Jacquemontia pentanthos
(Skyblue Clustervine)
Common Names, Latin Name, and Family
Its common names are skyblue clustervine, skyblue jacquemontia, and Key West morning-glory.
The Latin name is Jacquemontia pentanthos.
It is found in the Convolvulaceae, or morning glory, family.
A Swiss botanist, J.D. Choisy (1833), in his monograph of Conulvulaceae created the genus Jacquemontia in honour of Victor Jacquemont, collected from South America … . [1]. Victor Jacquemont was a French naturalist (1801 – 1832).
Form
Skyblue clustervine is an evergreen, perennial, vine that grows 20-30 feet in length.
Leaves
Skyblue clustervine leaves are alternate, with entire margins and are cordate in shape.
They are 4-11 cm long and 3-6 cm wide with long petioles.
Flowers
The flowers are funnel shaped and a brilliant sky blue in color.
The flower cymes (flower clusters) appear at the ends of long peduncles (stems) in clusters of eight to ten.
The flowers appear in fall and winter in central Florida, although in south Florida it is said to bloom all year.
Skyblue clustervine flowers open in the morning and then begin to close by midday.
Fruit / Seeds
The seeds are round capsules that contain four seeds and are ripe once they turn brown and easily break open at their sutures (a line of fusion).
If you are familiar with morning glory seeds then you will know what they look like.
Habitat
It occurs naturally in open forests and hammocks.
Native Range
It is native to Florida, the Caribbean, Central America, Mexico, and Hawaii and can be grown in gardening zones 9 through 11.
Though it is rarely actually found in nature there are a few documented specimens at the USF herbarium for Broward, Collier, Miami-Dade, and Monroe counties.
Landscape Use
In the home landscape it can be grown in part shade to full sun.
If you don’t have a sunny location, the base of the vine can be planted in shade and it will climb upwards to reach sunlight. It will find its way upwards to get enough light to produce flowers.
It is a very strong climber and it twines around its supports very tightly with thick stems.
Skyblue clustervine doesn’t play well with others so it’s best planted on its own because the main stems grow thick and constrict tightly around whatever they use as a support. Its growth habit is almost identical to skunk vine (Paederia foetida) and it actually looks very similar (when not in bloom), except its leaves are alternate and evergreen.
It can be grown umbrella like … growing up and spreading out once it reaches the top of its support. It will tolerate being manicured and trimmed so it can be kept tidier than it generally grows, but it is an ongoing chore. Its growth potential is around twenty to thirty feet so it will make a rather large living umbrella.
I also plant mine at the base of running bamboo stalks and it climbs to the top, spreads out over the tops, and blooms.
Even though it is a south Florida plant it seems to grow quite well for me in central Florida.
Wildlife Use
Skyblue clustervine produces a great deal of nectar and pollen and is visited by bees and butterflies each morning when it is in bloom.
In the morning when the nectar is fresh the flowers are constantly visited by small bees and butterflies, but as the day progresses the pollinator traffic diminishes.
You can tell which honeybees have been on the clustervine all morning because they will have white pollen sacks instead of the usual yellow.
Propagation
Propagation of skyblue clustervine is achieved by cuttings, seeds, and transplants.
Footnote
[1] Gupta, Raj Kumar (1966). “Botanical explorations of Victor Jacquemont (1801-1832)“. Indian Journal of History of Science. 1 (2): 150–157.
Skyblue Clustervine YouTube Video
Click the picture below to watch.
