Orchidaceae
/ˌɔr.kɪˈdeɪ.ə.siˌi/
Definition
Orchidaceae is the botanical family that includes orchids, a large group of flowering monocots. Members are distinguished by highly specialized flowers, usually with three sepals, three petals, and a modified petal called a lip, plus reproductive parts fused into a central column. Orchidaceae occurs worldwide in terrestrial and epiphytic forms, meaning some grow in soil while others grow attached to trees without taking nutrients from them.
Botanical Significance
- Flower structure: Many members of orchidaceae are identified by highly specialized flowers, including a lip-like petal called the labellum and fused reproductive parts in a single column. These traits help botanists recognize relationships within the family.
- Pollination strategies: This group is well known for close links with pollinators. Flower shape, scent, and color often guide specific insects or birds, which has made orchidaceae important in studies of plant reproduction and coevolution.
- Seed germination: Seeds are extremely small and contain very little stored food. As a result, many species depend on mycorrhizal fungi, beneficial root-associated fungi, to support germination and early growth.
- Horticultural relevance: In cultivation, growth habit varies widely, including epiphytic forms that grow on trees and terrestrial forms that grow in soil. That difference affects potting media, watering, and root aeration needs.
Related Terms
Velamen
Velamen is the spongy, multilayered outer covering on the aerial roots of many epiphytic orchids and some aroids. Made…
Potting mix
Potting mix is a container-growing substrate, or rooting medium, formulated for plants grown in pots rather than in the…
Orchid bark
Orchid bark is a coarse potting material made from pieces of tree bark, commonly fir or pine, used as a growing medium…
Pollination
Pollination is the transfer of pollen from the male part of a flower, the anther, to the female part, the stigma, of…