Plant

Carob

Ceratonia siliqua

Also known as: Ceratonia siliqua, St. John's bread, locust bean

A large evergreen tree in the legume family (Fabaceae), native to the Mediterranean basin — one of the most heritage-laden Mediterranean trees. The dried bean pods are ground into carob powder, a chocolate-like brown powder that's been the foundational Mediterranean confection for thousands of years and that became widely known in late-20th-century Western health-food circles as a caffeine-free chocolate substitute. The carob seed is also the foundation of the *karat* unit of mass for gemstones — historically standardized as the weight of a single carob seed.

Photo via Wikimedia Commons — see source for license.

Scientific

Ceratonia siliqua (family Fabaceae) is one of only a handful of Ceratonia species and the only one with significant cultivation. The plant is dioecious (separate male and female trees), evergreen, drought-tolerant, and long-lived — mature carob trees can be 200+ years old and continue producing.

The dried pods (5–25 cm long, dark brown when ripe) contain a sweet pulp and several hard seeds. Two principal commercial products:

Carob powder / flour — from the ground pulp; sweet, slightly tangy, chocolate-like in color and texture but with a distinctive non-chocolate flavor
Locust bean gum — extracted from the seed endosperm; one of the most-used thickeners in commercial food production (it’s in much commercial ice cream, salad dressing, processed cheese — the species’ largest economic output)

Cultural and historical

Mediterranean cultivation is documented for at least 4,000 years. The tree is referenced in biblical, Talmudic, Greek, Roman, and Quranic sources. The “St. John’s bread” common name traces to the biblical story of John the Baptist eating “locusts and wild honey” in the wilderness — one interpretation reads “locusts” as carob pods (the species’ Greek and Hebrew names sometimes overlap with the word for grasshoppers).

The “carat” unit of mass for precious stones and gold purity:

The English word carat traces from the Arabic qīrāṭ, ultimately from Greek kerátion — the carob seed
Historical jewelry weight: 1 carat = 1 carob seed weight
The carob seed’s remarkably consistent mass — varying only ~5% across thousands of beans — made it the natural standard for small-weight measurement before metric standardization
Modern: 1 metric carat = 200 mg (slightly larger than the original Mediterranean carat); 24-carat gold = 99.9% pure gold

Modern uses

Carob powder became broadly known in 1970s–1980s Western health-food culture as a chocolate substitute — caffeine-free, lower in fat, with a similar visual profile to cocoa. The flavor is genuinely different (less rich and bitter than chocolate, slightly sweeter and tangier) — most Westerners who try carob expecting a chocolate substitute find it disappointing.

Beyond the powder, the locust bean gum extracted from the seeds is a much larger economic product — used as a thickener and stabilizer in essentially every commercial ice cream, many salad dressings, processed cheese, and countless other commercial food products under the labels E410, locust bean gum, or carob bean gum.

Global production

Top producers: Spain, Italy, Morocco, Portugal, Turkey, Cyprus.

Sources

Wikipedia — Carob

A plant entry in the 0mn1.one [[directory]].

What links here, and how

Inbound connections from across the wiki, grouped by lens and by relationship. These appear automatically — every entity page declares what it links to, and that data populates here on the targets.

Cultural

counterpart to

Cacao Carob is defined entirely in relation to cacao — the Western 'chocolate substitute' framing is carob's biggest modern cultural identity. The pair are an unusual case where the substitute has its own millennia-deeper heritage than the thing it substitutes for.

shares approach with

Pomegranate Mediterranean ancient-orchard kin — both drought-tolerant, both biblical-text mentioned, both with century-plus productive lives on the same farms.

General