52 RUBIACE.E. Viburnum. 



Wood heavy, hard, close-grained, compact, emitting a disagreeable 

 odor; medullary rays thin, barely distinguishable; color dark orange- 

 brown, the sap-wood nearly white. 



159. "Viburnum prunifolium, L. 

 Black Haw. Stag-bush. 



Southern Connecticut and New York, south to middle Florida and the 

 valley of the Colorado River, Texas ; west to Missouri, Arkansas, and the 

 Indian Territory. 



A small tree, sometimes 6 to 9 metres in height, with a trunk rarely 

 exceeding 0.15 metre in diameter, or at the north generally reduced to u 

 low, much-branched shrub ; rocky hillsides in rich soil. 



Wood heavy, very hard, strong, brittle, close-grained, liable to check 

 in drying ; medullary rays numerous, very obscure ; color brown tinged 

 with red, the sap-wood nearly white. 



RUBIACE^E. 



160. Exostema Caribseum, Roem. & Schultes. 



Keys of semi-tropical Florida ; in the West Indies. 



A small tree, sometimes 7 metres in height, with a trunk 0.20 to 0.30 

 metre in diameter. 



Wood very heavy, exceedingly hard, strong, close-grained, checking in 

 drviug. satiny, susceptible of a beautiful polish; medullary rays numerous, 

 very obscure ; color light brown beautifully streaked with different shades 

 of yellow and brown, the sa]>-wood clear rich yellow. 



161. Pinckneya pubens, Michx. 

 Georgia Hark. 



South Carolina, near the coast ; basin of the upper Apalachicola River 

 in Georgia and Florida. 



A small tree, 6 to 9 metres in height, with a trunk 0.15 to 0.30 m< tre 

 in diameter; borders of Btreama and low, sandy swamps j rare and local. 



W 1 light, soft, weak, close-grained, checking badly in drying ; layers 



of annual growth clearly marked by four to six rows of large open duets; 

 medullary rays few, obscure; color brown, the sap-wood lighter. 



Infusions of the bark are successfully used in the treatment of inter- 

 mittent fever, as a substitute for cinchona. 



162. Genipa clusisefolia, Griseb. 



Seven-year Apple. 



Southern keys of semi-tropical Florida ; in the Wist Indies. 



A small, much-branched, knotty tree, sometimes 6 metres in height, 





