[+] 1. At least the inner perianth corolla-like; ovary compound; seeds with copious albumen.
116. [Liliaceæ] ([p. 517]). Flowers perfect, 6-androus, the regular perianth corolla-like (diœcious in Smilax, dimerous in Maianthemum, the outer divisions herbaceous in Trillium). Fruit a 3-celled capsule or berry.
117. [Pontederiaceæ] ([p. 535]). Aquatic, with more or less irregular perfect flowers from a spathe; perianth corolla-like. Stamens 3 or 6, mostly unequal or dissimilar. Capsule 1-celled or imperfectly 3-celled.
118. [Xyridaceæ] ([p. 536]). Rush-like, scapose. Flowers capitate, perfect, 3-androus, the calyx glumaceous. Capsule 1-celled.
119. [Mayaceæ] ([p. 537]). Moss-like aquatic. Flowers perfect, axillary, solitary, 3-androus; calyx herbaceous. Capsule 1-celled.
120. [Commelinaceæ] ([p. 538]). Flowers perfect, regular or somewhat irregular, with 3 more or less herbaceous persistent sepals and 3 fugacious petals. Stamens 6 or some sterile. Capsule 2–3-celled.
127. [Eriocauleæ] ([p. 566]). Scapose aquatic or marsh plants, with linear leaves and dense heads of monœcious (rarely diœcious) minute flowers. Corolla tubular or none. Capsule 2–3-celled, 2–3-seeded.
[+] 2. Perianth small, of 6 equal persistent glumaceous segments; flowers perfect; ovary compound.
121. [Juncaceæ] ([p. 539]). Rush-like. Stamens 3 or 6. Capsule 1- or 3-celled, 3-valved.
[+] 3. Flowers without chaffy glumes, the perianth none or reduced to bristles or sepal-like scales; flowers often monœcious or diœcious; carpels solitary or united.