特徵描述
作者
YANG, YUEN-PO and LU, SHENG-YOU
型態特徵
Annual or perennial aquatic herbs with horizontal or vertical rhizomes. Leaves simple, alternate, long-petiolate, submersed and/or emergent, blades linear, sagittate, cordiform or orbicular. Flowers axillary, solitary on long peduncles, emergent, bisexual, actinomorphic, hypogynous to perigynous; sepals 4-6, green to petaloid; petals 0-numerous; stamens numerous, anthers elongate; ovary compoud, of 3-35 united or partially united carpels, multilocular; stigmas many, united into a disc with radiating rays; ovules numerous, usually anatropous, rarely orthotropous. Fruit a spongy berry, many-seeded; seeds ovoid to subovoid, operculate, mostly arillate; embryo small, with 2 thick, fleshy cotyledons; endosperm scanty.
屬
About six genera, cosmopolitan; three genera in Taiwan.
參考文獻
Euryale 芡屬
作者
YANG, YUEN-PO and LU, SHENG-YOU
型態特徵
Annual or perennial herbs, densely prickly on veins of leaves, calyx, petioles and peduncles. Leaves floating, peltate, orbicular, strongly corrugated, long petiolate. Flowers solitary, long pedunculate; calyx tube connate with the ovary, with 4 persistent lobes; petals 20-35, purple-violet, inserted on calyx tube, 3-5-whorled; stamens numerous, inserted on petals, free, many-whorled, filaments linear, anthers introrse, 2-locular, stigma discoid or campanulate; ovary inferior, subglobose, 6-8- or many-celled; ovules 6-8 or more in each cell, anatropous; seeds 8 to many, spherical, arillate.
