The project is only one branch. Because stem vascular bundles scattered, no vascular bundles cambium, adventitious roots of composition, characteristics and no aromatic oils are placed ancient herbal group, is one of the most primitive angiosperms.
1. Nymphaeaceae (nymphaeaceae, water lily family)
Bachelor of aquatic plants, 70 kinds of about 8 genera, widely distributed around the world. Genus of about 5, more than 10 species, produced north and south. engler generalized system of water lily, including 8 is more than 100 kinds. hutchinson and judd system of lotus and water lilies are divided into two families, cronquist system is divided into lotus (nelumbonaceae), water lily, water shield (cabombaceae) 3 families, and takhtajan (1997) is divided into three, four families (increase brandy bottle Caoke, nupharaceae), water lily and lotus placed in two subclasses.
Section aquatic herbaceous characteristics. There rhizomes. Leaves alternate or opposite, heart-shaped leaves, halberd-shaped or shield, submerged leaves (if present) forked fine crack. Flowers solitary; calyx often 4 to 12, sometimes petal-like; petals missing or 8 to most often transition into stamens; stamens 3 to the majority; carpel pistil 3 to the majority, separation or co-generation multi-room ovary, ovule 1 ~ Most, lamellar placenta. Berry-like fruit or nut-like, spongy. Chromosome: x = 12 ~ 29.
Nymphaea genus (nymphaea) petioles, veins and fruit without thorns; ovary semi-inferior, multicolored flowers, day opening night together, so that the water lily. A total of 37 species of five species, most commonly cultivated species are aquatic flowers, such as red water lily (n. rubra roxb.), White water lily (n. alba l.), Yellow water lily (n. mexicana zucc.) And so on. Water Lilies (n. tetragona georgi) spend less wild.
Undergraduate common are: the gravy is (euryale) only one kind, gravy (. E. ferox salisb ex koenig et sims), petiole, dorsal vein and calyx are spiny; ovary inferior; widely distributed in China. Seeds for medicinal called "beheaded meters", or Gorgon. Brandy bottle case (nuphar) the brandy bottle (. N. pumilum (timm.) dc) leaves II: submerged leaves membranous, wrinkled; floating leaves papery or leathery, smooth. To the east of the northern distribution, cultivation for viewing. Wang Lin (victoria amazonica sowerby.) Leaf floating, large, up to 2 m in diameter; flowers like lotus. South American origin, often in greenhouses introduction to the world famous ornamental plants. Brasenia (. Brasenia schreberi jfgmel) producing south, Hangzhou staple edible leaves; Cabomba (cabomba caroliniana gray) to sink the plants, native to North America, as the aquarium common ornamental plants, Yi was born in our country in recent years. |
Barclayaceae