64 KEY AND FLORA 



Flowers in small clusters. Fruit oblong, downy on the sides, ciliate 

 on the edges. On rich soil. Occasionally producing a second set of 

 flowers and fruit from September to November.* 



II. CELTIS L. 



Trees or shrubs with entire or serrate, petioled leaves. 

 Flowers greenish, axillary, on wood of the same season, the 

 staminate in small clusters, the fertile single or 2-3 together.* 



1. C. occidentalis L. Hackberry. A large or medium-sized tree, 

 having much the appearance of an elm, bark dark and rough. 

 Leaves ovate, taper-pointed at the apex, abruptly obtuse and inequi- 

 lateral at the base, sharply serrate, often 3-nerved from the base, 

 smooth above, usually somewhat downy below. Fruit a small, dark- 

 purple drupe. 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 taper-pointed at the apex, 

 obtuse or sometimes heart-shaped at the base, entire or with very 

 few serratures, smooth on both sides, 3-nerved. Fruit a purplish- 

 black, globose drupe.* 



20. MORACE-S:. Mulberry Family 



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

 leaves, large deciduous stipules, and small monoecious or dioe- 

 cious flowers crowded in spikes, heads, or racemes, or inclosed 

 in a fleshy receptacle. Staminate flowers with a usually 4-lobed 

 calyx, and with as many stamens opposite the lobes; filaments 

 usually inflexed in the bud, straightening at maturity. Pistil- 

 late flowers usually 4-sepalous ; ovary 1-2-celled, 1-2-ovuled ; 

 styles 2 ; receptacle and perianth often fleshy at maturity.* 



I. MORUS L. 



Trees or shrubs with milky juice, rounded leaves, and monoe- 

 cious flowers in axillary spikes. Staminate flowers with a 

 4-parted perianth, and 4 stamens inflexed in the bud. Pistil- 

 late flowers with a 4-parted perianth, which becomes fleshy in 

 the multiple fruit, the pulpy part of which consists of the 



