# Lambert's Locoweed (*Oxytropis lambertii*)

Lambert's Locoweed is a pretty plant with lovely purple flowers. It grows in the wild and is known for its unique look and special smell that attracts bees and butterflies.

- **Category:** [Plants](https://www.snappit.app/explore/categories/plant)
- **Rarity:** Common
- **Danger:** 3/5 · Moderate
- **Snaps:** 3
- **Habitat:** Mountain regions

![Lambert's Locoweed](https://commons.wikimedia.org/w/index.php?title=Special:Redirect/file/Oxytropis_lambertii.jpg&width=800)

Photo: Matt Lavin, CC BY-SA 2.0 · [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Oxytropis_lambertii.jpg)

## Appearance

The Lambert's Locoweed has showy spikes of pea-like flowers, typically vibrant purple, pink, or sometimes white. It forms dense clumps of silvery-green, hairy leaves that grow from a central base, standing out in arid landscapes.

## Taxonomy

- **Kingdom:** Plantae
- **Phylum:** Tracheophyta
- **Class:** Magnoliopsida
- **Order:** Fabales
- **Family:** Fabaceae
- **Genus:** Oxytropis

## Interesting facts

- Eating too much of this plant can make animals wander in circles, acting totally confused!
- It can grow in really tough, dry soils where most other plants would simply dry up and vanish.
- Its vibrant, pea-like flowers can glow in shades from deep purple to soft pink and even pure white!
- Tiny bacteria in its roots are like mini-chefs, cooking up nutrients for the plant from the air!

## Special abilities

- **Root Resilience:** Lambert's Locoweed has a deep taproot that helps it find water far underground, allowing it to survive in dry, harsh environments.
- **Toxin Shield:** Lambert's Locoweed can produce a powerful toxin called swainsonine, which helps it defend against grazing animals that try to eat its leaves.
- **Nutrient Harvester:** This plant can work with special bacteria in its roots to pull nitrogen from the air, making its own food in poor soils.

## Measurements & details

- **Height:** 10-50 cm
- **Spread:** 15-30 cm
- **Flower Size:** 1-2 cm
- **Bloom Season:** Late spring to mid-summer
- **Edible:** No
- **Toxicity:** High
- **Lifecycle:** Perennial
- **Pollination Method:** Insect

## Ecological connections

- **Eaten by:** [Cattle](https://www.snappit.app/explore/cattle) (*Bos taurus*) — Eating too much causes 'locoism'.
- **Eaten by:** [Horse](https://www.snappit.app/explore/horse) (*Equus caballus*) — Highly susceptible to its toxic effects.
- **Pollinates:** Western Bumblebee (*Bombus occidentalis*) — Visits its flowers for nectar and pollen.
- **Symbiotic with:** Rhizobia bacteria (*Rhizobium leguminosarum*) — Fixes nitrogen in its root nodules.

## Traits

- [Flowering](https://www.snappit.app/explore/traits/flowering): Flowering plants are any plants that produce flowers as part of their reproductive cycle.
- [Nitrogen Fixing](https://www.snappit.app/explore/traits/nitrogen-fixing): Describes organisms capable of converting atmospheric nitrogen into compounds usable by plants.
- [Fragrant Flower](https://www.snappit.app/explore/traits/fragrant-flower): Fragrant flowers emit a pleasant aroma, often to attract pollinators or for defense.
- [Colorful](https://www.snappit.app/explore/traits/colorful): Colorful describes organisms or objects displaying a wide range of bright and distinct colors.
- [Edible](https://www.snappit.app/explore/traits/edible): Edible plants are those parts of a plant that are considered safe for human consumption.
- [Pollinator Magnet](https://www.snappit.app/explore/traits/pollinator-magnet): Describes plants that are particularly attractive and beneficial to a wide range of pollinating organisms.
- [Mountain](https://www.snappit.app/explore/traits/mountain): This habitat trait identifies species found in mountainous regions, characterized by high elevation, steep slopes, and varying climate zones.

## Collections

- [Plants](https://www.snappit.app/explore/collections/plants)

## Safety

**Danger:** 3/5 · Moderate

Do not touch or eat any wild plants without asking an adult first.

## Frequently Asked Questions

### How to identify Lambert's Locoweed?

Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details.

### How tall is Lambert's Locoweed?

10-50 cm

### How wide does Lambert's Locoweed spread?

15-30 cm

### How big are the flowers on Lambert's Locoweed?

1-2 cm

### When does Lambert's Locoweed bloom?

Late spring to mid-summer

### Is Lambert's Locoweed edible?

No

### Is Lambert's Locoweed toxic?

High

### What is Lambert's Locoweed's lifecycle?

Perennial

## Where to spot

- [Leadville Historic District](https://www.snappit.app/guides/places/leadville-historic-district) — Colorado, US · Historic District
- [Cripple Creek Historic District](https://www.snappit.app/guides/places/cripple-creek-historic-district) — Colorado, US · Historic District
- [Denbigh Experimental Forest](https://www.snappit.app/guides/places/denbigh-experimental-forest) — North Dakota, US · Botanical Garden
- [Fall River Entrance Historic District](https://www.snappit.app/guides/places/fall-river-entrance-historic-district) — Colorado, US · Historic District
- [Georgetown-Silver Plume Historic District](https://www.snappit.app/guides/places/georgetown-silver-plume-historic-district) — Colorado, US · Historic District
- [Gold Hill](https://www.snappit.app/guides/places/gold-hill) — Colorado, US · Neighborhood

[View all places to see Lambert's Locoweed](https://www.snappit.app/guides/where-to-see/lamberts-locoweed)

## More Plants

- [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*)
- [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*)
- [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*)
- [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*)

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Source: [Lambert's Locoweed: Facts & Places to See — Snappit](https://www.snappit.app/explore/lamberts-locoweed)
