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AMERICAN JOURNAL OF BOTANY 
[Vol. 8 
from one to several cubic centimeters could be withdrawn with a sterile 
pipette. These experiments are merely a preliminary step in an investi- 
gation of the production of phenols by molds. Dr. J. F. Brewster of the 
Laboratory of Biological Investigations is at present engaged on this re- 
search. 
Key to species described from culture. 
I. Conidia pitted-areolate (determinable only by oil immersion): 
A. Colonies typically yellow-green at first, shading to yellowish brown in age. A. 
flavus-oryzae series: 
Aerial growth of fertile hyphae only: 
Stalks long, 2 to several mm.: A. oryzae. 
Stalks 400 to 600 rarely 1,000 n: A. flavus. 
Stalks 200 to 500 fjL, crowded : A . parasiticus. 
Aerial growth, both vegetative hyphae and fertile hyphae: A. effusus. 
B. Colonies yellow to brown, never green: A. Wentii. 
II. Conidia bearing brown color-bars: 
Stalks conspicuously pitted, thick- walled: 
Stalks 500 to 1,000 M long: A. tamari. 
Stalks 300 to 600 IX long: A. terricola. 
Stalks obscurely pitted, collapsing in age: A. citrisporus. 
Suggested relationship of species elsewhere described from culture but 
not identified by us: 
A . Belonging to A . flavus-oryzae series : 
1. Gigantic and floccose types related to A. oryzae (Ahlb.) Cohn: 
Showing transient green: Takahashi's N, near A. perniciosus. 
Showing no transient green: Takahashi's D, near A. giganto- sulphur eus. 
2 . Bridging forms intermediate in measurements between typical A . flavus and A . oryzae : 
A. pseudoflavus Saito. 
A. gymnosardae Yukawa. 
2. Bridging forms as no. 2 with much smaller conidia: 
Takahashi's P, near A. micro-virido-citrinus Cost, and Lucet. 
B. Probably belonging with A. tamari: 
Color butter-yellow, conidia 5 to 7 /x: S. butyracea Bainier. 
Color umbrinus, conidia 6 to 9 )U, white sclerotia: A. umhrinus Patterson. 
C Pathogenic to man : 
Reported from human ear: A. flavescens Wreden, 
Reported from skin lesions: A. Tokelau Wehmer. 
The following is a bibliography of organisms referred to in this paper 
or whose relationship to these groups is suggested by the literature. The 
citations are arranged alphabetically to specific names. 
5. alho-lutea Bainier. Bull. Soc. Bot. France 27: 30. 1880. This was 
a small pale yellow form, but no further data were given and it has not since 
been identified. 
A. aurantiacus Berkeley is cited by Montague (Ann. Sci. Nat. Bot. Ill, 
12: 299. 1849) as having clavate heads. Farlow (Bibliographical Index 
of North American Fungi i, pt. i, p. 276, issued Sept. i, 1905) places this 
organism with Nematogonium aurantiaciim Desm. Personal examination of 
