特徵描述
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.
屬
About 220 genera, worldwide; 25 genera in Taiwan.
參考文獻
Limnophila 石龍尾屬
作者
LIU, Ho-Yih
型態特徵
Annual or perennial aquatic herbs, erect, prostrate, ascending or floating. Leaves opposite or verticillate, often gland-dotted and aromatic, serrate or laciniate, sometimes dimorphic, with aquatic leaves dissected into filiform segments. Flowers solitary or in racemes or spikes, axillary; calyx tubular-campanulate, 5-parted, subequal or posterior lobes larger, 2-bracetolate or ebracteolate; corolla blue, purple, red or white, funnelform or tubular, pubescent on upper inside, bilabiate, upper lip outermost in bud, entire or 2-lobed; stamens 4, included, didynamous, anthers distinct, 2-loculed, locules separate; style deflexed at apex, stigma bilamellate. Capsule enclosed by calyx, septicidally dehiscent, valves 4. Testa of seeds reticulate.
