24 PISONIACEAE. 



Family 1. POLYGONACEAE. Buckwheat Family. 



Plants various in habit. Leaves with manifest, usually sheathing 

 stipules, and inflorescence not involuerate, or the stipules obsolete and the 

 inflorescence involuerate. 



1. COCCOLOBIS P. Br. Shrubs or trees, or rarely vines. Leaves alter- 

 nate, the oereae cylindric or funnelform. Flowers borne in spikes or racemes. 

 Sepals 5, surmounting the accrescent hypanthium. Stamens 8. Stigmas 3, 

 entire. Achene 3-angled, included. — The plants of the following species 

 flower, more or less, throughout the year. 



Leaf-blades longer than wide, narrowed at the base : fruits about 1 cm. thick. 



1. C. laurifolia. 

 Leaf-blades wider than long, cordate at the base : fruits 1.5-2 cm. 



thick. 2. C. uvifera. 



1. C. laurifolia Jacq. Tree: leaf -blades oblong to ovate or obovate, 5-10 cm. 

 long, narrowed or rounded at the base: panicles less than 1 dm. long during 

 anthesis, the lower flower-clusters usually with 3 or 4 pedicels: sepals 2.5-3.5 

 mm. long: hypanthium-margin even between the filaments: fruit globose-ovoid. 



The Pigeon-plum grows on or near the coast of tropical and subtropical 

 Florida, being most common in the hammocks of the Everglade Keys and Florida 

 Keys. The dark-brown or reddish-brown heart-wood is close-grained, very hard, 

 and strong, but brittle. (IF. 7.) 



2. C. uvifera (L.) Jacq. Small tree or shrub: leaf -blades suborbicular, 4-20 

 cm. wide, cordate at the base: panicles over 1 dm. long during anthesis, dense: 

 sepals 2-3 mm. long: fruit subglobose, borne in grape-like clusters. 



The Sea-grape grows in hammocks in the coastal regions of tropical and sub- 

 tropical Florida. The dark-brown or somewhat violet heart-wood is close-grained, 

 very heavy, and hard. (11'. /.) 



Order CHENOPODIALES. 



Herbs, often partially woody, or shrubs or trees. Leaves alternate 

 or opposite, occasionally scale-like. Flowers mostly perfect, sometimes 

 monoecious or dioecious. Calyx usually present, the sepals mainly sep- 

 arate. Corolla wanting, or present and of minute or large petals. Androe- 

 cium of 1-several stamens. Gynoecium of a single carpel or of several 

 united carpels, the ovary mostly superior. Fruit an achene, utricle or a 

 berry, or sometimes an anthocarp. 



Family 1. PISONIACEAE. Pisonia Family. 



Shrubs, trees, or vines. Leaves opposite or alternate : blades simple. 

 Flowers perfect, dioecious or rarely monoecious, cymose. Calyx of 5 

 united sepals, campanulate, tubular, or funnelfoi-m. Corolla wanting. 

 Androecium of 5-30 stamens. Gynoecium 1-carpellaiy. Ovary 1-celled: 

 style terminal. Fruit an anthocarp. 



Fruits angular, with rows of glands : calyx broad. 1. Pisonia. 



Fruits terete, glandless : calyx narrow. 2. Toerubia. 



1. PISONIA [Plum.] L. Armed woody vines, or shrubs or trees. Leaves 

 opposite: blades entire. Flowers in compound cymes. Calyx broadly funnel- 

 form or rotate, with a thin undulate recurved edge. Fruits dry, with rows of 

 glands. 



Library 

 N. C, State Colles:* 



