Genus Drimys in Family Winteraceae

Genus Description

Drimys (J.R.Forst. & G.Forst.) belongs to Winteraceae in order Canellales, a small, ancient lineage of magnoliids with vessel-less wood. About five species are currently accepted (POWO, 2024). The genus is centered in the Andes and southern South America, with one widely distributed montane species reaching Venezuela’s tepuis; it occurs in humid montane, cloud and Nothofagus forests and alpine krummholz, mostly above 1,000 meters elevation. Drimys winteri is often treated as type for the generic name (Vink, 1970; Doust & Doust, 1988).

Morphologically Drimys consists of evergreen shrubs to small trees, the foliage strongly aromatic when crushed. Leaves are alternate, entire, leathery, and lack stipules; the abaxial surface is often glaucous and the midrib sunken above. Unisexual (functionally) or bisexual flowers appear in axillary, thyrsoid or racemose clusters; each flower has a calyx of sepals that may be fused into a tube, 5–20 or more white, narrow petals, numerous free stamens, and a multi-carpellate ovary with carpels arranged in a ring. Placentation is parietal, and the fruit is a berry-like aggregate of fleshy carpels containing several seeds per carpel.

Centers of diversity lie in the southern and Andean Andes; endemism is strong in Chile and Argentina (for D. winteri) and in Colombian–Venezuelan highlands (for D. granadensis). A separate montane species occurs on Venezuelan tepuis (D. roraimensis). D. andina is a high-Andean taxon in the central and southern Andes, while a puzzling “D. angustifolia” recorded from the Cape region of South Africa is treated as doubtful (Doust & Doust, 1988; POWO, 2024). Habitats range from fog-laden coastal forests to high-elevation grasslands and shrublands, with the genus largely confined to humid, cool climates (Vink, 1970; Jones, 1974; Rüegg et al., 2016).

Intrinsic biology is imperfectly known; early work indicated pollen with high pollen/ovule ratios consistent with generalized insect pollination (Jones, 1974), and fruits are likely dispersed by birds in open habitats, although quantitative data are scarce for most species. Chromosome counts reported for the family commonly include x = 43, with some Drimys counts recorded near this base, though not uniformly across the genus (Jones, 1974).

Taxonomically Drimys is now restricted to the South American clade; Tasmannia—formerly treated within a broadly circumscribed Drimys—is segregated as Australian–Papuasian (Vink, 1970; Doust & Doust, 1988; Rüegg et al., 2016). Within Drimys, subgenera are not consistently applied, and sectional schemes remain provisional (Jones, 1974; WFO, 2024). Some local treatments maintain D. andina as a variety of D. winteri, and the status of “D. angustifolia” remains unresolved (Doust & Doust, 1988; POWO, 2024).

Human relevance is modest: D. winteri supplies a scented timber (canelo) used locally for cabinetwork and fuel, and the species is cultivated in gardens for its glossy foliage and fragrant bark; it can naturalize in suitable climates. None of the other species hold major economic roles.

Conservation concerns focus on the Andean taxa: habitat loss from deforestation, grazing and altered fire regimes threaten populations, while montane endemics are vulnerable to climate-driven upward shifts. The outlook depends on integrating taxonomic clarity, field surveys and targeted ex situ conservation (APG IV, 2016; POWO, 2024).

• Drimys andina ((Reiche) R.A.Rodr. & Quezada)
• Drimys angustifolia (Miers)
• Drimys brasiliensis (Miers)
• Drimys confertifolia (Phil.)
• Drimys granadensis (L.f.)
• Drimys roraimensis ((A.C.Sm.) Ehrend. & Gottsb.)
• Drimys winteri (J.R.Forst. & G.Forst.)