45(39) Spores separate in the ascus. (_Ascobolus_) 46 - Spores firmly joined together, both in the ascus and after ejection (fig. 10). (_Saccabolus_) 66 46(45) Spores spherical. 47 - Spores ellipsoid. 48 47(46) Spores 10.5-13.5µm, epispore with numerous but isolated warts. _Ascobolus brassicae_ (figs 8, 9) - Spores 11.5-13.5(15)µm, epispore with subparallel occasionally anastomosing lines. _Ascobolus crosslandii_ 48(46) Spores very large, mostly 50-70 × 25-35µm, almost oblong with rounded ends, typically with few cracks in the epispore. _Ascobolus immersus_ (figs 7, 9) - Spores smaller, with epispore smooth, warted or with cracks. 49 49(48) Epispore strongly and irregularly wrinkled with a vesiculose layer of pigment, 11.6-16 × 6.5-9.3µm. Paraphyses capitate up to 18µm. Apothecia up to 0.6mm diam. _Ascobolus rhytidiosporus_ - Epispore not strongly wrinkled/vesiculose. 50 50(49) Epispore basically smooth or warted, perhaps with a few irregular cracks. 51 - Epispore with a clear pattern of cracks or lines. 56 [Illustration: FIG. 7. Apothecia of, from left, _Ascobolus furfuraceus_, _A. immersus_ and _A. albidus_.] [Illustration: FIG. 8. _A. brassicae_, ascus with spores and detail of operculum.] [Illustration: FIG. 9. Ascospores of, clockwise from left, _A. immersus_, _A. stictoideus_, _A. albidus_, _A. brassicae_ and _A. crenulatus_.] 51(50) Spores up to 25µm long. 52 - Spores longer, 25µm or more. 54 52(51) Epispore smooth, finely granular or punctate. Gelatinous material unilateral, not surrounding spore. 53 - Epispore warted, spores 18.5-21(22.5) × (9)10-11.5µm, surrounded by gelatinous sheath. _Ascobolus hawaiiensis_ 53(52) Spores 18-24 × 10-13µm. Hymenial mucus greenish yellow. Excipulum not brown. _Ascobolus mancus_ - Spores 20-25 × 11-13µm. Hymenial mucus sulphur yellow. Excipulum with rich brown intercellular pigment. _Ascobolus boudieri_ 54(51) Epispore smooth or finely granular, spores 23-29(32) × 12-17µm. _Ascobolus elegans_ - Epispore warted. 55