PART 1

128
microconidia globose or
elliptical, ca. 2 µm diam. or
2-3 × 1.5-2 µm; neotropical .......................................
A. excaecariae (Müll. Arg.) R. C. Harris
17. Ascospores 12-17(-19) × 3.5-4.7
µm; microconidia narrowly ovoid,
4-5 × 1-1.3 µm; macroconidia
oblong, 9-10.5 × 2-2.5 µm;
Scotland & Wales............................................................
A. viridescens (Coppins) R. C. Harris
16. Thallus well developed, epiphloeodal;
ascospores 12-18 × 5-7.5 µm;
macroconidia globose, ca. 2 µm diam.;
microconidia globose, 2.5-4 µm diam.;
Illinois, Massachusetts, Ohio.................................................
A. leucochlorum (Müll. Arg.) R. C. Harris
13. Ascospores 14-20 × 4.5-6 µm, ovoid, with
submedian septum, often becoming 4-celled;
micropycnidia beaked ("Sarcinulella");
microconidia oblong or narrowly elliptical,
2-3 × 1-1.5 µm; temperate North America
and Europe........................................................................................
................................ A. nyssaegenum (Ellis & Everhart) R. C. Harris
12. Ascospores relatively short, less than 15 µm ..................................... 19
19. Septum weakly submedian to median ......................................... 20
20. Ascospores 10-18 × 4.5-7 µm, broadly
elliptical to ovoid, rarely narrowly ovoid, with
septum slightly submedian or ± median;
microconidia oblong or elliptical, 2.5-3 ×
1.5-2 µm or globose, ca. 2 µm diam.;
macroconidia elliptical or oblong, 5-7 ×
3-4 µm; cosmopolitan..................................................................
................................................. A. biforme (Borrer) R. C. Harris
20. Ascospores 9-13(-15) × 4-5 µm, ovoid,
with septum median to slightly submedian;
ascomata small 0.2-0.3(-0.4) mm diam.;
microconidia oblong or elliptical, 3-4 × 1.5-2
µm; Florida ................................ A. albisedumi (Nyl.) R. C. Harris
19. Ascospore septum markedly submedian;
ascospores ovoid, 12-15 × 6-8 µm;
microconidia globose, ca. 2 µm; New
Zealand ................................... A. subatomaria (Knight) R. C. Harris
11. Macropycnida with a long, hair-like beak, extruding