132 KEY TO NATURAL ORDERS. [chai>. 



PoLYGALACEiE (p. 165). — Trecs, slirubs, or herbs with 

 alternate simple exstipulate leaves. Sepals unequal. Sta- 

 mens usually eight, united below, with the petals adherent 

 to the staminal sheath. 



Caryophyllace/E (p. 166). — Herbs with opposite simple 

 leaves. Ovary one-celled, with a free central placenta. 



Hypericine^ (p. 167). — Herbs, shrubs, or rarely trees, 

 vvith opposite undivided leaves. Flowers hermaphrodite. 

 Calyx imbricate. Stamens indefinite, frequently cohering 

 below in three or more phalanges. 



GuTTiFER^ (p. 168). — Trees or shrubs with a resinous, 

 often coloured, juice, and opposite undivided glabrous 

 leaves. FloAvers unisexual or polygamous. Calyx imbricate. 



TERNSTROMiACEiE (p. 169). — Trecs or shrubs, usually with 

 alternate simple leaves. Flowers hermaphrodite or unisexual. 

 Calyx imbricate. Stamens rarely definite. 



DiPTEROCARPE^ (p. 170). — Trccs or climbing shrubs 

 {Ancistroc/adus), usually resinous, with alternate penni-veined 

 simple leaves. Two or more of the segments of the calyx- 

 limb usually enlarged in fruit. 



Malvaceae (p. 173). — Herbs, shrubs, or trees with 

 alternate simple, frequently palmi-nerved leaves. Calyx-lobes 

 valvate. Stamens monadelphous, with one-celled anthers. 



Sterculiace^ (p. 176). — Trees, shrubs, or herbs with 

 alternate simple or digitate leaves. Calyx-lobes valvate. 

 Stamens monadelphous, indefinite or definite, or free and 

 definite, with or without alternating staminodes ; anthers 

 two-celled. 



TiLiACEiE (p. 177). — Trees, shrubs, or herbs usually with 

 alternate simple leaves. Calyx-lobes valvate. Stamens 

 indefinite, usually free ; anthers two-celled. 



LTNACEi?=: (p. 178). — Shrubs, herbs, or rarely trees, with 

 alternate undivided simple leaves. Sepals imbricate. Sta- 



