SYNOPSIS OF THE NATURAL SYSTEM. 136 



99 Flowers with no calyx or involucre.* . . 105 



100 Calyx adherent to the o'vary. Stamens 612. - - ARISTOLOCHIACEJE. CV. 

 100 Calyx adherent to the ovary. Stamens 5. - - - - SANTALACEJE. CXI1I. 

 100 C.ilyx frej from the ovary. . . . 101. 



101 Pistils entirely distinct. Stamens 00. ... 14 (I.) 



101 Pistils united into a compound ovary. . . . 102 



102 Ovary 1-celled with 1 seed 103 



102 Ovary 3-ce!!ed with 3 seeds. EUPHORBIACE*. CXXI. 



102 Ovary 5-celIed with 00 seeds 29 (LXIV.) 



10J Ovary 6 10-celled with 6 10 seeds. PHYTOLACCACI.E. CXI. 



103 Pistil 1. Embryo straight. URTICACE.E. CXXX. 



103 Pistils 25. Embryo coiled. . . . 104. 



104 Calyx and imbricated bracts dry and scarious. - -' AMARANTACEJE. CVIII. 

 1G4 Calyx (and bracts also if any) green. - ^k- - CHENOPODIACE.*:. CVI. 



105 Flowers on a spadix with a spnthe. ^^fc- - - - - (CXXXIV.) 



105 No spadix or spathe. Stamens 6 or TJH - - SAURACES:. CXVli. 



105 No spadix or spathe. Stamens 2 or ^ I PODOSTEMIACEJE. CXX. 



lOd Calyx adherent to the ovary. ... 30 - - -^H^ (LV.) 



106 Calyx (or involucre) free. . ." . . 107 



106 Calyx 0. Involucre 0. Aquatic. ------ CALLITRICHACE.E. CXIX. 



107 Leaves verticiilate. -------- CERATOPHYLLACEJE. CXVIII. 



107 Leaves opposite. . . . 103 



103 Herbs with a milky juice. Fruit 3-seeded. - - - EUPHORBIACE.E. CXXI. 

 103 Herbs with a watery juice. ... 109 



109 Stipules present. Leaves lobed or compound. CANNABINE^E. CXXX. 



109 Stipules present. Leaves simple, entire. ... 36 (XXI.) 



109 Stipules none. ... 110 



110 Stamens 00. several times more than the sepals. ... 14 (I.) 



110 Stamens 810, tvvica more than the sepals Ill 



110 Stamens as many as the sepals or fewer. . . . 112 



111 Calyx tubular, enclosing the 1-seeded utricle. - SCLERANTHACE^E. CVII. 



Ill Calyx spreading; capsule OO-s.-eded 30 (LV.) 



112 Calyx large, colored, funnel-form, limb entire. - - NYCTAGINACE^E. CIX. 



112 Calyx small or minute, 3 5-lobed. ... 113 



113 Calyx and imbricated bract? dry and scarious. - AMARANTACE^E. CVIII. 



113 Calyx not scarious nor brae ted. ... 114 



114 Stamens alternate with the sepals. Flowers perfect. ... 78 - (LXXTSII.) 



4 Stamens opposite to the sepals. Flowers perfect. ... 44 - - - (XXIII.) 



114 Stamens opposite to the sepals. Flowers dioecious. - URTICACE.E. CXXX. 



115 Flowers not in aments, with a calyx and mostly perfect. ... 116 



115 Flowers imperfect, the sterile only in aments. . . . 120 



115 Flowers imperfect, both the steri e and fertile in aments. . . . 121 



116 Stamens alternate with the sepals, of the same number 117 



116 Stamens opposite to the serials, or more numerous. ... 118 



117 Leaves serrate 66' (XLVI.) 



117 Leaves entire, covered with whitish scurf. - - - ELEAGNACEJE. CXV. 



117 Leaves entire, smooth, evergreen. EMPETRACEJE. CXXII. 



18 Sepals 3, with 6 stamens. Avine. ------ ARISTOLOCHIACEJE. CV. 



118 Sepals 4, with 8 stamens. Erect shrubs. - - - - THYMELACE^E. CXIV. 



118 Sepals 6, with 9 stamens in 3 rows. LAURACE.K. CXII. 



113 Sepals 5 9, with 5 9 stamens in one row. ... 119 



119 Leaves pinnately compound, punctate 67 (XXXII.) 



119 Leaves simple. Calyx adherent to the ovary. - - SANTALACE^E. CXIII. 



119 Leaves simple. Calyx free from the ovary. - - - ULMACEJE. CXVI. 

 120 Leaves simple. Nut or nuts in a cup or burr. - - CUPULIFERJE. CXXIV. 

 120 Leaves pinnate. Nut naked. ------- JUGLANDACEJE. CXX1II. 



121 Plants with a milky juice. Fruit fleshy. - - - - MORE.E. CXXX. 



121. Plants with a watery juice. Fruit dry. . . . 122 



122 Amenta globular, pendulous 123 



122 Aments cylindrical, or oval. . . . 124 



123 Aments racemed. Nutlet 2-celled, several seeded. BALSAMIFLTLE. CXXVIII. 



123 Aments solitary. Nutlets 1-celled, 1-seeded. - PLATANACEJE. CXX1X. 

 124 Ovary 1-celled, 1-ovuled, 1-seeded in fruit. - - - - MYHICACE*. CXXV1. 

 124 Ovary 2-celled, 2-ovaled, 1-seeded in fruit. - - - - BETULACE^E. CXXV. 

 124 Ovary manv-ovuled, many-seeded in fruit. - - - SALICACE.E. CXXVI1. 



125 Calyx 3- or 4-parted. ... 126 



125 Calyx 5-parted : fruit a double-samara. ... 54 (XL1I.- 



'26 Stamens 2. Fruit n ainirle samara. ..,96--------- (CIV.) 



