(syn. Acer cissifolium subsp. henryi) Aceraceae
Henry's Maple A-ser hen-REE-i
- Broadleaf deciduous tree or large shrub, to 30 ft tall and wide (~10 m × 10 m), shoots slightly
tomentose and brownish green and then darker when mature; new growth reddish. Leaves opposite,
compound (trifoliate) 3 elliptic leaflets, each 5-10 cm long, margin serrate or entire, bluish green to
olive green above; petiole about 10 cm long. Juvenile leaves coarsely serrate, similar to those
of A. cissifolium (van Gelderen and van Gelderen, 1999). "Fall color varies from a good
red or adequate pastel mix including red, to simply dreadful" (Jacobson, 1996, p. 16). Flowers in
slender whitish spikes; dioecious - male and female plants. Fruit (samaras) in long drooping
clusters, each fruit 2 cm long, wings upright or slightly spreading, nutlets thick and often sterile.
- Sun or shade.
- Hardy to USDA Zone (5) 6 Dirr (1998, p. 17) states that A. henryi
survived a winter temperature of -24o F without injury, whereas A. cissifolium was killed
to the main trunk. However, van Gelderen and van Gelderen (1999) list Zone 6 as the lowest
hardiness zone for A. henryi but Zone 5 for A. cissifolium. Native to central
China, mostly in Hubei and Sichuan Provinces.
- Not often in cultivation, some (most?) plants labeled as A. henryi are actually A.
cissifolium (van Gelderen and van Gelderen, 1999). According to Jacobson (1996) A.
henryi differs from A. cissifolium in that its leaflets are comparatively little toothed or
entire, at least on older specimens. Le Hardy de Beaulieu (2003) states that A. henryi
is distinguished from A. cissifolium by its red young shoots. But van Gelderen and
van Geldern (p. 173) state that "Acer henryi...lacks the conspicuous yellowish orange color in the
young growth, which is so attractive in A. cissifolium.
- henryi: after Augustine Henry (1857-1930), who discovered it. For a time he served as a doctor in China during which he collected botanical specimens which he send back home to Ireland. Later he changed careers, studying forestry in France, and was joint author, with Henry Elwes, of the famous seven-volume “The Trees of Great Britain and Ireland” (1907-1913).
- Oregon State Univ. campus: west side of Weniger Hall, near curb.