North America Non-native Plant

Senna Macranthera Var. Micans

Botanical name: Senna macranthera var. micans

USDA symbol: SEMAM

Native status: Not native but doesn't reproduce and persist in the wild

Synonyms: Cassia speciosa Schrad. (CASP32)   

Senna macranthera var. micans: A Lesser-Known Native Plant Variety Meet Senna macranthera var. micans, a botanical mystery that’s likely caught your attention if you’re diving deep into the world of native plants. This particular variety of the Senna genus is one of those plants that makes even experienced gardeners scratch ...

Senna macranthera var. micans: A Lesser-Known Native Plant Variety

Meet Senna macranthera var. micans, a botanical mystery that’s likely caught your attention if you’re diving deep into the world of native plants. This particular variety of the Senna genus is one of those plants that makes even experienced gardeners scratch their heads and reach for their field guides.

What’s in a Name?

While this plant goes by its scientific name Senna macranthera var. micans, it was previously known as Cassia speciosa Schrad. You might also see it referenced under this older botanical classification in some plant databases or older gardening resources. Unfortunately, common names for this specific variety seem to be as elusive as the plant itself!

Where Does It Come From?

Here’s where things get a bit fuzzy. The geographical distribution and native status of Senna macranthera var. micans isn’t well-documented in widely available sources. This is actually pretty common with lesser-known plant varieties – sometimes the botanical world moves faster than the gardening world can keep up with!

Should You Grow It?

Here’s the honest truth: with so little information available about this specific variety, it’s tough to give you a definitive yes or no on whether to add it to your garden. Here’s what we’re working with:

  • Limited cultivation information means you’d be somewhat experimenting
  • Unknown hardiness zones make climate compatibility unclear
  • Uncertain growth habits make garden planning challenging
  • Unknown pollinator and wildlife benefits

The Smart Gardener’s Approach

If you’re determined to explore this particular variety, here are some practical steps:

  • Connect with botanical gardens or native plant societies in your area
  • Research the broader Senna macranthera species for growing clues
  • Start small with just one plant to test how it performs in your garden
  • Document your growing experience to help other gardeners

Consider Well-Known Alternatives

Instead of wrestling with the unknowns of this particular variety, you might want to explore other Senna species that are better documented and more readily available. Many Senna species offer:

  • Beautiful yellow flowers that attract pollinators
  • Interesting seed pods for winter interest
  • Drought tolerance once established
  • Host plant benefits for certain butterfly species

The Bottom Line

Senna macranthera var. micans represents one of those intriguing botanical puzzles that remind us how much we still have to learn about the plant world. While the mystery surrounding this variety makes it challenging to recommend for most home gardens, it also highlights the importance of supporting botanical research and documentation.

If you’re a plant collector with a taste for the unusual and don’t mind a bit of horticultural detective work, this could be an interesting addition to your garden. Just remember to source any plants responsibly and consider starting with better-known native alternatives that can provide reliable beauty and ecological benefits while you’re researching this more elusive variety.

Senna Macranthera Var. Micans

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Senna Mill. - senna

Species

Senna macranthera (Collad.) H.S. Irwin & Barneby

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