Question: Are Osbeckia and Miscanthus both plants?

Context paragraphs:
Herbaspirillum frisingense: Herbaspirillum frisingense is a nitrogen-fixing bacterium which was found in C4-fibre plants like prairie cordgrass ("Spartina pectinata"), Chinese silver grass, ("Miscanthus sinensis"), Amur silver-grass ("Miscanthus sacchariflorus"), and Napier grass ("Pennisetum purpureum").  The specific name " frisingense" comes from Freising, a town in Germany where " H. frisingense" was first isolated from prairie cordgrass and "Miscanthus" plants.

Miscanthus: Miscanthus, silvergrass, is a genus of African, Eurasian, and Pacific Island plants in the grass family.

Osbeckia: Osbeckia is a genus of plants in the family Melastomataceae.  It was named by Carl Linnaeus for the Swedish explorer and naturalist Pehr Osbeck (1723–1805).

Supporting paragraphs: Osbeckia Miscanthus
Answer: yes