13. Smilacina. Stem simple, leafy. Flowers 6-parted, racemose or paniculate.
14. Maianthemum. Stem low, 2-leaved. Flowers 4-merous, racemose.
Series B. Floral bracts none or foliaceous. Stamens hypogynous or at the base of the distinct segments of the deciduous perianth (persistent in n. 23); anthers extrorse or dehiscent laterally. Style undivided, deciduous (stigmas sessile and persistent in n. 23). Fruit a loculicidal capsule or a berry. Veinlets anastomosing (transverse in n. 15, 17–19).
[*] Fruit a berry; stem or scape from a creeping rootstock; leaves broad, alternate or radical; flowers narrowly campanulate.
15. Streptopus. Stem leafy. Flowers axillary, on bent pedicels. Anthers sagittate, acute; filaments deltoid or subulate.
16. Disporum. Stem leafy. Flowers few, in terminal umbels. Anthers oblong, obtuse; filaments slender. Veinlets anastomosing.
17. Clintonia. Flowers umbellate on a scape, few or many.
[*][*] Fruit a capsule.
[+] Stems leafy, from a short or creeping rootstock; flowers few, solitary, pendulous; capsule few-seeded.
18. Uvularia. Stem terete. Leaves perfoliate. Flowers terminal. Capsule truncate, 3-lobed.