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17. Pieris D. Don, Edinburgh New Philos. J. 17: 159. 1834.

马醉木属 ma zui mu shu

Fang Ruizheng (方瑞征 Fang Rhui-cheng); Peter F. Stevens

Pieris formosa

Credit: Harvard University Herbaria

Shrubs or trees, evergreen [or woody vines in E North America]. Leaves spirally arranged or pseudoverticillate [or in whorls of 3 in NE Asia], petiolate; leaf blade leathery, margin entire to strongly toothed. Inflorescences terminal or axillary, paniculate or racemose. Pedicels ± pubescent and with glandular hairs. Flowers 5-merous. Calyx valvate, abaxially glandular, adaxially pubescent. Corolla white, urceolate to tubular-urceolate, shortly 5-lobed. Stamens included; filaments swollen at base, straight or geniculate; anthers on back with a pair of spurs at anther-filament junction, dehiscing by introrse-terminal and elliptic pores. Ovary superior, with many ovules per locule. Stigma truncate. Capsule loculicidal, with 5 unthickened sutures. Seeds small.

Seven species: E Asia, Caribbean Region, E North America; three species (one endemic) in China.

1 Capsule densely to moderately pubescent, placentae central to nearly basal; style sunken into apex of ovary.   3 Pieris swinhoei
+ Capsule glabrous, placentae ± subapical; style only slightly sunken into apex of ovary.   (2)
2 (1) Margin of leaf blade conspicuously toothed from base to apex; secondary and fine veins clearly visible, impressed adaxially.   1 Pieris formosa
+ Margin of leaf blade with a few apical teeth only to distinctly toothed except near base; secondary and fine veins ± inconspicuous, not impressed adaxially.   2 Pieris japonica

Lower Taxa


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