珙桐属 gong tong shu

Trees deciduous, polygamous. Leaf blade ovate, membranous, base cordate, margin serrate. Heads terminal, globose, pedunculate; bracts 2(or 3), white, 7-16 × 3-5 cm, larger one pendulous. Staminate flowers without perianth; stamens 1-7, inserted on receptacle; filaments slender, glabrous; anthers introrse, purple. Pistillate or bisexual flower 1, inserted at top of head; perianth segments small, unequal in size; ovary inferior, connected to receptacle, 6-10-loculed, ovule 1 per locule; style short, stout, 6-10-lobed; stigmas inflated. Drupe purple-green or pale brown, with yellowish dots, oblong-ovoid to ellipsoidal; mesocarp fleshy; endocarp bony, sulcate. Seeds 3-5; embryo erect, radicle terete, cotyledons oblong.

● One species: China.

Lower Taxa

• Davidia involucrata Baillon
• Davidia involucrata var. involucrata
• Davidia involucrata var. vilmoriniana (Dode) Wangerin