Stipules not scarious, leaves palmately cleft or palmately compound. Cannabineæ, in URTICACEÆ, 461 Stipules scarious (or none); leaves opposite. ILLECEBRACEÆ, 426 Stipules none; but flowers with scarious bracts. AMARANTACEÆ, 427 Stipules and scarious bracts none. CHENOPODIACEÆ, 430 Shrubs or trees. Ovules a pair in each cell of the ovary. Fruit 2-celled, a double samara. Acerineæ, in SAPINDACEÆ, 115 Fruit a 1-celled and 1-seeded samara or a drupe. OLEACEÆ, 335 Ovules single in each cell of the Three-nine-celled ovary; leaves heath-like. EMPETRACEÆ, 487 Three-celled ovary; leaves broad. RHAMNACEÆ, 111 One--two-celled ovary; styles or stigmas 2-cleft. URTICACEÆ, 461 One-celled ovary; style and stigma single and entire. Anthers opening longitudinally. THYMELÆACEÆ, 448 Anthers opening by uplifted valves. LAURACEÆ, 446 [B.] _Flowers monœcious or diœcious, one or both sorts in catkins._ [1.] _Only one sort of flowers in catkins or catkin-like heads._ Fertile flowers in a short catkin, head, or strobile. URTICACEÆ, 461 Fertile flowers single or clustered; sterile in slender catkins (except in Fagus). Leaves pinnate; fertile flowers and fruit naked. JUGLANDACEÆ, 467 Leaves simple; fertile flowers 1--3 in an involucre or cup. CUPULIFERÆ, 470 [2.] _Both sterile and fertile flowers in catkins or catkin-like heads._ Ovary and pod 2-celled, many-seeded. Liquidambar, in HAMAMELIDEÆ, 180 Ovary and pod 1-celled, many-seeded; seeds furnished with a downy tuft at one end. SALICACEÆ, 480 Ovary 1--2-celled, only one ovule in each cell; fruit 1-seeded. Parasitic on trees; fruit a berry. LORANTHACEÆ, 449 Trees or shrubs, not parasitic. Calyx regular, in the fertile flower succulent in fruit. URTICACEÆ, 461 Calyx none, or rudimentary and scale-like. Style and stigma one, simple; the flowers in heads. PLATANACEÆ, 466 Styles or long stigmas 2. Fertile flowers 2 or 3 at each scale of the catkin. CUPULIFERÆ, 470 Fertile flowers single under each scale; nutlets naked, waxy-coated or drupe like. MYRICACEÆ, 469