The
Hawaiian lobelioids are a group of
flowering plants in the
bellflower family,
Campanulaceae, all of which are
endemic to the
Hawaiian Islands. This is the largest plant
radiation in the Hawaiian Islands, and indeed the largest on any island archipelago, with over 125 species. The six genera can be broadly separated based on growth habit:
Clermontia are typically branched
shrubs or small
trees, up to tall, with fleshy fruits;
Cyanea and
Delissea are typically unbranched or branching only at the base, with a cluster of relatively broad leaves at the apex and fleshy fruits;
Lobelia and
Trematolobelia have long thin leaves down a single, non-woody stem and capsular fruits with wind-dispersed seeds; and the peculiar
Brighamia have a short, thick stem with a dense cluster of broad leaves, elongate white flowers, and capsular fruits.