CEPHALANTHUS 277 



Cephalanthus occidentalis Linne 1753 Buttonbush 



A shrub, 1-3 m. high; branches glabrous; leaves opposite or verticillate, 

 entire, petioled, ovate or oblong-lanceolate, mostly narrowed at the base, 

 acuminate at the apex, glabrous above, glabrous or very sparingly 

 pubescent beneath, 7-14 cm. long, 4-6 cm. wide; petioles 1-2 cm. long; 

 peduncles axillary and terminal, 6-10 cm. long, heads globose, 2-4 cm. 

 in diameter, flowers white, sessile and closely crowded, 8-12 mm. long, 

 styles slender, about twice as long as the corolla, calyx-tube surmounting 

 the ovary, persistent; fruit narrowly-obconic, 5-6 mm. long: occiden- 

 talis, western. 



In swamps and low grounds, infrequent in the southeastern part of 

 the state, reported as far north as Taylors Falls. Distributed from New 

 Brunswick to western Ontario and California, south to Fla., Tex. and Ariz. 

 Blossoms in June, fruit ripe in September. 



Caprifoliaceae Honeysuckle Family 



Shrubs, trees or vines, or perennial herbs; leaves opposite, simple or 

 pinnately compound ; flowers perfect, regular or irregular, cymose, calyx- 

 tube adherent to the ovary, 2-5-toothed or lobed at the top, petals united 

 into a sympetalous, tubular, campanulate, or rotate corolla, 5-lobed above, 

 frequently with a sack-like enlargement at the base; stamens 5 (rarely 4), 

 borne on the tube of the corolla and alternating with the lobes, anthers 

 oblong or narrow and elongated, filaments inserted on the corolla, ovary 

 inferior, 2-5-celled, style slender, stigma enlarged or capitate, 2-5-lobed, 

 ovules 1 -several in each cell, fruit a 1 -several-seeded berry, drupe or cap- 

 rule, seeds oblong or globose, with small embryo, and fleshy endosperm. 



KEY TO THE GENERA 



1. Leaves compound, flowers small, white, in com- 



pound cymes Sambucus 



2. Leaves simple 



a. Flowers in compound cymes, corolla rotate. 



small; fruit a 1 -seeded drupe Viburnum 



b. Flowers in pairs, or few-flowered racemes or 



cymes, corolla campanulate or tubular, 

 fruit a berry or a capsule 

 ( 1 ) Fruit a few-seeded berry 



(a) Corolla short-campanulate, regular. 



margin of leaves entire Symphoricarpus 



