North America Native Plant

Curvepod Milkvetch

Botanical name: Astragalus curvicarpus var. brachycodon

USDA symbol: ASCUB

Life cycle: perennial

Habit: forb

Native status: Native to the lower 48 states  

Synonyms: Astragalus whitedii Piper var. brachycodon Barneby (ASWHB)   

Curvepod Milkvetch: A Native Oregon Perennial Worth Knowing If you’re passionate about native gardening in Oregon, you might want to get acquainted with curvepod milkvetch (Astragalus curvicarpus var. brachycodon). This perennial native has a name that sounds like it belongs in a fairy tale, but it’s very much a real ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3T4: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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. ⚘ Subspecies or varieties is apparently secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the region or more than 10,000 individuals ⚘ 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. ⚘

Curvepod Milkvetch: A Native Oregon Perennial Worth Knowing

If you’re passionate about native gardening in Oregon, you might want to get acquainted with curvepod milkvetch (Astragalus curvicarpus var. brachycodon). This perennial native has a name that sounds like it belongs in a fairy tale, but it’s very much a real part of Oregon’s natural heritage.

What Makes Curvepod Milkvetch Special?

Curvepod milkvetch is a native Oregon perennial that belongs to the legume family. You might also see it listed under its synonym, Astragalus whitedii Piper var. brachycodon Barneby, in some botanical references. Like many of its Astragalus cousins, this plant has likely evolved some pretty clever survival strategies for Oregon’s unique climate conditions.

Where You’ll Find It Growing Wild

This native beauty calls Oregon home, where it has adapted to local growing conditions over thousands of years. As a true Oregon native, it’s perfectly suited to the state’s climate patterns and soil conditions.

A Note About Rarity

Here’s something important to know: curvepod milkvetch has a conservation status that suggests it may be uncommon or limited in distribution. If you’re considering adding this plant to your garden, please make sure you source it responsibly from reputable native plant nurseries that propagate their own stock rather than wild-collecting. Never collect seeds or plants from wild populations.

Why Consider Curvepod Milkvetch for Your Garden?

As a native Oregon plant, curvepod milkvetch offers several benefits for local gardeners:

  • It’s perfectly adapted to Oregon’s climate and soil conditions
  • As a perennial, it will return year after year once established
  • Being a legume, it likely helps improve soil nitrogen levels
  • It supports local ecosystems by providing habitat for native wildlife
  • It preserves Oregon’s botanical heritage in your landscape

Growing Curvepod Milkvetch

Unfortunately, detailed growing information for this specific variety is quite limited in available sources. However, as an Oregon native, it’s likely adapted to the state’s typical growing conditions. If you’re interested in trying this plant, here are some general guidelines:

  • Start with plants from reputable native plant nurseries
  • Give it conditions similar to its natural Oregon habitat
  • Be patient – many native plants take time to establish
  • Avoid overwatering once established, as natives often prefer less water than non-natives

The Bottom Line

Curvepod milkvetch represents an opportunity to grow a true Oregon native that’s part of the state’s natural heritage. While we don’t have extensive cultivation information available, its status as a native perennial makes it worth considering for gardeners committed to supporting local ecosystems. Just remember to source it responsibly and be prepared for the adventure of growing a lesser-known native plant.

If you can’t find curvepod milkvetch available from local nurseries, consider exploring other native Astragalus species or Oregon native legumes that might be more readily available while still supporting your local ecosystem.

Curvepod Milkvetch

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

Astragalus L. - milkvetch

Species

Astragalus curvicarpus (A. Heller) J.F. Macbr. - curvepod milkvetch

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