MONOPETALOUS EXOGKNOLS ThANTS. .'jOO 



VIBURNUM, L. Haw; Sloe. 



Calyx minute, 5-toothed; corolla rotate or somewhat 

 campaiiulate, 5-lobed ; stamens 5 ; ovary 1-3-celled, one 

 of the cells containing a single ovule, the others empty ; 

 driqje baccate, containing a single compressed bony nut. — 

 Shricbs or small trees ; leaves lobed or undivided, the pe- 

 tioles sometimes winged; floiuers in terminal cymes, small, 

 white, the marginal ones occasionally radiant and sterile. 



* sterile and radiant flowers none. 

 t Cymes sessile. 



V. PRUNIFOLIUM, L. Leaves thin, obovate or roundish, 

 mostly obtuse, finely and sharply serrate, smooth and 

 glossy, or the veins beneath and more or less dilated 

 petioles rusty-pubescent; cymes large, 4-5 -rayed ; drupe 

 oblong-ovoid, black. — A small tree ; fruit edible. 



V. Lextago, L. Leaves thin, ovate, acuminate, finely 

 and sharply serrate, smooth above, the lower surface and 

 dilated wavy petioles roughened with minute scales when 

 young ; cymes 4-rayed ; fruit oval, black. May. — A small 

 tree, 



63. MADDER FAMILY. Order, Rubiace^. 



Trees, shrubs, and lierhs ; leaves opposite, somewhat ver- 

 ticillate, entire; stipules between the petioles, sometimes 

 resembling the leaves ; calyx-tube more or less adherent to 

 the ovary ; limb 4 to 5-cleft ; corolla regular, inserted upon 

 the calyx-tube, and of the same number of divisions ; 

 stamens inserted upon the tube of the corolla, equal in 

 number and alternate with its segments ; ovaries 2- (rarely 

 more) -celled ; style single or partly divided ; fr%iit various ; 

 seeds one, few, or many in each cell. 



