6 ANALYSIS OF THE NATURAL ORDERS. 



4 Leaves opposite. . (s) 

 4 Leaves alternate. . (5) 



5 Stamens on the torus or the hypogynons corolla.. (f) 

 5 Stamens and petals on the calyx tube. . (v) 



6 Ovaries simple, distinct, or one only. Vines or erect shrubs, .(w) 

 6 Ovary compound, and wholly adherent to the calyx.. (x) 

 6 Ovary compound and free from the calyx or nearly so.. (7) 



7 Stamens opposite to the petals and of the same number. . (y) 

 7 Stamens alternate with the petals or of a different number. .(8) 

 8 Leaves opposite on the stems.. (2) 

 8 Leaves alternate, and compound.. (j/y) 

 8 Leaves alternate and simple. . (22) 



9 Polyandrous stamens 310 times as many as the petals. . (m) 

 9 Oligaudrous, stamens 1 2 times as many as the petals or fewer. .(10) 

 10 Pistils separate and distinct, few or solitary, simple.. (re) 

 10 Pistils united into a compound ovary free from the calyx.. (11) 

 10 Pistils united into a compound ovary adherent to the calyx. . (0) 

 11 Stamens opposite to the petals and of the same number. . (p) 

 11 Stamens alternate with the petals or of a greater number. . (q) 

 *\1 Flowers regular or nearly so. Fruit never a legume . . (14) 

 ^ i2 Flowers irregular (rarely regular and the fruit a legume) .. (13) 



13 Stamens numerous, 3 or more times as many as the petals. .(k) 

 13 Su>r ens few and definite, 4 1-2.. (0 



1-, t^mens (or anthers) 310 times as many as the petals.. (15) 

 ^14 Stamens few and definite. Ovary free from the calyx. . (17) * 



14 Stamens few and definite. Ovary adherent to the calyx.. (J)** 

 15 Stamens hypogy nous inserted on the torus.. (16) 

 15 Stamens perigynous inserted on the corolla at the base. . (c) 

 15 Stamens perigynous inserted on the calyx at the base. . (d) 

 H> Pistils few or many, distinct (at least as to the styles).. (a) 

 16 Pistils (and styles if any) completely united.. (b) 

 17 Pistils one, or indefinite and distinct, simple.. (e) 

 17 Pistils definitely* 2 united, the short styles combined into oe..(f) 

 * 2, 3 or 4 united, styles or stigmas, 2, 3, 4 or 6..(g) 

 * 5. distinct or united, with 5 distinct styles.. (ft) 

 * 5, united and the styles also combined into one..(P 



a Petals 5 or more, deciduous. Leaves never peltate KANUNCULACE.E. 



a Petals 3 or numerous. Water plants with peltate leaves ) 



b Sepals 46, equal. Petals GO, imbricated in the bud. .. I " 



b Sepals 5, equal. Petals 5, imbricate. Leaves tubular SARRACENIACE.E. 8 



b Sepals 5, unequal. Petals 5, convolute. Flowers of 2 sorts CISTACE^E. 15 



b Sepals 2, with bb 5 petals imbricated in the bud PORTULACCACE.E. 20 



bb 4 or 8 petals usually crumpled in bud PAPAYERACE.E. 9 



c Filaments united into a tube. Anthers 1-celled MALVACEAE. 23 



d Sepals 2, persistent, capping the lid of the pyxis PORTULACCACE^E. 2;) 



d Sepals 35, valvate in the bud. Pod long, 2-carpelled TILIACE.E. 25 



d Sepals 3 5. dd Petals imbricate in bud. Fruits simple ROSACES. 44 



dd Petals convolute in bud. Fruit compound LOASACE.E. 55 



Stamens opposite to the petals and of the same number. Pietill only..BERBEKii)ACE.E. G 



t Stamens alternate with the petals or more numerous RANUNCULACR.E. 1 



/ Stamens 6, tetradyuamous. Pod 2-ceiled. Flowers cruciform CRUCIFER^E. 11 



f 8tanens4 32, not tetradynamous. Pod 1-celled CAPPARIDACE^E. 12 



g Sepals 5, unequal. Flowers perfect, numerous, minute CISTACE^K. 15 



g Sepale 5, equal. Flowers monoecious. Herbs woolly or scurfy ORDER 113 



