Commelina diffusa var. gigas
Annals of the Missouri Botanical Garden 80: 213. 1993.
Herbs, perennial, robust, spreading, sometimes scrambling in shrubs. Leaves: blade narrowly lanceolate to lanceolate-elliptic, 6–14 × 1–3.3 cm, apex acuminate. Inflorescences: distal cyme usually exserted, 1–3-flowered; proximal cyme 2–5-flowered; spathes pedunculate, falcate, 2.3–4 × 0.5–1.1 cm, apex acuminate; peduncles 1–2 (–4) cm. Flowers blue; medial stamen anther connective without dark band. Capsules 3-locular, 2-valved. Seeds typically only 1–2 developing, dark-brown, 2.1–2.8 mm, deeply reticulate. 2n = 90.
Phenology: Flowering spring–fall (perhaps all year round).
Habitat: Hammocks, streamsides, ditches, cypress swamps, wet woods, and lake shores
Distribution
Introduced; Fla., Asia
Discussion
Commelina diffusa is a very variable species throughout its vast range. I have not been able to match C. diffusa var. gigas with specific herbarium specimens from elsewhere. It probably arrived as an introduction instead of arising from diploid C. diffusa through in situ autopolyploidy.