g Text Version
Beauty & Self
Books & Music
Food & Wine
Health & Fitness
Hobbies & Crafts
Home & Garden
News & Politics
Religion & Spirituality
Travel & Culture
TV & Movies

Bored? Games!
Take a Quiz
Rate My Photo

Autism Spectrum Disorders
Mental Health
Blogs / Social Networking
Kidney Disease
Today in History

All times in EST

Full Schedule
g Orchids Site

BellaOnline's Orchids Editor


Orchid Glossary (Terms related to structure)

At times we come across terms (related to orchids) which are difficult to understand. So I have put together a list of terms which are used when referring to the structure of orchids. This is not an exhaustive list, however I have tried to include more commonly used terms.

Abaxial: the side away from the axis (stem), generally refer to the lower surface
Acuminate: tapering to a slender point
Adaxial: the side facing the axis (stem), generally refer to the upper surface
Adnate: when an organ is joined with another (e.g. a petal attached to the column)
Adventitious: organs which develop at other than usual location, e.g. roots developing from leaves or stems.
Aerial: growing in an exposed condition in air/atmosphere
Anther: part of stamen that produces pollen
Apex: tip
Apical: at the apex of any structure, e.g. at the top of the stem or pseudobulb
Autotrophic: plants which are able produce their own food in the presence of sunlight
Axil: angle formed by a leaf/bract with the axis branch/stem from which it arises
Basal: situated at the base of an organ such as stem or pseudobulb
Bilobate: having two lobes
Blotch: irregularly coloured patch
Bracts: leaf-like organ bearing flower/inflorescence in its axil
Caducous: that which falls off early
Calceolate: slipper-shaped (e.g. flower of a Paphiopedilum)
Capsule: fruit or seed case of orchids
Cauline: growing on the stem
Cilia: minute hair like structures usually found around the margins of organs
Column: reproductive part of the flower, present in the centre and consists of fused male (style) and female (stigma) reproductive organs
Conduplicate: folded lengthwise such that both side are face to face
Connivent: converging but not fused
Corolla: white/coloured inner whorl of the flower, also called the petals
Cymbiform: having boat shaped concave surface
Dentate: with outward facing acute teeth along the margin
Dichotomous: dividing into two, e.g. stem dividing into two branches
Disc: upper surface of the middle portion of the lip
Dorsal: related to the back of a structure like lower surface of a leaf; abaxial
Floral bract: bract from whose axil the flower arises
Foliaceous: having leaf-like appearance
Fringed: hair like appendages present at the margin
Glandular: possessing glands
Gynostemium: column of an orchid flower; the androecium and gynaecium combined
Hyaline: that which is colourless/translucent
Hypochile: lower section of jointed labellum of some orchids
Imbricate: a regularly overlapping surface
Inferior: when describing the ovary which lies beneath the perianth
Inverted: turned upside down; reverse position
Involute: inwardly curved
Labellum: the third petal of orchid flowers, usually enlarged and highly modified
Lamella: a thin flat membrane, scale or septum
Lamina: a flattened part of an organ, like leaf blade, or the broad middle part of the labellum
Lateral: at the side; as in the two lateral sepals of orchid flower
Lip: a modified abaxial petal; the labellum
Membranaceous: thin, more or less translucent layer
Node: joint on the stem from where the leaves or flowers arise
Ovary: part of the flower which contains the ovules, it is present within the flower near its base
Panicle: inflorescence which is further branched, e.g. the inflorescence of Oncidium sphacelatum
Perianth: when referring to calyx and corolla jointly
Petal: part of corolla (flower)
Petiole: narrow stem-like stalk of a leaf
Pollinia: compact mass of pollen found inside the anther
Pseudobulb: swollen part of a stem, occurring in the base, generally found in epiphytic orchids
Resupinate: when an orchid flower twisted by 108 degrees during development such that the lip comes to lie at the bottom of the flower
Rhizome: modified stem which bears roots, may or may not be subterranean
Scape: stem like structure which bears flowers
Tepals: used for perianth when calyx and corolla are similar
Sepal: individual part of calyx, outer whorls of perianth
Velamen: outer tissue on aerial roots of orchids, having sponge-like nature
Zygomorphic: a structure which can be divided into two similar parts vertically, usually used for flowers
Add Orchid+Glossary+%28Terms+related+to+structure%29 to Twitter Add Orchid+Glossary+%28Terms+related+to+structure%29 to Facebook Add Orchid+Glossary+%28Terms+related+to+structure%29 to MySpace Add Orchid+Glossary+%28Terms+related+to+structure%29 to Del.icio.us Digg Orchid+Glossary+%28Terms+related+to+structure%29 Add Orchid+Glossary+%28Terms+related+to+structure%29 to Yahoo My Web Add Orchid+Glossary+%28Terms+related+to+structure%29 to Google Bookmarks Add Orchid+Glossary+%28Terms+related+to+structure%29 to Stumbleupon Add Orchid+Glossary+%28Terms+related+to+structure%29 to Reddit

Additions to Orchid Glossary
Identifying Orchids
Orchids - A Brief Introduction
Related Articles
Editor's Picks Articles
Top Ten Articles
Previous Features
Site Map

For FREE email updates, subscribe to the Orchids Newsletter

Past Issues

Printer Friendly
tell friend
Tell a Friend
Email Editor

Content copyright © 2015 by Anu Dubey Dharmani. All rights reserved.
This content was written by Anu Dubey Dharmani. If you wish to use this content in any manner, you need written permission. Contact Anu Dubey Dharmani for details.


g features
Where, When And What Orchids To Buy

Pots For Orchids

Cattelyas - General Information

Archives | Site Map


Past Issues

Less than Monthly

BellaOnline on Facebook

| About BellaOnline | Privacy Policy | Advertising | Become an Editor |
Website copyright © 2015 Minerva WebWorks LLC. All rights reserved.

BellaOnline Editor