Non-native Plants

Obscure Morning-glory

Ipomoea obscura

USDA symbol: IPOB

perennial vine

Hawaii: non-native, naturalized

If you’ve stumbled upon the name obscure morning-glory, you’re probably wondering what exactly this plant is and whether it belongs in your garden. Well, you’ve discovered one of the more mysterious members of the morning-glory family – Ipomoea obscura – and obscure certainly lives up to its name! Obscure morning-glory ...

Obscure Morning-Glory: A Little-Known Tropical Vine

If you’ve stumbled upon the name obscure morning-glory, you’re probably wondering what exactly this plant is and whether it belongs in your garden. Well, you’ve discovered one of the more mysterious members of the morning-glory family – Ipomoea obscura – and obscure certainly lives up to its name!

What is Obscure Morning-Glory?

Obscure morning-glory (Ipomoea obscura) is a perennial flowering plant that belongs to the diverse Ipomoea genus, which includes hundreds of morning-glory species worldwide. Unlike its woody cousins, this plant is classified as a forb or herb, meaning it lacks significant woody tissue and dies back to ground level, with its growing points located at or below the soil surface.

Where Does It Grow?

Currently, Ipomoea obscura is found growing in Hawaii, where it has established itself as a non-native species. This means it was introduced from somewhere else and now reproduces on its own in the wild without human assistance. The plant has proven it can persist in Hawaii’s tropical climate, suggesting it’s quite adaptable to warm, humid conditions.

  • Species observed
  • No observations

Garden Suitability and Considerations

Here’s where things get a bit tricky for gardeners. While obscure morning-glory can grow in both wetland and non-wetland conditions (making it quite flexible), there’s a significant gap in available information about this particular species. We simply don’t have enough data about:

  • Its potential invasive behavior
  • Specific growing requirements
  • Mature size and growth rate
  • Pollinator or wildlife benefits
  • Hardiness zones beyond tropical Hawaii

The Case for Caution

Given the limited information available about Ipomoea obscura, most gardeners would be wise to consider well-documented alternatives, especially native plants that support local ecosystems. The morning-glory family includes some notorious invasive species, and without clear data on this particular plant’s behavior, it’s better to err on the side of caution.

Native Alternatives to Consider

Instead of obscure morning-glory, consider these well-documented native alternatives that offer similar vine-like beauty:

  • Native morning-glories specific to your region
  • Native honeysuckles (Lonicera species)
  • Regional native climbing plants that support local wildlife

The Bottom Line

While obscure morning-glory might sound intriguing, its very name hints at why it might not be the best garden choice – we simply don’t know enough about it! The lack of readily available growing information, combined with its non-native status, suggests that gardeners passionate about supporting local ecosystems would be better served by choosing native plants with proven track records.

If you’re drawn to the morning-glory family, research native Ipomoea species in your area or consult with local native plant societies. They can guide you toward similar plants that will thrive in your garden while supporting the birds, bees, and butterflies that call your region home.

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" — matching plants to their ideal growing conditions, so they'll thrive with less care and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection can be if you don't have the right information. While tags on nursery plants list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. You might be surprised to learn that popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. The table below gives insight into the preferred growing conditions of this plant throughout its geographical distribution.

Region
Preferred Habitat

Hawaii ()

Facultative
Wetland Glossary
Obligate Wetland
Facultative Wetland
Facultative
Facultative Upland
Obligate Upland
Almost always occurs in wetlands
Usually occurs in wetlands but may occur in non-wetlands
Can occur in wetlands and non-wetlands
Usually occurs in non-wetlands but may occur in wetlands
Almost never occurs in wetlands

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Asteridae
Order: Solanales
Family: Convolvulaceae Juss. - Morning-glory family
Genus: Ipomoea L. - morning-glory

Species: Ipomoea obscura (L.) Ker Gawl. - obscure morning-glory

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA