# Gum Bumelia (*sideroxylon lanuginosum*)

Gum Bumelia, scientifically known as Sideroxylon lanuginosum, is a resilient, thorny shrub or small tree native to the southern United States and northern Mexico. Often referred to as chittamwood or woollybucket buckthorn, this species is highly regarded for its toughness and ability to thrive in harsh, dry environments. It typically grows in rocky or sandy soils, establishing a deep root system that helps it withstand prolonged periods of drought. Historically, various Native American tribes utilized its sticky latex sap as an early form of chewing gum, and its dense, heavy wood was favored for creating durable tool handles.

In late summer, the tree produces clusters of tiny, bell-shaped, cream-colored flowers that emit a sweet fragrance, attracting a wide variety of native pollinators. These flowers eventually give way to small, glossy, blue-black berries that serve as a critical food source for migrating birds and local mammals during the autumn months. Its rugged appearance and ecological utility make it a fascinating specimen of arid and semi-arid woodland ecosystems.

- **Category:** [Plants](https://www.snappit.app/explore/categories/plant)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Snaps:** 1
- **Habitat:** Found in dry, sandy or rocky soils of open woodlands, glades, prairies, and riparian edges.

![Gum Bumelia](https://inaturalist-open-data.s3.amazonaws.com/photos/300026016/medium.jpeg)

Photo: Michelle W. （鍾偉瑋）, CC BY 4.0 · [iNaturalist](https://www.inaturalist.org/photos/300026016)

## Appearance

Gum Bumelia typically presents as a multi-trunked shrub or small tree reaching heights between 3 and 15 meters, characterized by a rounded, spreading crown and irregular, thorny branches. Its leaves are simple, alternate, and often clustered on short spur branches; they are oblong to obovate, measuring 3 to 8 centimeters long. The upper surface of the leaves is a lustrous dark green, while the undersides are coated in a distinctive dense, woolly layer of rusty-brown or silvery hairs. In late summer, clusters of small, fragrant white-to-greenish flowers bloom in leaf axils, followed in autumn by dark blue-black, egg-shaped drupes about 1 centimeter in length.

## Taxonomy

- **Kingdom:** Plantae
- **Phylum:** Tracheophyta
- **Class:** Magnoliopsida
- **Order:** Ericales
- **Family:** Sapotaceae
- **Genus:** Sideroxylon

## Interesting facts

- Despite its relatively small size, the wood of this tree is remarkably heavy, hard, and close-grained, which made it popular for crafting durable tool handles.
- Its species name 'lanuginosum' is Latin for 'woolly,' directly referencing the soft, felt-like hairs covering the undersides of its leaves.
- The common name 'Gum Bumelia' comes from the sticky, elastic latex sap that flows from wounded bark, which children and indigenous peoples historically chewed like gum.

## Special abilities

- **Woolly Thermal Barrier:** The dense layer of woolly hairs (trichomes) on the undersides of its leaves reduces water loss from transpiration and reflects intense sunlight.
- **Thorn Protection:** Modified branch tips form sharp thorns that deter large herbivorous mammals from browsing on its foliage.
- **Self-Healing Latex:** Produces a thick, milky latex sap when bark or leaves are damaged, sealing wounds against pests and fungal pathogens.

## Measurements & details

- **Length:** 300-1500 cm
- **Lifespan:** 50-150 years

## Diet & Feeding

As an autotrophic plant, it produces its own energy via photosynthesis using sunlight, water, and carbon dioxide while extracting vital minerals from the soil.

- **Primary Foods:** Sunlight, Water, Carbon dioxide, Soil minerals

## Ecological connections

- **Host plant:** Henry's Elfin (*Callophrys henrici*) — Caterpillars of this butterfly species feed on the foliage of Gum Bumelia as their primary larval host plant.
- **Eaten by:** [Cedar Waxwing](https://www.snappit.app/explore/cedar-waxwing) (*Bombycilla cedrorum*) — Feeds heavily on the ripe, dark blue-black berries during its autumn migration.
- **Eaten by:** [White-tailed Deer](https://www.snappit.app/explore/white-tailed-deer) (*Odocoileus virginianus*) — Browses on the leaves and tender young twigs, especially in areas with limited forage.

## Safety

**Danger:** 1/5 · Very low

No special safety notes yet.

## Frequently Asked Questions

### How to identify Gum Bumelia?

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 long is Gum Bumelia?

300-1500 cm

### How long does Gum Bumelia live?

50-150 years

### What does Gum Bumelia eat?

As an autotrophic plant, it produces its own energy via photosynthesis using sunlight, water, and carbon dioxide while extracting vital minerals from the soil.

### Where is Gum Bumelia usually found?

Found in dry, sandy or rocky soils of open woodlands, glades, prairies, and riparian edges.

## Where to spot

- [Thurber](https://www.snappit.app/guides/places/thurber) — Texas, US · Neighborhood

## 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: [Gum Bumelia: Facts & Places to See — Snappit](https://www.snappit.app/explore/gum-bumelia)