North America Native Plant

Poole’s Starviolet

Botanical name: Stenaria mullerae var. pooleana

USDA symbol: STMUP

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Hedyotis pooleana B.L. Turner (HEPO11)   

Poole’s Starviolet: A Rare Texas Native Worth Knowing About Meet Poole’s starviolet (Stenaria mullerae var. pooleana), one of Texas’s most elusive native wildflowers. If you’ve never heard of this little perennial forb, you’re not alone – it’s so rare that even seasoned native plant enthusiasts might do a double-take at ...

Rare plant alert!

Region: Conservation status by state

Status: S1Q: Status is uncertain but is somewhere between the following rankings: Uncertain taxonomy: ⚘ Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘

Poole’s Starviolet: A Rare Texas Native Worth Knowing About

Meet Poole’s starviolet (Stenaria mullerae var. pooleana), one of Texas’s most elusive native wildflowers. If you’ve never heard of this little perennial forb, you’re not alone – it’s so rare that even seasoned native plant enthusiasts might do a double-take at the name. But sometimes the most obscure plants have the most interesting stories to tell.

What Exactly Is Poole’s Starviolet?

Poole’s starviolet is a perennial forb, which means it’s a non-woody flowering plant that comes back year after year. As a member of the vast world of herbaceous plants, it lacks the woody stems of shrubs and trees, instead dying back to its roots during dormancy and emerging fresh each growing season.

You might occasionally see this plant listed under its botanical synonym, Hedyotis pooleana, which can add to the confusion when trying to track down information about it. But whether you call it Stenaria or Hedyotis, you’re talking about the same mysterious little Texas native.

Where Does It Call Home?

This native beauty is found exclusively in Texas, making it a true Lone Star State endemic. As a plant native to the lower 48 states with such a limited range, Poole’s starviolet represents the kind of specialized local flora that makes Texas botanically fascinating.

The Rarity Factor: Why This Matters

Here’s where things get serious: Poole’s starviolet carries a Global Conservation Status of S1Q, indicating it’s extremely rare and its status is somewhat uncertain. This isn’t your typical garden center find, and for good reason – this plant exists in very limited populations and requires special consideration.

If you’re interested in growing Poole’s starviolet, it’s crucial to source any plants or seeds only through responsible channels that don’t impact wild populations. Never collect from the wild, and always verify that any commercial sources are propagating from ethically obtained stock.

Should You Grow Poole’s Starviolet?

The honest answer is: probably not, unless you’re a serious native plant conservationist or researcher. Here’s why:

  • Extremely limited availability of plants or seeds
  • Virtually no documented cultivation information
  • Unknown growing requirements and care needs
  • Conservation concerns about removing pressure from wild populations

However, if you’re passionate about Texas native plant conservation and have access to responsibly sourced material, growing this rare species could contribute to important conservation efforts.

The Mystery of Growing Conditions

Unfortunately, specific information about Poole’s starviolet’s preferred growing conditions, USDA hardiness zones, and care requirements remains largely unknown in horticultural literature. This lack of cultivation information is common among very rare native plants that haven’t been brought into mainstream horticulture.

What we can infer from its Texas native status is that it likely prefers conditions similar to other Texas forbs, but without specific research, any growing advice would be speculation.

Alternative Texas Natives to Consider

Since Poole’s starviolet isn’t practical for most gardeners, consider these more available Texas native forbs that can provide similar ecological benefits:

  • Texas bluebonnet (Lupinus texensis)
  • Indian paintbrush (Castilleja species)
  • Turk’s cap (Malvaviscus arboreus var. drummondii)
  • Wild bergamot (Monarda fistulosa)

The Bigger Picture

Poole’s starviolet serves as a fascinating reminder of how much botanical diversity exists in Texas, much of it still poorly understood. While this particular plant may not end up in your garden, its story highlights the importance of supporting native plant research and conservation efforts.

Sometimes the plants we can’t grow teach us just as much as the ones we can – they remind us that our landscapes are part of larger ecosystems filled with species we’re still learning about, each with their own role to play in the intricate web of native biodiversity.

Poole’s Starviolet

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

Rubiales

Family

Rubiaceae Juss. - Madder family

Genus

Stenaria Raf. ex Steud. - diamond-flowers

Species

Stenaria mullerae (Fosberg) Terrell - Muller's diamond-flowers

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