ANALYSIS OF THE NATURAL ORDERS. 11 



C. COHORT 3. APETALOUS EXOGEN8. 



Plants herbaceous, the flowers not in aments (except Huinulus, 115).. (2) 

 Plants woody, shrubs or trees. .(8) 



2 Flowers? with a regular calyx (or a calyx-like involucre).. (3) 

 2 Flowers? achlamydeous, neither calyx nor corolla. . (&) 



3 Calyx tube adherent to the ovary, limb lobed, toothed, or entire (9) 

 3 Calyx free from the ovary, sometimes enclosing it.. (4) 

 4 Ovaries several, entirely distinct, each 1-styled, l-ovuled..(0r) 

 4 Ovary 1 only, simple or compound.. (5) 

 5 Style or stigma 1 only . . (0) 

 5 Styles or stigmas 2 12.. (7) 



6 Ovary 1-ovuled. bearing but 1 seed, .(c) 

 6 Ovary many-ovuled, bearing many seeds.. (cf) 

 7 Ovary 1-3-ovuled, 1-3-seeded. .(e) 

 7 Ovary 4- GO-ovuled, 4- OO-seeded . . (h) 

 8 Flowers not in aments, with the leaves opposite.. (n) 

 8 Flowers not in aments, with the leaves alternate.. (10) 

 8 Flowers imperfect, the sterile only in aments.. (v) 

 8 Flowers imperfect, both the fertile and sterile in aments.. (a?) 

 9 Stamens 112, as many or twice as many as the stigmas.. (a) 

 9 Stamens 210, not symmetri ;al with the 1 or 2 stigmas.. (6) 

 10 Style or stigma 1. Fruit 1-seeded. . (11) 

 10 Styles or stigmas 2..(s) 

 10 Styles or stigmas 3 9..(Q 



11 Calyx free from the ovary.. (p) 

 11 Calyx adherent to the ovary.. (r) 



a Stigmas and cells of the ovary 1 4. Stamens 18 OEDEES 48, or 54 



a Stigmas and cells of the ovary 6. Stamens 6 or 12...A_RiSTOLOCHiACE,E. 102 



b Styles 2. Ovary many-seeded. Stamens 8 10 ORDER 45 



b Style 1. Ovary 1- or 2-seeded. Stamens 5 SANTALACE^E. 119 



e Flowers perfect. Calyx 4-lobed. Stamens 14 ORDER 44 



c Flowers perfect. Calyx entire, funnel-shaped, colored.. NYCTAGINACE^E. 101 



e Flowers diclinous. Calyx 4-5-parted, green URTICAOE^. 115 



d Stamens 4, opposite to the 4 sepals. Leaves numerous ORDER 53 



d Stamens 4, opposite to the 4 sepals. Leaves about 6 ORDER 1 45 



d Stamens 5, alternate with the 5 sepals ORDER 81 



c? Stamens GO. Leaves large and showy. Cultivated ORDER 9 



Fruit 3-(rarely 6-)seeded, with 3 (often cleft) styles EUPHORBIACE^E. 113 



e Fruit 1-seeded. Stipules sheathing the stems POLYGONACE,E. 104 



Fruit 1-celled, mostly 1-seeded. Stipules none. . (/) 



f Calyx with scarious bractlets outside AMARANTACE/E. 107 



f Calyx naked (double in 1 genus). Lvs. alternate.. CHENOPODIACE/E. 106 



f Calyx naked. Leaves opposite ORDER 19 



g Stamens hypogynous on the torus ORDER 1 



g Stamens perigynous on the calyx ORDER 44 



h Leaves opposite. Fruit circumscissile, a pyxis ORDER 61 



h Leaves opposite. Fruit 4-5- valved, a capsule ORDER 19 



h Leaves alternate .(i) 



i Fruit 5-horned, 5-celled, a capsule ORDER 46 



i Fruit a fleshy 4-10-seeded berry I'HYTOLACOACE^E. 105 



i Fruit circumscissile, a utricle AMARANTACE^E. 107 



t Flowers on a spadix with a spathe. Monocotyledons ORDER 130 



k Flowers in a long naked spike. Stamens 6 or 7 SAURUBACKJS. 115 



t Flowers solitary, axillary, minute. Aquatic plants.. (m) 



