56 ELEMENTS OF BOTANY. 



1. C. occiDEivrTALis L. IIackberry. a large or medium-sized 

 tree having much the appearance of an ehii, bark dark and rough ; 

 leaves ovate, acuminate at the apex, abruptly obtuse and inequilateral 

 at the base, sharply serrate, often o-nerved from the base, glabrous 

 above, usually somewhat pubescent below ; fruit a small, dark purple 

 drupe. March- April. On rich soil. 



2. C. MississippiENSis Bosc. Southern Hackberry. A tree, 

 usually smaller than the preceding, bark gray, often very warty ; 

 leaves broadly lanceolate or ovate, long-acuminate at the apex, 

 obtuse or sometimes cordate at the base, entire or with very few 

 serratures, glabrous on both sides, 3-nerved ; fruit a purplish-black, 

 globose drupe. March- April. 



27. MORACEiE. MULBEKRY FAMILY. 



Trees, shrubs, or herbs, usually witli milky juice, alternate 

 leaves, large deciduous stipules and small monoecious or di(je- 

 cious flowers crowded in spikes or heads or enclosed in a 

 fleshy receptacle ; staminate flowers with a 3-4-lobed calyx, 

 stamens 3-4, inserted on the base of the calyx, filaments 

 usually inflexed in the bud, straightening at maturity ; pis- 

 tillate flowers 3-5-sepalous ; ovary 1-2-celled, 1-2-ovuled ; 

 styles 2, receptacle and perianth often fleshy at maturity. 



I. MORUS. 



Trees or shrubs with milky juice, rounded leaves, and 

 monoecious flowers in axillary spikes ; staminate flowers with 

 a 4-parted perianth, and 4 stamens inflexed in the bud ; pis- 

 tillate flowers with a 4-parted perianth which becomes fleshy 

 in fruit, ovary sessile, stigmas 2, linear, spreading ; the fleshy 

 perianth enclosing the ovary at maturity. 



1. M. RUBRA L. Red Mulberry. A small tree ; leaves cordate- 

 ovate, often 3-5-lobed on vigorous shoots, acuminate at the apex, 

 serrate, rough above, white tomentose beneath ; mature fruiting 

 spikes oblong, drooping, dark red or purple, edible. On rich soil. 

 Flowers March- April ; fruit May-June. AVood very durable, bear- 

 ing exposure to the weather. 



