Native Plants

Arsene’s Buttercup

Ranunculus petiolaris var. arsenei

USDA symbol: RAPEA2

perennial forb

Lower 48 states: native

If you’re on the hunt for truly unique native plants for your Southwestern garden, let me introduce you to Arsene’s buttercup (Ranunculus petiolaris var. arsenei). This charming little perennial is one of those botanist’s treasures – a plant that’s fascinating precisely because it’s not plastered all over every garden center ...

Arsene’s Buttercup: A Lesser-Known Native Gem for Southwestern Gardens

If you’re on the hunt for truly unique native plants for your Southwestern garden, let me introduce you to Arsene’s buttercup (Ranunculus petiolaris var. arsenei). This charming little perennial is one of those botanist’s treasures – a plant that’s fascinating precisely because it’s not plastered all over every garden center shelf.

What Makes Arsene’s Buttercup Special?

Arsene’s buttercup is a native perennial forb, which is just a fancy way of saying it’s a soft-stemmed herbaceous plant that comes back year after year. Unlike woody shrubs or trees, this little beauty puts all its energy into gorgeous above-ground growth during the growing season, then retreats to its roots when conditions get tough.

As a member of the buttercup family, you can expect the characteristic bright, cheerful flowers that make these plants so beloved. While the specific details about flower size and exact appearance of this variety are limited in cultivation guides, buttercups are generally known for their glossy, vibrant yellow petals that seem to glow in the garden.

Where Does It Call Home?

This native beauty has a rather exclusive address – you’ll find Arsene’s buttercup growing wild in just two states: Arizona and Texas. It’s perfectly adapted to the unique conditions of the American Southwest, making it an excellent choice for gardeners in these regions who want to work with nature rather than against it.

  • Species observed
  • No observations

Why Consider Growing Arsene’s Buttercup?

Here’s where things get interesting – and a bit mysterious. While this plant is definitely a legitimate native species, it’s what I like to call a sleeper native. There’s limited information about its specific cultivation needs, which means it’s either:

  • Incredibly easy to grow and doesn’t need much fussing over
  • So specialized in its needs that it’s primarily of interest to native plant purists and restoration projects
  • Simply overlooked by the gardening world (which happens more than you’d think!)

The Challenge of Growing Lesser-Known Natives

Let’s be honest here – if you’re looking for detailed growing guides, planting zones, and step-by-step care instructions, Arsene’s buttercup might not be your best starting point for native gardening. The horticultural world hasn’t caught up with documenting every beautiful native variety out there.

However, if you’re an adventurous gardener who loves the idea of growing something truly unique and supporting local ecosystems, this could be right up your alley. Native plants are generally more drought-tolerant, require fewer inputs, and support local wildlife better than non-native alternatives.

What We Do Know

Based on its native range in Arizona and Texas, Arsene’s buttercup likely prefers:

  • Hot, dry summers (it’s Southwestern, after all)
  • Well-draining soils
  • Full to partial sun
  • Minimal supplemental watering once established

As a perennial forb, it probably goes dormant during the harshest part of the year and emerges when conditions improve – a smart survival strategy for desert and semi-desert plants.

Should You Grow It?

If you live in Arizona or Texas and you’re passionate about native plants, Arsene’s buttercup could be a wonderful addition to a naturalized garden or restoration project. However, you might want to start with better-documented native buttercup species or other Southwestern natives while you hunt for seeds or plants of this particular variety.

For most home gardeners, I’d recommend beginning with well-known native alternatives like desert marigold, brittlebush, or other established native wildflowers that offer similar ecological benefits with more readily available growing information.

The Bottom Line

Arsene’s buttercup represents the wonderful diversity of our native flora – even if we don’t have all the gardening details figured out yet. Sometimes the most rewarding gardening adventures come from working with plants that don’t have Instagram-famous followings. If you’re up for the challenge and can source it responsibly, this little native could be a unique jewel in your Southwestern garden.

Just remember: when working with lesser-known natives, observation is your best friend. Watch how it responds, take notes, and maybe you’ll become one of the first to really document how this charming buttercup behaves in cultivation!

Ranunculus petiolaris var. arsenei is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Ranunculus petiolaris var. arsenei is also known as:

Ranunculus fasciculatus Sessé & | USDA symbol: RAFA8
Ranunculus macranthus Scheele var. arsenei | USDA symbol: RAMAA

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Magnoliidae
Order: Ranunculales
Family: Ranunculaceae Juss. - Buttercup family
Genus: Ranunculus L. - buttercup

Species: Ranunculus petiolaris Kunth ex DC. - Latin American buttercup

Variety: Ranunculus petiolaris Kunth ex DC. var. arsenei (L.D. Benson) T. Duncan - Arsene's buttercup

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