| Pollinium |
(pol-LIN-ee-um)
pl. pollinia
A compact mass of pollen grains. Often yellow, distinct, and found under the anther cap of the column. |
Last Updated: 04-27-2006 @ 11:11 PM Submitted By: Oscarman
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| Polyploidy |
| The state where all cells have multiple pairs of chromosomes beyond the basic set. |
Last Updated: 04-27-2006 @ 11:11 PM Submitted By: Oscarman
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| Primary Hybrid |
| The progeny which result from a cross between two species. |
Last Updated: 08-01-2006 @ 09:35 PM Submitted By: Oscarman
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| Proliferation |
| A tendency for protocorms to grow into a mass of relatively unorganized plant tissue rather than develop into individual plantlets. |
Last Updated: 04-27-2006 @ 11:12 PM Submitted By: Oscarman
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| Protocorm |
| A swollen tuber-like structure that is the first stage of growth after an orchid seed germinates. |
Last Updated: 04-27-2006 @ 11:12 PM Submitted By: Oscarman
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| Pseudobulb |
(SOO-doh-buhlb) - a false bulb.
Thickened or bulb-like stems produced by some sympodial orchids to store water and food. Most often topped with one or two leaves. Characteristic of orchids whose habitat has seasonal periods of dryness or drought.
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Last Updated: 05-08-2006 @ 11:49 PM Submitted By: Oscarman
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| Pubescent |
| Covered with fine hairs. |
Last Updated: 04-27-2006 @ 11:13 PM Submitted By: Oscarman
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| Quadrigeneric |
| Pertaining to four genera, primarily used to describe hybrids which contain genetic material from four different genera. |
Last Updated: 04-27-2006 @ 11:14 PM Submitted By: Oscarman
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| Raceme |
| An unbranched, elongated inflorescence with stalked flowers, as in Cymbidium, Cattleya, Odontoglossum, etc. In a raceme, the oldest flowers are borne towards the base and new flowers are produced as the shoot grows. |
Last Updated: 01-26-2008 @ 04:55 PM Submitted By: Oscarman
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| Reflasking |
(re-FLASS-king)
Transplanting small seedlings into flasks of fresh medium to permit greater growth before establishing the seedlings into community pots or thumb pots. |
Last Updated: 10-12-2008 @ 01:35 AM Submitted By: Oscarman
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| Respiration |
(res-pi-RAY-shun)
The gaseous diffusion and interchange bewteen the plant cells and the atmosphere in which the plant absorbs oxygen and gives of carbon dioxide. This process occurs in darkness as well as in the light, and in all plant cells whether they contain chlorophyll or not. |
Last Updated: 10-12-2008 @ 02:00 AM Submitted By: Oscarman
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| Resupinate |
(ree-SOO-pin-ayt)
Orchid flower buds which twist through 180 degrees during development, with the result that upon opening the labellum is in the lowermost position to the dorsal Sepal and petals. |
Last Updated: 04-27-2006 @ 11:14 PM Submitted By: Oscarman
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| Rhizome |
(rai-Zoum)
A horizontal growing stem of a plant that often sends out roots and shoots from its nodes. |
Last Updated: 04-27-2006 @ 11:14 PM Submitted By: Oscarman
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| Rupicolous |
Rock-dwelling.
Most often referring to Brazilian Laelias, where they grow on rock outcrops in full sun with nothing more than grasses and detritus to protect the plants, and nightly mist as the main source of moisture.
Rupicolous plants often exhibit extreme drought adaptations to ensure survival in exposed rocky habitats. Their roots creeping along crevices and fast drying water courses and are largely exposed to the fresh air.
Their pseudobulbs and leaves show the characteristics of other xerophytic (air) plants - succulent or leathery foliage geared to conserve water. The degree of succulence varies between those with short stout thick leaved species that live in full exposure to the sun, and those taller leathery blade leaved species sheltering in the partial shade of small shrubs, the elongated inflorescence reaching above the foliage of the surrounding vegetation. |
Last Updated: 05-17-2013 @ 05:35 PM Submitted By: cb977
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| S/H (semi-hydroponic) |
Generally referring to a method of orchid culture which consists of the plant roots growing in an inert media and irrigated on a regular basis with water or a nutrient solution.
Watered is achieved by flooding the pot and allowing the excess to drain away. Fluid absorbed by the media is then slowly released to the plant roots over a period of time.
Alternately, the pot may also feature a small reservoir at the bottom to allow a portion of the watering solution to remain and subsequently wick up through the media for absorption by the plant roots.
The frequency of watering is dependant on several growing condition factors, such as temperature and humidity. |
Last Updated: 12-23-2008 @ 01:08 AM Submitted By: lambelkip
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| Saprophyte |
(SAP-roh-fite)
A plant growing in and deriving most of its nourishment from the decaying organic matter, often apparently lacking in chlorophyl. |
Last Updated: 10-12-2008 @ 01:29 AM Submitted By: Oscarman
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| Scape |
| A leafless flower stalk arising from below, often with a single flower, as in Lycaste. |
Last Updated: 01-26-2008 @ 04:57 PM Submitted By: Oscarman
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| Semi-alba |
| A term applied to a white flower that has a colored lip. |
Last Updated: 01-26-2008 @ 04:57 PM Submitted By: Oscarman
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| Sheath |
(SHEETH)
A modified leaf that encloses and protects an emerging inflorescence or leaf. Normally dries and sloughs off, when Inflorescence or leaf matures.
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Last Updated: 10-12-2008 @ 01:32 AM Submitted By: Oscarman
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