A checklist of the economically and ecologically important subfamily Maloideae (Rosaceae) is presented. One thousand one hundred and ten species are recognised in 23 genera, as well as 33 species in 13 intergeneric hybrid genera. An alphabetic arrangement is used within each taxonomic rank. The larger genera are subdivided into infrageneric groupings to represent structure. Several new infrageneric taxa were created to reconcile different sources. This checklist is believed to be complete to 1986 and represents the compilation and synthesis of over 170 publications. The following new names are published: Crataegus series Henryanae Phipps, ser.nov. et stat.nov.; Crataegus section Hupehensis Phipps, sect.nov.; Crataegus series Hupehenses Phipps, ser.nov.; Crataegus section Lacrimatae Phipps, sect, et stat.nov.; Malacomeles paniculata (Rehder) Phipps, comb.nov.; Sorbus subgen. Micromeles (Decne.) Phipps, Robertson & Spongberg, subgen. et stat.nov.; Sorbus section Albo-carmesini H.A. McAllister, sect.nov.
Annual or perennial herbs, often woody at the base, infrequently lianas [or shrubs or trees] ; stems erect to decumbent, trailing, or climbing, simple cent, [very rarely fleshy and/or articulated], usually from a stout taproot. infrequently serrulate or shallowly lobed, [very rarely reduced to scales or absent], long-petiolate to sessile; stipules absent. Inflorescences of compact cymes or clusters arranged in axillary or terminal, simple or compound spikes, panicles, heads, or rarely racemes, or the flowers solitary; foUage leaves often reduced and bractlike in the inflorescence; each flower subtended by 1 bract and usually 2 bracteoles, all usually scarious, often spinescent, the 'Prepared for the Generic Flora of the Southeastern United States, a project of established in the first paper in the series (Jour. Arnold Arb. 39: 296-346. 1958). The area covered includes North and South
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