North America Native Plant

Slender Passionflower

Botanical name: Passiflora filipes

USDA symbol: PAFI6

Life cycle: perennial

Habit: vine

Native status: Native to the lower 48 states  

Slender Passionflower: A Rare Texas Native Worth Knowing About Meet the slender passionflower (Passiflora filipes), one of Texas’s lesser-known native treasures that’s quietly making its mark in the world of native gardening. While its famous cousin, the purple passionflower, gets all the attention, this delicate perennial deserves a spot on ...

Slender Passionflower: A Rare Texas Native Worth Knowing About

Meet the slender passionflower (Passiflora filipes), one of Texas’s lesser-known native treasures that’s quietly making its mark in the world of native gardening. While its famous cousin, the purple passionflower, gets all the attention, this delicate perennial deserves a spot on your radar if you’re passionate about authentic regional flora.

What Makes Slender Passionflower Special?

Don’t let the name fool you – while it’s called slender, this native Texan packs plenty of character. As a forb (that’s garden-speak for a non-woody flowering plant), Passiflora filipes brings the classic passionflower charm in a more petite package. Unlike its woody climbing relatives, this perennial grows as an herbaceous plant, dying back to the ground each winter and emerging fresh each spring.

Where You’ll Find It Growing Wild

The slender passionflower is a true Texas native, naturally occurring throughout the Lone Star State. This makes it perfectly adapted to local conditions and an excellent choice for gardeners wanting to support regional ecosystems.

The Challenge of Growing Slender Passionflower

Here’s where things get a bit tricky – and honestly, pretty exciting if you’re the type of gardener who loves a good mystery. Passiflora filipes is one of those plants that keeps its secrets well. Information about its specific growing requirements, exact appearance, and garden behavior is surprisingly scarce, even among native plant specialists.

This scarcity of information could mean a few things:

  • It might be quite rare in the wild
  • It could be easily confused with other passionflower species
  • It may have very specific habitat requirements
  • Research on this particular species has been limited

Should You Try Growing It?

If you can actually find slender passionflower (and that’s a big if), it could be a fascinating addition to a native Texas garden. As a member of the passionflower family, it likely shares some family traits – potentially offering nectar for pollinators and serving as a host plant for certain butterfly species.

However, given the limited availability and information, you might want to consider these well-documented Texas native alternatives:

  • Purple passionflower (Passiflora incarnata) – the showstopper with stunning flowers
  • Yellow passionflower (Passiflora lutea) – a charming climber with tiny blooms
  • Red passionflower (Passiflora coccinea) – if you can find it

The Bottom Line

Slender passionflower represents one of those intriguing gaps in our gardening knowledge. While it’s undoubtedly a legitimate Texas native with potential garden value, the lack of readily available information and plant material makes it more of a specialist’s quest than a beginner’s project.

If you’re determined to track down this elusive native, your best bet is connecting with native plant societies, botanical gardens, or specialized native plant nurseries in Texas. They might have leads on where to find authentic specimens or seeds – just make sure any plants you acquire are responsibly sourced from ethical suppliers.

Sometimes the most rewarding plants are the ones that require a little detective work to find!

Slender Passionflower

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Dilleniidae

Order

Violales

Family

Passifloraceae Juss. ex Roussel - Passion-flower family

Genus

Passiflora L. - passionflower

Species

Passiflora filipes Benth. - slender passionflower

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