Keywords: Exostemma subcordatum 135-8274.jpg Exostema subcordatum Rubiaceae Curtis's Botanical Magazine London vol 135 ser 4 vol 5 Tab 8274 - http //www botanicus org/page/469730 1909 M S del J N Fitch lith PD-Art Curtis's Botanical Magazine Volume 135 8274 Exostema subcordatum |