28. KEY TO THE FAMILIES. 



316. Stamens 10—30. Tree. (Euclea). 123 EBENACEAE. 

 Stamens less than 10. 317. 



317. Flowers regular or nearly so. 318. 

 Flowers more or less irregular. 324. 



318. Leaves opposite, or whorled, or compound, or stamens 2. 319. 

 Leaves alternate, usually simple. Stamens more than 2. 32l. 



319. Corolla contorted. Ovules numerous. 



126 GENTIANACEAE. 

 Corolla valvate or imbricate, but not contorted. 320. 



320. Stamens 2. Not epiphytic. 124 OLEACEAE. 

 Stamens 5. Epiphytic on trees. (Dermatobotry»). 



134 SCROPHULARIACEAE. 



321. Ovules 2 in each ovary cell. 129 CONVOLVULACEAE. 

 Ovules more than 2 in each ovary cell. 322 



322. Tufted, usually submerged aquatic. (Limnanthemum). 



126 GENTIANACEAE. 

 Not aquatic. 323. 



323. Stamens free from corolla. (Lightfootia). 



146 CAMPANULACEAE. 

 Stamens attached to corolla. SOLANACEAE. 



324. Fruit 2 horned or its cells incompletely divided by false 



septa. Lower leaves often opposite. Plants with glandu- 

 lar hairs. Endosperm scanty. 137 PEDALIACEAE. 

 Not as for Pedaliaceae. 325. 



325. Leaves simple. Seeds endospermic. 



134 SCROPHULARIACEAE. 

 Leaves compound, seeds exendospermic. 



136 BIGNON1ACEAE. 



326. (306) Ovule 1 in each ovary cell. 327. 

 Ovules 2 or more in each ovary cell. 334. 



327. Stamens as many as,, and alternating with, corolla lobes or 



fewer. 328. 



Stamens as many as, and opposite corolla lobes, or more. 332. 



328. Flowers unisexual regular. Petals united only at base. 



Tree. (Ilex). M AQUIFOLIACEAE. 

 Flowers hermaphrodite, rarely polygamous. 329. 



329. Corolla with valvate or folded aestivation. 



129 CONVOLVULACEAE. 

 Corolla imbricate or contorted. 330. 



330. Stamens as many as corolla lobes. Leaves usually alternate. 



Flowers more or less regular. 130 BORRAGINACEAE. 



Stamens usually fewer than corolla lobes. Leaves usually 



opposite. 331. 



331. Ovary deeply divided. Fruit dry. 132 LABIATAE. 

 Ovary entire, or if not, fruit succulent. 



131 VERBENACEAE. 



