Two-Horn Bundleflower: Arizona’s Lesser-Known Native Gem
If you’re looking for a truly unique Arizona native to add some local flair to your desert garden, meet the two-horn bundleflower (Desmanthus bicornutus). This perennial forb might not be the showiest plant in your landscape, but what it lacks in flashiness, it makes up for in authentic regional character.





What Exactly Is Two-Horn Bundleflower?
Two-horn bundleflower is a native perennial forb, which simply means it’s a non-woody plant that comes back year after year. Think of it as the herbaceous cousin in the plant world – it won’t develop a thick, woody trunk like a tree or shrub, but it will establish a persistent root system that keeps it going through the seasons.
This plant is native to the lower 48 states, though its distribution is quite specific – it’s found naturally in Arizona, making it a true regional specialty. If you’re gardening in the Grand Canyon State, you’re working with a plant that has called your area home long before any of us arrived on the scene.
Why Consider Two-Horn Bundleflower?
Here’s where things get interesting – and a bit challenging. Two-horn bundleflower is something of a botanical mystery. While we know it’s a legitimate Arizona native, detailed information about its specific characteristics and growing requirements is surprisingly scarce. This rarity in documentation might actually reflect its rarity in nature, or it could simply mean it’s been overlooked by researchers and gardeners alike.
The Honest Truth About Growing Information
Let’s be upfront: if you’re hoping for a detailed growing guide complete with specific soil pH requirements and precise watering schedules, you might be disappointed. The available information about Desmanthus bicornutus specifically is limited. However, we can make some educated guesses based on its forb nature and Arizona origins:
- As an Arizona native, it likely prefers well-draining soils
- Full sun exposure would be typical for desert natives
- Drought tolerance is probably a given
- It’s likely adapted to alkaline soils common in the Southwest
Should You Plant It?
This is where gardening gets philosophical. Two-horn bundleflower represents the ultimate in local authenticity – you literally cannot get more native than a plant that naturally occurs in your specific state. However, the lack of readily available information, seeds, or plants might make it more of a botanical treasure hunt than a straightforward gardening choice.
If you’re the type of gardener who loves a challenge and wants to support truly local biodiversity, seeking out this species could be a worthwhile adventure. Just be prepared for some detective work in finding sources and figuring out its specific needs through trial and observation.
Alternative Options
If two-horn bundleflower proves too elusive, consider other members of the Desmanthus family that are better documented and more widely available, such as Illinois bundleflower (Desmanthus illinoensis), which, despite its name, also grows in the Southwest and has similar ecological benefits with much more available growing information.
The Bottom Line
Two-horn bundleflower embodies both the excitement and frustration of native plant gardening. It’s authentically local, potentially beneficial for native pollinators and wildlife, and represents a direct connection to Arizona’s natural heritage. However, its obscurity means you’ll be pioneering rather than following established practices.
For adventurous gardeners committed to supporting local ecosystems and don’t mind some uncertainty, this could be exactly the kind of unique challenge that makes gardening rewarding. For those preferring well-documented, readily available plants with proven track records, you might want to start with better-known Arizona natives and perhaps circle back to this botanical puzzle later.