POLYGONACEAE. 23 



Leaf-blades of an ovate type. 1. C. georgiana. 

 Leaf-blades of a lanceolate type. 



Leaf-blades sharply serrate, thin. 2. C. Smnllii. 



Leaf-blades entire or nearly so, thick. 3. C. mississippiensis. 



1. C. georgiana Small. Tree becoming 8 m. tall or shrub, the twigs pubes- 

 cent: leaf-blades deep-green, ovate, 2-5 cm. long, rough and sometimes spar- 

 ingly pubescent above, entire or sharply serrate: drupes globose or nearly so, 

 5-7 mm. in diameter, red-purple or tan-colored. 



The Oeorgia-itackberey grows on sandy or rocky river-banks in middle and 

 western Florida. The wood has not yet been studied. (Cont.) 



2. C. Smallii Beadle. Tree becoming 20 m. tall, the twigs glabrous: leaf- 

 blades thin, lanceolate to oblong-lanceolate, 5-10 cm, long, acuminate, some- 

 times with conspicuously elongate tips, sharply and irregularly serrate: drupes 

 subglobose, 5-7 mm. in diameter, purple or purplish. 



Small's-hackberry grows on river-bluffs in western Florida. The wood has 

 not yet been studied. (Cont.) 



3. C. mississippiensis Bosc. Tree becoming 30 m. tall, the twigs sometimes 

 pubescent: leaf-blades thick, lanceolate, varying to ovate-lanceolate or oblong- 

 lanceolate, 6-12 em. long, long-acuminate, entire or nearly so: drupes globose 

 or globose-ovoid, 5-7 mm. in diameter, dark-purple or orange-red. 



The Sugar-berry grows in rich woods and hammocks nearly throughout 

 Florida. The light-yellow heart-wood is close-grained, but soft and rather weak. 

 Also known as Ilackberry. (Cont., Ber.) 



4, TREMA Lour. Unarmed shrubs or trees, the bark smoothish: leaves 



persistent: blades toothed, more or less inequilateral. Calyx rotate, the lobes 



much longer than the tube. Stigmas 2, entire. Drupe ovoid or globose. 



Leaf-blades cordate at the base : anthers over 1 mm. long : drupes yellow or orange. 



1. T. floridana. 

 Leaf-blades obtuse or rounded at the base : anthers less than 



1 mm. long: drupes pink. 2. T. Lamankiana. 



1. T. floridana Britton. Tree 6 m. tall or shrub, with copiously pubescent 

 foliage: leaf-blades ovate, oblong-ovate or lanceolate, 4-10 cm. long, softly 

 pubescent beneath: calyx greenish: drupes subglobose, 2.5-3.5 mm. in diameter, 

 yellow or orange. — All year. 



The Florida-trema grows in burned or cleared hammocks in tropical Florida. 

 The light-brown wood is close-grained, light, soft, and weak. {Endemic.) 



2. T. Lamarckiana (K. & S.) Blume. Small tree or shrub, with finely hirsute 

 or velvety twigs: leaf -blades oblong, lanceolate, or narrowly ovate, mostly 

 1-3 cm. long, finely serrate, scabrous above, veiny-reticulate beneath, obtuse or 

 rounded at the base: calyx whitish or pinkish: drupes ovoid or globose-ovoid, 

 2-2.5 mm. in diameter, pink. 



The West-indiax teema grows in hammocks on the lower Florida Keys. The 

 wood is nearly or quite similar to that of the preceding species. (11'. /.) 



Order POLYGONALES. 



Herbs, shrubs, trees, or vines. Leaves alternate, or sometimes oppo- 

 site or whorled : blades mostly entire : stipules present, usually as a sheath, 

 rarely obsolete. Flowers perfect, monoecious, dioecious, or polygamous, 

 variously disposed. Hypanthium long or short. Calyx of 2-6 sepals, 

 which sometimes develop keels or wings. Corolla wanting. Androecium 

 of 2-9 stamens. Gynoecium of 2 or 3 united carpels, the ovary superior. 

 Fruit an achene. 



