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Ipomoea indica
The Morning Glory, in the family Convolvulaceae, contains at least 50 genera and more than 1000 species. Morning Glories are vines, with flowers that are saucer-shaped, opening at morning time. Some species develop thick roots and long, creeping stems. They tend to grow in dense thickets, quickly spreading, crowding out, blanketing and smothering other plants, which turned them into a serious invasive weed problem. First ID was Ipomoea nil (L.) Roth and changed to Ipomoea indica (Burm. f.) Merr.. Ipomoea indica is a species of flowering plant known by several common names, including Island Morning Glory, Blue Morning Glory, Oceanblue Morning Glory, Koali Awa, and Blue Dawn Flower. Originating in the tropics, this twining vine grows vigorously, especially in moist sheltered areas. Most often seen in neglected gardens and bushland edges, it smothers understorey plants and even large trees in its quest for light.
Spotted in the garden of Monte Maria, a church located on a hill near a vast pasture land in Alfonso Cavite, just outside Tagaytay.
Reference: http://www.theflowerexpert.com/content/a... http://www.iewf.org/weedid/Ipomoea_indic...
Ipomoea nil can be very difficult to differentiate from IPomoea indica unless the viewer is very familiar with the details of both species.
I have grown both and examined them in fine detail.