium. There is no ostiole in this pycnidium; spore discharge 
is effected through the bursting of the wall due to the swelling resulting 
from inhibition and the partial or complete destruction of certain spores 
at the center of the mass filling the pycnidium. 
The central cavity in Schizoparme straminea , as it grows on strawberry, 
is largely schizogenetic. A ring of disorganized tissue usually lines the 
cavity clinging to the wall. A buffer tissue through which a passageway 
is opened by disorganization develops soon after the primordium has 
been laid down. The ostiolar cavity is formed as the result of the breaking 
down of the cells of the wall in the early stages; the adjacent cells bud 
out and hyphae grow upward, converging to form the papillate ostiolar 
structure. In the meantime by the rapid destruction of the buffer tissue 
along lines radiating from a point above the ostiole this caplike structure 
is split open in a characteristic fashion. 
The first hyphae to grow into the central cavity as it is forming are 
the homologues of sporophores, but they do not necessarily produce 
spores, since those first appearing usually disorganize, furnishing sub¬ 
stances which by swelling may play some part in shaping the tissues of 
the wall. 
Food for spore production is found in the parenchyma at the center of 
the immature fruit body in the first two forms. The pycnidium of the 
third species remains plastic for a long time, so that additional food may 
be easily obtained from the substratum upon which the fungus is growing. 
literature cited 
(1) Fuisting, Wilhelm. 
1868. ZUR ENTWICKEEUNGSGESCHICHTE DER PYRENOMYCETEN. III. In Bot. 
Ztg., Jahrg. 26, No. 23, p. 369-375; No. 24, p. 385-398; No. 25, p. 401- 
407; No. 26, p. 417-422, pi. 7 (fold.). 
(2) Bauke, Hermann. 
1876. BEITRAGE ZUR KENNTNISS DER PYCNIDEN. I. In Nova Acta K. Leop.-Carol. 
Deut. Akad. Naturf., Bd. 28, No. 5, p. 443-512. P 1 - 28-33 (partly col.). 
(3) Bary, Heinrich Anton de. 
1884. VERGEEICHENDE MORPHOEOGIE UND BIOEOGIE DER PIEZE, MYCETOZOEN 
und bacteriEn. xvi, 558 p., 198 fig. Berlin. Bibliographies inter¬ 
spersed. 
(4) MiyabE, Kingo. 
1889. ON THE UPE-HISTORY OF MACROSPORIUM PARASITICUM, THUM. In Ann. 
Bot., v. 3, no. 9, p. 1-26, pi. 1-2. 
(5) Baccarini, Pasqnale. 
1890. note patoeogiche. In Nuovo Gior. Bot. Ital., v. 22, no. 1, p. 64-70. 
( 6 ) - 
1890. sueeo svieuppo dei picnidii. In Nuovo Gior. Bot. Ital., v. 22, no. 1, 
p. 150-151. 
(7) IstvAnffi, Gyula. 
1902. Etudes setr le rot eivide de la vigne (coniothyrium diplodieeea). 
Ann. Inst. Cent. Ampelol. Roy. Hongrois, v. 2, vii, 288 p., 12 fig., 24 pi. 
(8) Reddick, Donald. 
1911. THE BEACK ROT disease of grapes. N. Y. (Cornell) Agr. Exp. Sta. 
Bui. 293, p. 289-364, fig. 131-146, 5‘pi. Bibliography, p. 35 °" 3 6 4 - 
(9) Orton, C. R. 
1915. STRUCTURAL PARALLELISM BETWEEN SPORE-FORMS IN THE ASCOMYCETES. 
In Mycologia, v. 7, no. 1, p. 21-27, pi. 152. 
