1. Distribution: They grow in almost all types of habitats (worldwide). They grow in Arctic, Antarctic area .as well as in Mediterranean area.
2. Habitat: angiosperms grow in almost every kind of habitats. Some grow at an altitude of 6,000 metres in the Himalayas. Some are found in frozen condition of Antarctica. They are found on plains, hilly areas, seas, lakes and in desert conditions. Opuntia is a xerophyte, Hydrilla, Vallisineria are submerged fresh water hydrophytes, Zostera marina found in shallow seas and some are found as mangrove vegetation in Estuary, eg. Rhizophora, Avicinia. In rain forests, some plants grow on the branches of other plants but do not obtain water or food from them, they are called epiphytes, eg. Irenda. Most of the plants are terrestrial and herbs, shrubs and trees, eg. Neem, Peepal, Mango, Wheat, and Pea etc.
3. Habit: plant of this category show diversity in their habits. Wolfia is smallest angiosperms (size: 2.00 mm), tallest angiosperm is Eucalyptus (300-400 feets). Most of the plants are grasses or herbs, shrubs, trees and climbers. Herb- Tribulus, Grass- Cyanadon, Shrub-Calotropis, Tree-Acacia (Babool), Climber- Bouganivillea etc.
4. Main plant body is sporophyte. They have well developed root system, stem system. Stem system is made up of leaves and stem.
5. Nutrition: mostly photosynthetic. Some show hetrotrophic mode of nutrition, e.g., Cuscuta and Orobranche are parasitic, Indian Pipe plant (Monotropa) saprophytic, Nehenthes and Venus fly trap (Dionaea) are insectivore in nature.
6. Anatomy: In angiosperm well developed vascular system exists. Xylem and Phloem both are made of four elements each. Xylem is made up of Tracheids, vessels, xylem parenchyma and xylem fibres. Phloem is made up of sieve tubes, companion cells, phloem parenchyma and phloem fibres. Cambium is present in dicotyledons for secondary growth.
7. Characters related with reproduction: angiosperms are flowering plants. Flower is a modified shoot with fertile leaves for sexual reproduction. Stamen is microsporophyll while pistil is macrosrporophy.
8. Male and female gametophytes are highly reduced.
9. Pollen grains are received by stigma of pistil during pollination to reach up to ovule.
10. Fertilization is siphonogamous type in which pollen tube is formed to transfer non motile male gametes up to egg cell.
11. Endosperm is triploid it forms after fertilization to provide nutrition to developing embryo.
12. In angiosperm double fertilization and triple fusion, present.
13. Seeds are protected inside fruit.
14. Seeds have one or two cotyledons.
