# California Barrel Cactus (*ferocactus cylindraceus*)

The California Barrel Cactus (Ferocactus cylindraceus) is a striking and resilient sentinel of the desert southwest, easily recognized by its stout, cylindrical body armed with formidable, curved spines. Growing slowly over centuries, these long-lived succulents act as critical lifelines in their harsh, arid environments, storing vast amounts of water to survive years of intense drought. In spring, they are crowned with a vibrant ring of yellow to orange flowers, which later mature into bright yellow, fleshy fruits that provide essential nourishment to desert wildlife.

- **Category:** [Plants](https://www.snappit.app/explore/categories/plant)
- **Rarity:** Common
- **Danger:** 1/5 · Very low
- **Snaps:** 1
- **Habitat:** Found in rocky slopes, gravelly washes, and alluvial fans of the Mojave and Sonoran Deserts, often under intense, direct sunlight.

![California Barrel Cactus](https://inaturalist-open-data.s3.amazonaws.com/photos/252989897/medium.jpeg)

Photo: CC0 · [iNaturalist](https://www.inaturalist.org/photos/252989897)

## Appearance

This cactus is globe-shaped when young, gradually elongating into a stout column that can stand up to 3 meters tall. Its defining feature is a dense network of heavy, rib-hugging spines that are heavily ringed and range in color from bright red or pink to pale yellow and grey. The ribs are deeply pronounced, numbering between 18 and 30, and the plant often leans noticeably toward the south, earning it the nickname 'compass cactus'.

## Taxonomy

- **Kingdom:** Plantae
- **Phylum:** Tracheophyta
- **Class:** Magnoliopsida
- **Order:** Caryophyllales
- **Family:** Cactaceae
- **Genus:** Ferocactus

## Interesting facts

- Its formidable, hook-like spines were traditionally used by Native American tribes as natural fishhooks and sewing needles.
- The California Barrel Cactus is often called the 'compass cactus' because mature specimens reliably lean toward the south or southwest to protect their growing tips from sunburn.
- While survival lore says you can drink water from a barrel cactus, the fluid inside is actually an extremely bitter, alkaline gel that can cause severe stomach upset.

## Special abilities

- **Accordion-style Expansion:** The deeply ribbed stem allows the cactus to expand rapidly when absorbing water during rare rain events and contract without damage during dry spells.
- **South-leaning Growth:** It grows lopsidedly, leaning toward the south to prevent the intense midday sun from scorching its vulnerable apical meristem.
- **Spiny Shade Screen:** The dense, overlapping grid of colorful spines acts as a natural sunshade, reducing surface temperature and shielding the plant from harsh desert winds.

## Measurements & details

- **Length:** 90-300 cm
- **Weight:** 20-200 kg
- **Lifespan:** 50-100 years

## Diet & Feeding

As an autotroph, it utilizes CAM photosynthesis to convert sunlight, carbon dioxide, and water into chemical energy while minimizing water loss during hot days.

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

## Ecological connections

- **Eaten by:** Desert Bighorn Sheep (*Ovis canadensis nelsoni*) — Bighorn sheep occasionally kick open the cactus to eat the moisture-rich pulp when water is scarce.
- **Mutualism:** Cactus Bee (*Diadasia rinconis*) — These specialized native bees pollinate the vibrant yellow flowers while gathering nectar and pollen.
- **Eaten by:** [Desert Tortoise](https://www.snappit.app/explore/desert-tortoise) (*Gopherus agassizii*) — Desert tortoises consume the fallen yellow fruits and occasional seedlings as a source of hydration and nutrition.

## Safety

**Danger:** 1/5 · Very low

No special safety notes yet.

## Frequently Asked Questions

### How to identify California Barrel Cactus?

Compare leaf arrangement, rosette shape, ribs, spines and flowers. Keep in mind that drought and strong sun can shift a plant's color and shape. Succulent Identifier: upload a photo and compare the visible details.

### How long is California Barrel Cactus?

90-300 cm

### How much does California Barrel Cactus weigh?

20-200 kg

### How long does California Barrel Cactus live?

50-100 years

### What does California Barrel Cactus eat?

As an autotroph, it utilizes CAM photosynthesis to convert sunlight, carbon dioxide, and water into chemical energy while minimizing water loss during hot days.

### Where is California Barrel Cactus usually found?

Found in rocky slopes, gravelly washes, and alluvial fans of the Mojave and Sonoran Deserts, often under intense, direct sunlight.

## Where to spot

- [Childs-Irving Hydroelectric Facilities](https://www.snappit.app/guides/places/childs-irving-hydroelectric-facilities) — Arizona, US · Historic District
- [Kelso Depot](https://www.snappit.app/guides/places/kelso-depot) — California, US · Historic Site

## 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: [California Barrel Cactus: Facts & Places to See — Snappit](https://www.snappit.app/explore/california-barrel-cactus)