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North America Native Plant

Greene’s Maple

Greene’s Maple: A Rare California Native Worth Knowing About Meet Greene’s maple (Acer glabrum var. greenei), a fascinating and rare California native that deserves a spot on every native plant enthusiast’s radar. While you might not find this little-known maple variety at your typical garden center, it represents an important ...

Rare plant alert!

This plant is listed as rare and may be protected in certain regions. Its populations are limited, and removal from the wild could further endanger its survival. If you wish to enjoy this plant, consider sourcing from reputable nurseries that propagate responsibly or explore alternatives to help preserve natural populations.

Region: Conservation status by state

Status: S5T1T2: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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) ⚘ Subspecies or variety is imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Greene’s Maple: A Rare California Native Worth Knowing About

Meet Greene’s maple (Acer glabrum var. greenei), a fascinating and rare California native that deserves a spot on every native plant enthusiast’s radar. While you might not find this little-known maple variety at your typical garden center, it represents an important piece of California’s natural heritage that’s worth understanding and potentially incorporating into your landscape—with some important caveats.

What Makes Greene’s Maple Special?

Greene’s maple is a perennial shrub that typically grows as a multi-stemmed woody plant, usually staying under 13 to 16 feet in height. Unlike its towering tree cousins, this maple maintains a more manageable shrub form, making it potentially suitable for smaller landscapes where you want the charm of a maple without the massive size.

As a native California species, this maple has evolved specifically to thrive in local conditions, which means it’s naturally adapted to work with your region’s climate patterns, soil types, and local wildlife.

Where Does Greene’s Maple Call Home?

This maple variety is found exclusively in California, making it a true Golden State endemic. Its limited distribution contributes to its special status among California’s native flora.

A Word of Caution: Rarity Matters

Here’s where things get important: Greene’s maple has a Global Conservation Status of S5T1T2, which indicates this is a rare plant that deserves our respect and protection. If you’re considering adding this maple to your garden, it’s crucial to source it responsibly from reputable native plant nurseries that propagate their stock rather than wild-collect it.

Never collect plants from the wild, and always ask your nursery about their sourcing practices. Supporting ethical propagation helps ensure these rare beauties continue to thrive in their natural habitats while allowing gardeners to enjoy them at home.

Should You Grow Greene’s Maple?

If you can find responsibly sourced plants, Greene’s maple could be a wonderful addition to a California native garden. Here’s what makes it appealing:

  • It’s a true California native, supporting local ecosystems
  • Manageable size as a shrub rather than large tree
  • Part of the beloved maple family, potentially offering seasonal interest
  • Adapted to local growing conditions

The Growing Challenge

Here’s the honest truth: specific growing information for Greene’s maple is quite limited in available resources. This rarity in cultivation information reflects its status as an uncommon plant. If you’re lucky enough to find a specimen, you’ll likely need to:

  • Work closely with knowledgeable native plant specialists
  • Observe the plant’s needs carefully as it establishes
  • Provide conditions similar to other California native maples
  • Be patient as you learn its preferences

Alternative Options

If Greene’s maple proves elusive (which it very well might), consider these more readily available California native alternatives that can provide similar benefits:

  • Big-leaf maple (Acer macrophyllum) – if you have space for a larger tree
  • Native California buckeyes or other native deciduous shrubs
  • Other rare California natives from reputable sources

The Bottom Line

Greene’s maple represents the kind of unique, place-specific plant that makes California’s flora so special. While it may not be the easiest plant to find or grow, it offers the reward of participating in conservation through cultivation. If you’re an experienced native plant gardener looking for something truly special and uncommon, and you can source it responsibly, Greene’s maple could be a fascinating addition to your collection.

Just remember: with rare plants comes responsibility. By choosing to grow Greene’s maple, you become a steward of California’s botanical heritage. That’s a pretty special role for any gardener to play.

Greene’s Maple

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

Sapindales

Family

Aceraceae Juss. - Maple family

Genus

Acer L. - maple

Species

Acer glabrum Torr. - Rocky Mountain maple

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