182 SYNOPSIS OP THE NATURAL SYSTEM. 



23 Leaves simple. . . : 24 



23 Leaves compound. ... 25 



24 Petals persistent. Ovary 1-celled. Leaves radical. - - DROSERACE.E. XVIII. 

 24 "Petals*fugacious. Ovary 5 10-celled. Leaves cauline. - LINACEJE. XXVI. 

 24 Petals deciduous. Ovary 5-celIed. Leaves cauline. .. .87 - - (LXXV1II.) 



25 Juice acrid. Sepals valvate in the bud. - - - LVMNANTHACEJE. XXX. 



25 Juice acid. Sepals imbricate in the bud. - - - - OXALIDACEJE. XXXI. 



25 Juice bitter Leaves pinnate, dotted. RUTACE^E. XXXIV. 



28 Flowers cruciform, regular. Stamens tetradynamous. - - CHUCIFERJE. Xlll. 

 26 Flowers rather irregular. Stamens not tetradynamous. ... 27 



27 Calyx closed in the bud. Pod closed until ripe. CAPPARIDACEJE. XIV 



27 Calyx open in the bud. Pod open before ripe. - - - RESEDACE.E. XV. 



28 Stamens 5, opposite to the five petals. ...78 (LXXXV.) 



28 Stamens alternate with the petals when of the same number. ... 29 



29 Styles 3 20, as many as the sepals. - - - - CRASSULACE.S. LXIV. 



29 Styles 2, fewer than the sepals. SAXIFRAGACE.E. LXV. 



29 Styles 4, fewer than trfWepals. Parnassia. - - DROSERACEJE. XVIII. 

 30 Flowers 5-parted, in simple or compound umbels. ... 31 

 30 Flowers 1, 2, 3 or 4-parted, not in umbels. ONAGRACE>E. LV. 



31 Styles 2, forming a 2-partible, dry fruit. - - - UMBELLIFER^E. LXVII. 



31 Styles 3 or 4 (rarely 2), forming a berry or drupe, - ^ARALIACEJE. LXV1II. 

 32 Flowers both regular and perfect. ... 33 

 32 Flowers either irregular or monoecious. ... 34 



33 Stamens 00, united into a column with the 5 styles. MALVACE^S. XXXVII. 



33 Stamens 10, united only at base, free from the styles. OXALIDACEJE. XXX.I 



33 Stamens many or few, distinct, perigynous. - - - ROSACEJE. XLVIII. 



34 Ovary free, 3-celled, forming a capsule. VIOLACE.E. XVII. 



34 Ovary free, 1-celled, forming a legume. LEGUMINOS.K. XLVII. 



34 Ovary adherent, 3-celled. Flowers monoecious. - - - BEGONIACE.E. LVIII. 



35 Leaves furnished with (either large or small) stipules. ... 36 



35 Leaves destitute of stipules. ... 37 



36 Petals 5, twisted in the bud, larger than the sepals. - GERANIACEAS. XXVII. 

 36 Petals 5, not twisted in the bud, very small. - - - ILLECEDRACE^E. XXII. 

 36 Petals 2 or 3, not twisted. - - ELATINACEJE. XXV. 



37 Flowers very irregular. TOLYGALACE.E. XVI. 



37 Flowers regular, or but slightly unequal. ... 33 

 38 Ovary or ovaries superior free from the calyx. ... 39 

 38 Ovary wholly adherent to the calyx tube. ... 40 

 38 Ovary adhering to the calyx tube by the angles only. - MELASTOMACEJB. LI. 



39 Ovaries many, distinct, simple, caudate. ----- RANUNCULACE.E. I. 



39 Ovary 1, simple. Leaves 2 only in Podophyllmn. - BERBERIDACE.E. VI. 



39 Ovary compound. ... 41 

 40 Involucre 4-leaved, white, subtending the small cyme. - CORNACE^E. LXIX. 



40 Involucre none. Leaves numerous, simple. ONAGRACE^E. LV. 



40 Involucre none. Leaves 3 only, compound. Panajc. ARALIACE.E. LXV1II. 



41 Sepals 2, fewer than the petals. PORTULACACE.S. XXIV 



41 Sepals 35. Style and s,tigma 1. ... 42 



41 Sepals 35. Styles and stigmas several. ... 43 



42 Sepals equal, combined into a tube. - - LYTHRACEJE. LII 



42 Sepals unequal, nearly distinct. CISTACE.E. XIX 



43 Stamens hypogynous on the receptacle. ... 44 



43 Stamens perigynous on the calyx. ... 45 



44 Stem tumid at the nodes. Leaves not punctate. - CARYOPIIYLLAC-E.E. XXIII. 

 44 Stem often ancipital. Lvs. with pellucid and black dots. HYPERICACE.S. XX. 



45 Stanfens 20 or more, indefinite. Exotic. - - - MESEMBRYACE.E. LXI1. 



45 Stamens fewer than 20, definite. ... 46 



46 Pistils (follicles) distinct, as many as the sepals. - - CRASSULACE.K. LXIV. 

 46 Pistils 25, partly or completely united. ... 47 



47 Styles 3 5. Embryo coiled. CARYOPHYLLACEJE. XXIII. 



47 Styles 2. Embryo straight. SAXIFRAGACE^S. LXV. 



48 Leaves opposite. ... 49 

 48 Leaves alternate- ... 58 



49 Flowers irregular. -- HIPPOCASTANACEJJ. XLII1. 



49 Flowers regular. ... 50 



