North America Native Plant

Cupped Passionflower

Botanical name: Passiflora bryonioides

USDA symbol: PABR4

Life cycle: perennial

Habit: vine

Native status: Native to the lower 48 states  

Cupped Passionflower: Arizona’s Rare Native Gem Meet the cupped passionflower (Passiflora bryonioides), one of Arizona’s lesser-known native treasures. While most gardeners are familiar with the showier members of the passionflower family, this humble perennial represents a unique piece of the Southwest’s botanical heritage that deserves recognition, even if it’s not ...

Cupped Passionflower: Arizona’s Rare Native Gem

Meet the cupped passionflower (Passiflora bryonioides), one of Arizona’s lesser-known native treasures. While most gardeners are familiar with the showier members of the passionflower family, this humble perennial represents a unique piece of the Southwest’s botanical heritage that deserves recognition, even if it’s not likely to show up at your local nursery anytime soon.

What Makes This Plant Special

The cupped passionflower is a perennial forb—basically a non-woody plant that comes back year after year. Unlike the vigorous vines that most people associate with passionflowers, this Arizona native has a more restrained growth habit. It’s classified as an herb, meaning it lacks the significant woody tissue that you’d find in shrubs or trees, with its growing points staying close to or below ground level.

Where You’ll Find It (Or Won’t)

This passionflower calls Arizona home and is native to the lower 48 states. However, don’t expect to stumble across it on your next desert hike—it’s quite rare in the wild and even rarer in cultivation.

The Reality Check: Should You Grow It?

Here’s where things get honest: while the cupped passionflower sounds intriguing, it’s not your typical garden center find. This species is so uncommon that specific growing information is scarce, and sourcing plants or seeds can be nearly impossible through traditional channels.

If you’re passionate about Arizona natives and happen to come across this species through specialized native plant societies or botanical institutions, approach it with the respect it deserves as a rare plant. Only consider growing it if you can verify the source is responsible and not contributing to wild collection.

Growing Conditions (Best Guess Edition)

Since specific care information for Passiflora bryonioides is limited, we can make educated assumptions based on its Arizona origins and passionflower family traits:

  • Likely prefers well-draining soil (essential for most Arizona natives)
  • Probably tolerates drought once established
  • May appreciate some afternoon shade in extreme desert conditions
  • As a perennial, it should return each growing season

The Bigger Picture

While the cupped passionflower might not become the star of your garden, learning about rare natives like this one helps us appreciate the incredible diversity of plants that call our regions home. These lesser-known species often play important ecological roles that we’re still discovering.

If you’re drawn to the idea of growing passionflowers, consider more readily available native options in your area, or well-behaved non-native species that won’t compete with local flora. Your local native plant society can point you toward suitable alternatives that capture the unique appeal of the passionflower family while being more practical for home gardening.

The Bottom Line

The cupped passionflower represents the kind of botanical mystery that makes native plant enthusiasts’ hearts skip a beat. While it may not be destined for mainstream gardening, knowing about species like this reminds us that there’s always more to discover in the plant world—sometimes right in our own backyards.

Cupped 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 bryonioides Kunth - cupped passionflower

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