| Haploid |
| Cells bear one copy of each chromosome. |
Last Updated: 04-23-2006 @ 04:07 PM Submitted By: Oscarman
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| Harlequin |
Most commonly used to describe a phalaenopsis color type originally resulting from the mutation of mericloned Phal. Golden Peoker.
Harlequin phalaenopsis typically exhibit asymmetrical spotting and heavier substance with dark beet-purple pigments.
Often the heavier the color saturation, the poorer the shape.
In most cases Harlequin phalaenopsis are longer lasting than standard white phalaenopsis in same growing condition. |
Last Updated: 11-17-2007 @ 01:51 PM Submitted By: Oscarman
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| Herbarium |
| An institution in which dried plant specimens are preserved and where research into plants and their taxonomy and ecology takes place. |
Last Updated: 04-23-2006 @ 04:07 PM Submitted By: Oscarman
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| Heterosis |
| Hybrid vigor, or the increased strength and the tolerance of varying conditions that are often found in the offspring of different species or genera. |
Last Updated: 08-02-2006 @ 11:58 AM Submitted By: Tindomul1of9
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| HID |
High Intensity Discharge lights.
A general term for mercury, metal halide and high-pressure sodium lamps. HID lamps contain compact arc tubes which enclose various gases and metal salts operating at relatively high pressures and temperatures. |
Last Updated: 07-20-2006 @ 11:08 PM Submitted By: Oscarman
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| HPS (High Pressure Sodium) |
| A high intensity discharge (HID) lamp in which the light is produced by igniting sodium, mercury and xenon gases within a sealed ceramic arc tube. Sodium lamps emit light energy in the yellow, orange and red regions of the spectrum; the red spectrum stimulates flowering and fruit production. |
Last Updated: 07-20-2006 @ 11:12 PM Submitted By: Oscarman
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| Hybrid |
| The offspring of a cross between two species, two hybrids or one species and one hybrid. |
Last Updated: 04-23-2006 @ 05:01 PM Submitted By: Oscarman
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| Hydroponics |
| Literally, "water work": a technique of growing plants in a sterile medium (or no medium at all) and flooding the roots periodically with a nutrient solution. |
Last Updated: 08-02-2006 @ 12:11 PM Submitted By: Tindomul1of9
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