The Voynich Botanical Plants

Folio 3r, Feathery amaranth (Celosia argentea), is a widespread weed throughout tropical Africa. It is primarily used in Africa as a leafy vegetable for soups, sauces, or stews. Celosia has plume-like flowers ranging in color from dark-crimson to orange and golden-yellow making it a useful bedding and pot plant (Prota Database). Another possibility for Folio 3r is croton (Codiaeum variegatum), a native of Southern Asia.