224 ELEMENTS OF BOTANY. 



II. VIBURNUM. 



Shrubs or small trees ; leaves simple, entire, dentate or 

 lobed, stipulate or exstipulate; flowers small, white, in termi- 

 nal cymes, the outer flowers of the cyme sometimes greatly 

 enlarged and sterile ; calyx tube very small, 5-toothed ; corolla 

 rotate or campanulate, 5-lobed; stamens 5, inserted in the 

 tube of the corolla ; ovary 1-3-celled, 1-3-ovuled but only 1 

 ovule maturing, style short, 3-lobed ; fruit a 1-seeded drupe. 



1. V. ACERiFOLiUM L. Maple-leaved Arrow-wood. A slen- 

 der shrub 3-6 ft. high ; leaves broadly ovate to cordate, palmately 

 veined and 3-lobed, serrate or nearly entire, petioled, pubescent, 

 becoming smooth above ; cymes peduncled, about 7-rayed, '2-3 in. 

 wide ; sterile flowers none ; fruit oval, black, stone flat, 2-ridged on 

 the edges. May-June. In dry, open woods. 



2. V. DENTATUM L. Arrow-wood. A shrub 8-15 ft. high ; 

 leaves broadly ovate to oval, acute at tlie apex, rounded or cordate 

 at the base, coarsely dentate, smooth above, hairy in the axils of 

 the veins beneath, short-petioled : cymes long-peduncled, 7-rayed, 

 2-3 in. wide ; sterile flowers none : calyx smooth ; fruit globose, 

 dark blue, stone compressed, grooved on one side. ]\Iarch-May. 

 In rich, damp soil. 



o. V. NUDUM L. AYiTHE-ROD. A shrub 8-12 ft. high ; leaves 

 ovate to lanceolate, entire or slightly toothed, acute at both ends, 

 thick, smooth al)Ove, the veins prominent beneath ; petiole short ; 

 cymes short-peduncled, 5-rayed ; sterile flowers none ; fruit ovoid, 

 blue. April-May. Common in swamps. 



4. Y. scABRELLUM T. & G. RouGH Arrow-wood. A shrub 

 8-12 ft. high ; leaves ovate to nearly orbicular, acute at the apex, cor- 

 date, rounded or cuneate at the base, coarsely serrate, thick, stellate- 

 tomentose lieneath, short-petioled ; cymes peduncled, 7-rayed ; calyx 

 and corolla hairy ; fruit globose, dark blue. ]\Iay-fTune. Swamps 

 and river banks. 



5. V. PRUNiFOLiUM L. Black Haw. A small tree 15-20 ft. 

 high ; leaves oval to ovate, acute or obtuse at each end, finely and 

 sharply serrate, smooth and shining above, often slightly pubescent 

 beneath ; petioles dilated and rusty-pubescent ; cymes sessile, large, 

 4-5-rayed ; sterile flowers none ; drupe oval, bluish-black, edible. 

 April-May. In rich, moist woods. 



