作者

YANG, Yuen-Po and HSU, Kuo-Shih

型態特徵

Annual monoecious herbs with slender prostrate stems. Leaves opposite, linear, oblanceolate to obovate, 1-nerved and/or triplinerved, estipulate. Flowers unisexual, axillary, solitary or sometimes male and female in same axil; male flowers usually enclosed by 2 membranaceous bracteoles, anthers 2-celled, longitudinally dehiscent, filaments slender; female flowers sessile or short pedicellate, ovary 4-lobed, 4-locular. Fruit 4-lobed, lobes margined or slightly winged; seeds with a membranaceous testa; endosperm fleshy; embryo terete, straight.

屬

Only one genus and about 40 species, worldwide.

參考文獻

作者

CHEN, Shih-Huei and WU, Ming-Jou

型態特徵

Perennial or annual herbs. Leaves radical, petiole often widened, blade simple, entire or incised. Inflorescences scapose, usually peduncled spikes or heads. Flowers usually bisexual, regular, 4-merous. Calyx 4-parted, sometimes the abaxial 2 segments more or less connate. Corolla gamopetalous, scarious and veinless, 3- or 4-lobed, lobes imbricate in bud. Stamens 4, rarely 1 or 2, inserted on corolla tube and alternate with lobes, anthers 2-locular, splitting longitudinally. Ovary superior, 1- to 4-celled; style simple; ovules 1 or more in each cell, basal or attached, with a straight embryo and fleshy endosperm. Fruit usually a circumscissile capsule; seeds peltately attached, embryo straight, endosperm fleshy.

參考文獻

作者

LIU, Ho-Yih

型態特徵

Herbs or shrubs, rarely trees or vines; some species hemiparasitic or parasitic. Leaves opposite or alternate, rarely whorled; exstipulate. Flowers in racemes, spikes, or thyrsoid panicles or solitary; perfect, usually irregular. Calyx lobes 5 or 4, rarely 1 or 2 by fusion. Corolla sympetalous, 4 or 5-lobed, often 2-lipped. Stamens epipetalous, usually 4 and didynamous, or 4 fertile and 1 sterile, rarely 2 or 5; anthers 1 or 2-celled, cells distinct or more or less confluent. Disc annular or cup-shaped. Ovary superior, 2-celled; style simple or sometimes forked; stigma capitate, dilated, or 2-lobed. Fruit a capsule, rarely baccate. Seeds small, hilum lateral or ventral.

參考文獻