I yet think this to be Ipomoea triloba,
Also your other post with lobed leaves, put as I. clarkei, must also be I. triloba.
References for description:
is a species of morning glory
known by several common names, including littlebell
and Aiea morning glory
. It is native to the tropical Americas but it is widespread in warm areas of the world where it is an introduced species
and often a noxious weed
. This is a fast-growing vining annual herb producing long, thin stems with ivylike petioled
, heart-shaped leaves 3 to 6 centimeters long. The leaves sometimes, but not always, have three lobes
. The vines produce tubular bell-shaped flowers each about two centimeters long. They are quite variable in color, in shades of pink, red or lavender with or without white markings.
Leaf simple; blade 3–6 cm, cordate, ± acuminate, entire or 3-lobed, glabrous
Inflorescence: peduncles 1–5-flowered
Flower: sepals ± 8 mm, ± narrowly ovate, acuminate; corolla 1.2–2 cm, narrowly bell-shaped, shallowly 5-lobed
Ecology: Fields, orchards, other disturbed places
Elevation: -34–50 m.
Bioregional distribution: Sonoran Desert
Distribution outside California: native to tropical America