Create a vintage botanical plate illustration of an imaginary plant species 'Solanum noctilucens'. Include multiple views: full plant, a close-up of the flower, a cross-section of the fruit, and a small cluster of seeds. Add delicate annotation lines and small labels for parts (Leaf, Petal, Stamen, Calyx, Seed). Style: 19th-century naturalist watercolor with off-white paper texture, subtle foxing, and restrained colors. Keep the labels neat and readable.