44 Journal of Mycology [Vol. 13 



7, 8), the latter being attached at the middle of one edge of one 

 of the cells. The spores are 6-8 /a thick and 13-16 /x wide and 

 high. Usually the conidiophore separates from the spore leav- 

 ing a portion but one or two microns long, although occasionally 

 the whole conidiophore may remain attached when the spore 

 separates from the sporodochium. The spiny spores are long- 

 stalked, the stalks being 30-120 (usually 50-70) /^ long. These 

 conidiophores are non-septate. The spores are like the precedmg, 

 four-celled, but the constrictions between the cells are deeper and 

 the outer portions are spiny ; the plane passing through the four 

 cells is perpendicular to the conidiophore which is fastened at the 

 point where the four cells meet (Figs, i, 2 and 4). In the orig- 

 inal description of the species, as well as that occurring in the 

 Sylloge Fungorum.-* the fungus is described as consisting of su- 

 perficial sporodochia with fasciculately-radiating, filiform, non- 

 septate, fuscous hyphae, 99-100x2-3 /a, terminating in fulginous, 

 mostly four-celled, sporophores upon which are borne on sub- 

 hvaline, acicular sterigmata, sarciniform-four-celled, fulginous. 

 smooth conidia, constricted at the septa, 16-20 /x in diameter. 

 Essentially the same description is given in Die natiirlichen Pflan- 

 zenfamilien.'^ Examination of Fig. 3 (which was drawn with 

 camera lucida) will convince one, however, that this description 

 is erroneous, for it will be seen that the two forms of spores are 

 borne independently of one another directly from the sporodochial 

 hyphae, instead of the smooth spores being conidia borne upon 

 a spiny, long-stalked sporophore. The writer made pure cul- 

 tures of the fungus obtained on dead pineapple leaves and found 

 that under certain conditions only smooth-celled conidia would 

 be formed, while at other times, none but the long-stalked, spiny 

 forms would appear; while still again both would be mixed on 

 the same sporodochium. Hanging drop cultures were then made 

 to observe the germination of the two types. The smaller smooth 

 spores germinated quickly, usually within a day or two, mostly 

 with one germ tube from each cell' (Figs. 7, 8, and 9, Fig. 9 being 

 an abnormally-shaped and unusually large spore). The germ 

 tubes are stout with several granules near the partitions. The 

 spiny spores germinated with difiiculty after three days, or even 

 longer, producing first many hyaline, bladder-like structures from 



*Vol. 4: p. 758, 1886. "Sporodochiis superficialibus. * * * * 

 hyphis fasciculato-radiantibus, fiHformibus, 90-100 x 2-3, eseptatis, fuscis 

 in sporophora, saepius 4-cellularia. fuliginea desinentibiis ; conidiis e 

 sporophoris per sterigmata acicularia subbyalina, 30-40 M long, oriundis, 

 sarciniformi-subquadricellularibns, ad septa constrictis, 16-20 diam. fuli- 

 gineis, levibus." 



"I Teil, 1. Abt.** p 515, 1900. "Conidienlager gewolbt, dicht 

 schwarz. Hyphen dicht stehcnd, am Endc in eincm mehrzelligen, Sarcina- 

 artigen, sporcntragendcn Teil endigend. Conidien aus dem sporentra- 

 genden' Teil mit eineni Sterigma entspringend, ^arcmo-artig gestaltet, 

 haufig iiber Kreuz vierzellig, dunkel gefarbt." 



