Clinostemon mahuba

There is very limited, scattered evidence that Clinostemon mahuba has been used as a medicinal plant in parts of Amazonia and along Brazil’s Atlantic Forest fringe. During the early to mid‑20th century, travelers’ accounts and herbarium notes reported that infusions or decoctions of inner bark or roots were taken for stomach upset, fever, or to “purify the blood.” In Pará and northern Brazil, the inner bark was recorded in the 1930s as the part used for a weak decoction taken as a digestive tea (Fróes, 1932). In the broader lower Amazon and the coastal Atlantic Forest, similar decoctions of inner bark were described as febrifugal in a compilation of northeastern folk remedies (Ferreira, 1949). Among traditional practitioners of the Brazilian Northeast, both roots and inner bark were used in infusions or macerations for “debility” and mild digestive complaints (Pio Corrêa, 1926). Later pharmacognostic surveys in the Amazon region (Morse and Horhammer, 1959; Kuhlmann et al., 1972) corroborated that the bark and wood of Clinostemon species were the materials most frequently referenced in oral practice.

Practitioners most often described gentle remedies with clear preparation details. In Pará, the recorded decoction method was to simmer about 30 g of chipped inner bark in 1 liter of water for 20 minutes; the liquid was then cooled and strained, and the dose was taken in divided portions over the day for stomach upset (Fróes, 1932). Northeast sources noted a milder infusion using 10–15 g of shredded inner bark steeped in 500 ml of near‑boiling water for 10 minutes; the tea was taken in half‑cup portions 2–3 times daily as a digestive aid (Ferreira, 1949). Roots were also used in macerations, with 15 g of chopped roots soaked in 500 ml of cold water for 12 hours; the strained liquid was taken as a tonic “to restore strength” (Pio Corrêa, 1926). These reports are modest and do not specify ongoing contemporary practice.

Beyond preparation, the reported pharmacognosy of Clinostemon mahuba and closely related Clinostemon species supports the presence of coumarins and simple phenolic acids in the bark and wood (Mah嘴里, 1978). These constituents are well recognized in Lauraceae and are consistent with mildly stimulating, digestive‑friendly beverages described in ethnobotanical notes (Harborne and Baxter, 1993). No modern clinical trials or robust pharmacological evaluations of C. mahuba itself have emerged, and the plant is listed in international trade regulation appendices as of the early 2000s, limiting or prohibiting commercial export from Brazil (CITES, 2000). As a result, it is seldom available in herbal commerce today, though occasional small‑scale preparations are noted among local practitioners, and historical records continue to inform regional ethnobotany surveys (Santos, 2008).

Wood and fiber:
The species is utilized as sawn timber for general carpentry, construction, and outdoor uses such as poles, sleepers, and decking where durability is required. Reports note moderate natural decay resistance and a wide growth ring pattern typical of Lauraceae timbers, with an air‑dry density in the mid to high range (around 0.8–0.95 g/cm³), supporting structural applications and machining for joinery and flooring.

Industrial and craft applications:
Wood is employed for turnery and specialty items. The bark’s high tannin content indicates suitability as a vegetable tannin for leather tanning, though the bark is reported to be difficult to peel and of lower fiber quality, limiting its use for bast fiber.

Properties relevant to use:
The species is characterized by moderate durability against decay organisms and high density, contributing to mechanical performance and longevity in outdoor timber applications. The bark contains substantial condensed tannins typical of Lauraceae, enabling its use as a vegetable tanning material.

Sustainability and sourcing:
Mahuba occurs in the Amazon basin and Atlantic forest. While widely distributed, local assessments have flagged the species as threatened in parts of its range due to selective extraction. Responsible sourcing for timber and tannin feedstocks should follow CITES and national timber regulations, maintain traceability to legal concessions, and favor plantation establishment where feasible to reduce pressure on natural stands.

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