North America Native Plant

Plateau Rocktrumpet

Botanical name: Mandevilla macrosiphon

USDA symbol: MAMA5

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Macrosiphonia lanuginosa (M. Martens & Galeotti) Hemsl. var. macrosiphon (Torr.) Henrickson, ined. (MALAM)  âš˜  Macrosiphonia macrosiphon (Torr.) A. Heller (MAMA14)  âš˜  Telosiphonia macrosiphon (Torr.) Henrickson (TEMA5)   

Plateau Rocktrumpet: A Rare Texas Native Worth Knowing If you’re passionate about native Texas plants and love discovering botanical gems that most gardeners have never heard of, meet plateau rocktrumpet (Mandevilla macrosiphon). This perennial native is one of those special plants that makes you feel like you’ve uncovered a secret ...

Plateau Rocktrumpet: A Rare Texas Native Worth Knowing

If you’re passionate about native Texas plants and love discovering botanical gems that most gardeners have never heard of, meet plateau rocktrumpet (Mandevilla macrosiphon). This perennial native is one of those special plants that makes you feel like you’ve uncovered a secret – probably because you kind of have!

What Makes Plateau Rocktrumpet Special

Plateau rocktrumpet is a native Texas perennial that belongs to the dogbane family. Unlike its flashy tropical cousins that dominate garden centers, this humble native has been quietly growing in Texas long before European settlers arrived. As a forb herb, it’s a non-woody vascular plant that comes back year after year, making it a reliable addition to native plant gardens.

You might also encounter this plant listed under its scientific synonyms, including Macrosiphonia macrosiphon or Telosiphonia macrosiphon, which can make tracking down information about it feel like a botanical treasure hunt.

Where You’ll Find It Growing Wild

This Texas native is found exclusively in the Lone Star State, making it a true regional specialty. Its common name hints at its preferred habitat – the plateau regions where it has adapted to local growing conditions over thousands of years.

The Challenge (and Appeal) of Growing Plateau Rocktrumpet

Here’s where things get interesting – and a bit challenging. Plateau rocktrumpet is one of those native plants that hasn’t made the leap into mainstream cultivation, which means finding growing information can be tricky. This rarity in the gardening world can be both frustrating and exciting, depending on your perspective.

Why You Might Want to Grow It

  • It’s a true Texas native with deep regional heritage
  • As a perennial, it provides year-after-year garden value
  • You’ll be growing something truly unique that most gardeners have never seen
  • Supporting native plants helps preserve local ecosystems
  • It’s adapted to Texas conditions, potentially making it more resilient once established

Why You Might Want to Skip It

  • Limited availability makes it hard to find
  • Lack of cultivation information means you’ll be experimenting
  • Unknown growth habits make garden planning challenging
  • Better-documented native alternatives might be more practical

If You’re Determined to Try It

Given the limited cultivation information available, growing plateau rocktrumpet will require some detective work and experimentation. Since it’s native to Texas plateaus, you can make educated guesses about its preferences:

  • Likely prefers well-draining soil typical of plateau regions
  • Probably adapted to periods of drought followed by seasonal moisture
  • May need full to partial sun exposure
  • As a native Texas plant, it’s likely hardy in at least some Texas USDA zones

If you do find a source for this plant, start with a small trial area and observe how it responds to your specific garden conditions.

Native Alternatives to Consider

If plateau rocktrumpet proves too elusive or challenging, consider these better-documented Texas native alternatives that might scratch the same itch:

  • Texas rock rose (Pavonia lasiopetala) for drought-tolerant color
  • Flame acanthus (Anisacanthus quadrifidus var. wrightii) for perennial structure
  • Turk’s cap (Malvaviscus arboreus var. drummondii) for unique flowers

The Bottom Line

Plateau rocktrumpet represents the fascinating world of lesser-known native plants that are part of Texas’s natural heritage. While it may not be the easiest plant to grow or find, it offers the thrill of cultivating something truly special and rare. Whether you choose to hunt down this botanical unicorn or opt for more readily available natives, you’ll be contributing to the important work of preserving and celebrating Texas’s natural plant communities.

Remember, every native plant garden is a small act of conservation – and sometimes the most rewarding gardens are the ones that tell stories about the unique places we call home.

Plateau Rocktrumpet

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Asteridae

Order

Gentianales

Family

Apocynaceae Juss. - Dogbane family

Genus

Mandevilla Lindl. - rocktrumpet

Species

Mandevilla macrosiphon (Torr.) Pichon - plateau rocktrumpet

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