Blackstonia perfoliat is also known as yellow-work.It is the species of flowering plant and it belongs the family of Cantainaceae.It belongs the kingdom of Plantae.It belong the genus of Blackstonia.It is belongs the family of Gentianaceae.It belongs the order of Gentianales.
It tall about the 10-50 cm,with stiff and branching stems.Its leaves are glaucous.Its calyx is divided 6-10 linear lobes.Its petals number is 6 to 10 and it has short tube.Its species are found in limestone.
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