Jatropha conzattii

1. Origin Geographic Range: This species is a narrow endemic to Mexico, specifically localized in the state of Oaxaca. It is primarily found in the Tehuantepec Isthmus region.Coordinates: Its distribution is centered around $16^\circ 15' \text{ N}$ to $16^\circ 45' \text{ N}$ latitude and $95^\circ 00' \text{ W}$ to $95^\circ 45' \text{ W}$ longitude.Altitude: It thrives at relatively low elevations, typically between $50$ and $400$ meters above sea level.
2. Habitat & Climate Substrate: It is a specialist of seasonally dry tropical forests (Selva Baja Caducifolia). It typically grows in rocky, calcareous soils or on low limestone hills where drainage is instantaneous.Climate: The region experiences a prolonged and severe dry season lasting up to 7 months.Temperature: It is highly heat-tolerant. Daytime temperatures in Oaxaca's lowlands frequently range from $30^\circ \text{C}$ to $38^\circ \text{C}$. It is frost-sensitive and prefers a stable warm environment, with winter nights ideally staying above $15^\circ \text{C}$.
3. Morphological Characteristics The Trunk (Pachycaul): This is a succulent shrub or small tree reaching $2 - 4$ meters in height. Its most striking feature is the papery, peeling bark (exfoliating epidermis). The bark is typically a lustrous reddish-gold or copper color, which peels away in translucent sheets to reveal a green, photosynthetic underlayer.Foliage: Often with a cordate (heart-shaped) base. They are bright green and appear only during the short rainy season, allowing the sculptural trunk to take center stage for most of the year.Flowers: It produces small, inconspicuous greenish-yellow to cream-colored flowers in branched cymes.Aesthetic: Due to its peeling bark and thickened base, it is often cultivated as a "large-scale bonsai" or focal specimen in pachycaul collections.
4. Etymology & Story Etymology: The species is named in honor of Cassiano Conzatti ($1862–1951$), an Italian-born Mexican botanist who dedicated his life to documenting the vast flora of Oaxaca.The Story: For a long time, Jatropha conzattii was overshadowed by its more famous cousins like J. berlandieri. However, it was "rediscovered" by the succulent community for its incredible metallic bark, which mimics the appearance of ancient, weathered metal. In its native Oaxaca, it survives the scorching sun by shedding its "skin" (bark), a strategic adaptation to prevent overheating and moisture loss. Collectors prize it as a "Living Sculpture of Mexico," as no two specimens grow with the same gnarled trunk pattern.