North America Native Plant

Glandular Rose

Botanical name: Rosa myriadenia

USDA symbol: ROMY

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Glandular Rose: A Rare Oregon Native Worth Protecting Meet Rosa myriadenia, commonly known as the glandular rose – a plant so rare and elusive that it’s practically the botanical equivalent of finding a unicorn in your backyard. This diminutive native rose calls Oregon home, but don’t expect to stumble across ...

Rare plant alert!

Region: Conservation status by state

Status: S1S3Q: 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) ⚘ Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Glandular Rose: A Rare Oregon Native Worth Protecting

Meet Rosa myriadenia, commonly known as the glandular rose – a plant so rare and elusive that it’s practically the botanical equivalent of finding a unicorn in your backyard. This diminutive native rose calls Oregon home, but don’t expect to stumble across it on your next hiking adventure.

What Makes This Rose Special?

The glandular rose is a perennial shrub that stays refreshingly compact, typically growing under 1.5 feet tall and never exceeding 3 feet at maturity. Unlike its showier rose cousins that demand center stage in formal gardens, this little native prefers to keep a low profile – quite literally.

Native Status and Where It Grows

Rosa myriadenia is native to the lower 48 states, specifically found in Oregon. Its limited geographic distribution makes it a true Pacific Northwest treasure, though one that’s incredibly difficult to encounter in the wild.

A Word of Caution: Rarity Status

Here’s where things get serious, fellow plant enthusiasts. The glandular rose has a Global Conservation Status of S1S3Q, which indicates both extreme rarity and some taxonomic uncertainty. In plain English? This plant is so uncommon that scientists aren’t entirely sure about all aspects of its classification, and it’s teetering on the edge of being exceptionally rare.

What does this mean for gardeners? If you’re lucky enough to find Rosa myriadenia available through specialty native plant nurseries, proceed with extreme caution and responsibility.

Should You Plant Glandular Rose?

The short answer is: probably not, unless you’re a dedicated native plant conservationist with access to ethically sourced material. Here’s why:

  • Its rarity means wild populations need protection, not disturbance
  • Very little is known about its specific growing requirements
  • Cultivation information is virtually non-existent
  • Seeds or plants should only come from reputable conservation nurseries

Better Alternatives for Your Garden

If you’re drawn to the idea of growing native roses in Oregon, consider these more readily available alternatives:

  • Rosa nutkana (Nootka rose) – a robust native with showy pink flowers
  • Rosa woodsii (Woods’ rose) – excellent for naturalizing and wildlife habitat
  • Rosa pisocarpa (cluster rose) – perfect for informal native landscapes

Conservation Matters

Sometimes the best way to appreciate a rare plant is to admire it from afar and support conservation efforts. Rosa myriadenia serves as a reminder that our native flora includes many species hanging on by a thread, deserving our respect and protection rather than our gardening ambitions.

If you’re passionate about rare native plants, consider supporting botanical gardens, native plant societies, or conservation organizations working to protect Oregon’s unique flora. That’s how we ensure future generations might have the chance to encounter the glandular rose in its natural habitat.

Remember: in the plant world, rarity isn’t always an invitation to collect – sometimes it’s a call to conserve.

Glandular Rose

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

Rosales

Family

Rosaceae Juss. - Rose family

Genus

Rosa L. - rose

Species

Rosa myriadenia Greene, nom. inq. - glandular rose

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