ORCHIDACEAE ESTRUCTURAS ASPARAGALES

PRIMITIVE CHARACYERS

1. Plants are perennial by means of pseudobulbs or root-tubers.
2. Leaves simple.
3. Presence of large, coloured and scented flowers.
4. Flowers solitary, terminal and bisexual.
5. Parietal placentation.
6. Entomophilous pollination.
7. Ovules numerous.IM

ADVANCE CHARACTERS

1-Más de 200,000 especies
2. Plants only herbs that are widely distributed and successfully invaded in various situations. Cosmopolitan all over the globe.
3. Leaves exstipulate.
4. Adventitious roots-variously modified.
5. Flowers of diverse shape, size and colour, small and incospicuous.
6. Flowers zygomorphic due to labellum, which is variously modified.
7. Epigynous flowers.
8. Reduction in number of stamens to two or one.
9. Adhesion of stamens with style and stigma to form-column.
10. Gynoecium 3, syncarpous and inferior.
11. Reduction in the number of fertile lobes of stigma to 2.
12. Modification of third sterile lobe of stigma into a structure called restellum.
13. Pollen-grains are agglutinate into pollinia.
14. Fruit is a simple capsule.
15. Seeds non-endospermic, minute-and light in weight.

Estructuras básicas

Crecimiento

FLOR

 FLOR 2

 FLOR 3

- Habenaria parviflora. Flower features: A-B: flower. A: front view. B: lateral view. C-D: column. C: frontal view. D: lateral view. E-F: pollinaria. E: frontal view. F: lateral view. au: auricle. mrl: median rostellar lobe. ps: pollen sac. sp: spur. stg: stigmatic surface. vis: viscidium.