Cauliflorous

Cauliflorous is a botanical term describing the characteristic of certain plants to produce flowers, and subsequently fruits, directly from their main trunk, branches, or even from the roots. This phenomenon is in contrast to the more common mode of flowering where blossoms emerge from new growth, shoots, or leaves. The word itself derives from the Latin "caulis" meaning stem or stalk, and "flos" meaning flower.

Plants exhibiting cauliflory are often found in tropical rainforests. This unusual growth habit is thought to have several advantages in such environments. Producing flowers and fruits directly on the trunk can make them more accessible to pollinators, such as bats and monkeys, which are common in these dense habitats and may not easily navigate the upper canopy. Additionally, it may aid in seed dispersal, as fruits hanging directly from the trunk are easily spotted by ground-dwelling animals.

Notable examples of cauliflorous plants include the cocoa tree (Theobroma cacao), the jackfruit (Artocarpus heterophyllus), and the cannonball tree (Couroupita guianensis). While more prevalent in tropical regions, some species in temperate zones may also display limited cauliflory. The development of flowers on older wood requires specialized hormonal signaling within the plant.