Question: Which goes by the common name of Plumbago: Dillenia or Ceratostigma?
Context: Ali (Arabic: علي‎ ‎ , "ʿAlī ") is a male Arabic name derived from the Arabic root ʕ-l-w, which literally means "high" or "elevated".  It is a common name in Arab countries and the rest of the Muslim world.  Islamic traditional use of the name goes back to the Islamic leader Ali ibn Abi Talib but the name is identical in form and meaning to the Hebrew: עֵלִי‎ ‎ , "Eli", which goes back to the High Priest Eli in the biblical Books of Samuel. Dillenia is a genus of about 100 species of flowering plants in the family Dilleniaceae, native to tropical and subtropical regions of southern Asia, Australasia, and the Indian Ocean islands. Ceratostigma ( ; ), or leadwort, plumbago, is a genus of eight species of flowering plants in the family Plumbaginaceae, native to warm temperate to tropical regions of Africa and Asia.  Common names are shared with the genus "Plumbago". Dryadaula terpsichorella, the dancing moth, is a moth of the Tineidae family.  It is native to south-eastern Polynesia, Samoa and Fiji, but has also been recorded from Hawaii and more recently from Florida and California.  The common name is derived from the characteristic dancelike gyrations it goes through when it alights. Tapinoma melanocephalum is a species of ant that goes by the common name ghost ant. Russula delica is a mushroom that goes by the common name of milk-white brittlegill, and is a member of the "Russula" genus, all of which are collectively known as brittlegills.  It is mostly white, with ochraceous or brownish cap markings, and a short robust stem.  It is edible, but poor in taste, and grows in coniferous, broadleaved, or mixed woods.  It can be confused with other white "Russula" species and certain white "Lactarius" species. 4-Cyano-4'-pentylbiphenyl is a commonly used nematic liquid crystal with the chemical formula CHN.  It frequently goes by the common name 5CB.  5CB was first synthesized by George William Gray, Ken Harrison, and J.A. Nash at the University of Hull in 1972 and at the time it was the first member of the cyanobiphenyls.  The liquid crystal was discovered after Gray's group received a grant from the UK Ministry of Defence to find a liquid crystal that had liquid crystal phases near room temperature with the specific intention of using them in liquid crystal displays.  The molecule is about 20 Å long.  The liquid crystal 5CB undergoes a phase transition from a crystalline state to a nematic state at 18 °C and it goes from a nematic to an isotropic state at 35 °C. Asplenium ruprechtii, which goes by the common name Asian Walking Fern, is a rare, hardy, low-lying fern native to East Asia.  It is a close relative of "Asplenium rhizophyllum" (syn: "Camptosorus rhizophyllus") which is found in North America and also goes by the common name of walking fern.  The species should not be confused with "Asplenium sibiricum" which is a synonym of "Diplazium sibiricum". Plumbago pulchella, with the common name Cola de iguana, is a plant species in the genus "Plumbago". Eremurus robustus is a plant native to the Tien Shan and Pamir Mountains in central Asia that is often used as an ornamental plant.  It often goes by the common name foxtail lily.
Answer: Ceratostigma