Tree to 40 m, 1 m dbh. Branchlets greyish brown with clear or pale yellow appressed or erect hairs. Leaves evergreen, thin and leathery, 8–23(–34) × 3.4–9(–12) cm, ovate to oblong or lanceolate, upper surface glabrous, lower surface pubescent, 11–22 secondary veins on each side of the midrib, margins entire, apex acute to long-acuminate; petiole 2–3.5 cm long and pubescent; stipules adnate to the petiole for over half of its length, densely pubescent. Flowers on axillary shoots, ivory to yellow or orange and very fragrant, subtended by three to four bracts, brachyblast slender, 0.7–1.2 cm long and tomentose; tepals 12–15(–21), the outer four to six tepals narrowly obovate or linear to spathulate and 2–4 × 0.7–0.9 cm, the inner tepals gradually smaller; stamens yellow-orange; gynoecium stipitate with ~30 carpels, tomentose. Fruits 2–15 cm long; ripe carpels ovoid to ellipsoid and densely lenticellate, 1–2 cm long and without a beak. Flowering May to July, fruiting September to October (China). Diploid 2n=38. (Chen & Nooteboom 1993; Liu et al. 2004; Xia, Liu & Nooteboom 2008).
Distribution Bangladesh Myanmar Cambodia China S Xizang, S & SW Yunnan India Indonesia Laos Malaysia Nepal Thailand Vietnam
Habitat Forest, 200–1600 m.
USDA Hardiness Zone 10-11
RHS Hardiness Rating H2
Conservation status Least concern (LC)
Champak is a canopy tree of tropical and subtropical forests across a swathe of south and east Asia. It is prized in Asia for its highly fragrant, yellow to orange flowers, from which an essential oil used in perfume is extracted. We briefly mention this tender tree only because (along with its white flowered hybrid M. × alba) it is grown at the margin of our North American area as a street and yard tree in the San Francisco Bay Area of California, where it has followed immigrants from Asia on account of its cultural significance (Ritter 2012). However, it must be emphasized that this is a cold-sensitive tree: even on America’s Pacific seaboard –2 °C is sufficient to damage the plants (Hogan 2008). While the temptation is strong to plant out this relatively easily available species in colder areas, success seems most improbable.