Learner's definition of MANIFEST. [more manifest; most manifest] formal. 1. : able to be seen : clearly shown or visible. Their sadness was manifest in their faces. His love for literature is manifest in his large library. There was manifest confusion in the streets. The truth was manifest [=(more commonly) obvious] to everyone but me.
From Wikipedia, the free encyclopedia. Convolvulus arvensis (field bindweed) is a species of bindweed in the morning glory family (Convolvulaceae), native to Europe and Asia. It is a climbing or creeping herbaceous perennial plant growing to 0.5â2 m high. There are two varieties: Convolvulus arvensis var. arvensis.
Spotted knapweed was accidentally introduced into North America in the late 1800s in contaminated alfalfa and clover seed and in soil used for ship ballast. In North America, plants generally live 3 to 7 years but can live up to nine years or longer and regrow from buds on the root crown. Reproduction is by seed.