KEY. 199 



Corolla wheel- or urn-shaped. Stigmas sessile. 

 FloTYcrs white, in flat, compound cymes 520 



51 8. Calyx-teeth slender, awl-shaped. Corolla twice as 

 long as the calyx, greenish-yellow. Ovaiy slender, 2-celled 

 (apparently, from the projecting placenta, 4-celled). Fruit 

 a pod. ^ Shrubs about 2 feet high. Leaves opposite, ovate, 

 acuminate, serrate, deciduous. Peduncles axillary and tei-- 

 minal, mostly 3-flowered. Diervilla trifida, Moench. 



Calyx-teeth short. Fruit a berry 5 1-9 



519. Ovary 4-celled, only two of the cells with a fertile 

 ovule. Calyx-teeth and corolla-lobes 5 (or 4). Flowers 

 small, white, tinged with rose-color, in dense short spikes or 

 clusters. Berry globose, white, rarely dark red. Low, erect, 

 branching shrubs. Symphoricarpus (529). 



Ovary 2- to 3-celled. Calyx-teeth and corolla-lobes 

 5, the latter often unequal. Corolla-tube often gibbous at 

 the base. Stamens exserted. Flowers usually showy and 

 fragrant, often in pairs. Berry few-seeded, red, pui"ple, blue, 

 or orange, 2 berries sometimes united into one. Stems 

 climbing, or erect. Leaves opposite, entire, often crenate. 



Ijonicera. 



530. Shrubs with pinnate leaves. Stigmas 3. Ovary 3- 

 celled. Berry 3-seeded, black-purple, or bright red (rarely 

 white). Sambucus. 



Shrubs with simple leaves. Stigmas 1-3. Fruit a 

 1-eelled, 1-seeded drape, blue, black, glaucous, or red. 

 Cymes rarely with marginal neutral flowers, furnished with 

 large, showy corollas. Viburnum. 



531. Stamens distinct 522 



Stamens united into a tube, commonly by their fila 



ments, and always by their anthers. Corolla split down to 

 the base on one side. Flowers axillary, or chiefly in bractcd 

 racemes, red and showy, or blue, variegated with white, com- 

 monly smaller. Leaves alternate. Lobelia. 



533. Leaves alternate 523 



Leaves opposite, large, connate, oval or lanceolate. 

 Calyx-lobes linear-lanceolate, leaf-like. Ovary mostly 3-celled. 

 Fruit a dry drupe, with 3 bony nutlets, crowned with the 

 calyx, orange-colored. Herbs coarse, hairy. Flowers 

 axillary. Triosteum. 



