POLYPETALOUS EXOGENOUS PLANTS. 205 



the bud; the stamens us many as the petals (4 or 5) and 

 alternate with them, inserted on a thick expansion of the 

 receptacle {disk) which fills the bottom of the calyx. Pod 

 colored, of 2 to 5 mostly 1-seeded cells ; showy when ripe 

 in autumn, especially when they open and display the seeds 

 enveloped in a pulpy scarlet aril. 



EUONYMUS, L. Spindle Tree. 



Floiuers perfect ; calyx flat, 4-5-cleft ; petals 4-5, 

 spreading ; stamens 4-5, very short, inserted with the pe- 

 tals under the broad and fleshy disk which surrounds the 

 ovary; ovary 3-5-celled, with 2 erect or resupinate ovules 

 in each cell; style very short; capsule 3-5-celled, locu- 

 licidally 3-5-valved ; seed enclosed in a red pulpy aril. 

 Erect or trailing shrubs, with 4-angled branches, opposite 

 serrate leaves, txw^ greenish or purplish /02^er5 in axillary 

 peduncled cymes. 



E. Americanus, L. {Straivherry Bush.) Floioers 

 greenish, pentamerous; peduncles 1-3-flowered; capsule 

 warty ; leaves short-petioled, varying from ovate or obovate 

 to linear-lanceolate, serrulate. — Shrub, 3°-6° high; leaves 

 l'-2' long. 



E. ATROPURPUREUS, Jaq. Flowers purple, tetramerous ; 

 peduncles many-flowered ; capsule smooth ; leaves oblong on 

 rather long petioles, serrulate. — Shrub, 8°-12° high ; leaves 

 2'-5' long; flowers dark purple. 



CELASTRUS. Staff Tree. 



Floivers somewhat dioecious ; calyx cup-shaped, 5-cleft; 

 petals 5, spreading; stamens 5, inserted with the petals 

 into the edge of the cup-shaped fleshy disk which tills the 

 tube of the calyx, abortive in the fertile flower; ovary 

 2-4-celled, the cells 2-ovuled ; style thick ; capstde glo- 



