Variation in floral morphology, histochemistry, and floral visitors of three sympatric morning glory species.

Three morning glory species in the genus Lour., (Choisy) Traiperm & Rattanakrajang, Gagnep & Courchet, and (Kerr) Staples & Traiperm, were found co-occurring and co-flowering. and are rare, while is near threatened and distributed throughout Myanmar and Thailand.

Near extinct and rare are dependent on carpenter bee pollinators.

and are extremely rare plant species. The former had not been seen for nearly 100 years until two individuals were found in Thailand in 2018, and only a handful of populations are known for the latter. The aims of this study were to examine the breeding systems of and using pollination experiments and to determine their potential pollinators via floral observations.

Pollination and Floral Biology of a Rare Morning Glory Species Endemic to Thailand, .

is extremely rare, and very little is known about its reproduction. The species has colorful flowers that seem likely to attract pollinators, but population sizes are typically small (<30 individuals). To determine whether poor reproduction contributes to its rarity, we investigated its mating system and potential pollinators in two populations.