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14 Cards in this Set
- Front
- Back
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Stages in plant growth |
Seed - embryonic plant in seed waiting for conditions to germinate Juvenile - vegetative growth but plant cannot flower or reproduce sexually yet Adult - reached maturity, can flower and reproduce sexually Senescence - plant in decline Death - end of plant's lifecycle |
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Define annual |
Annual plants germinate, grow, flower, set seed and die all within 12 months. Calendula officinalis |
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Define ephemeral |
Some species of short lived annuals, particularly weeds, can complete several life cycles per year. Senecio vulgaris |
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Define biennial |
A true biennial lives for two years. The first year's growth is usually vegetative (roots, stems and leaves). The second year the plant flowers, sets seed and dies. Digitalis purpurea |
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Define perennial |
Perennial species live for a minimum of three years but often much longer. Bergenia cordifolia |
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'Horticulture' biennials |
Botanically perennials but are grown like biennials and removed having flowered once. Myosotis sylvatica (forget-me-not) |
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Define herbaceous |
Never form wood in stems or roots Hosta spp. or Senecio cineraria 'Silver Dust' |
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Define woody |
Woody perennials form wood in their stems and roots as a result of secondary growth Choisya ternata Thymus vulgaris |
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Define evergreen |
Plants retain green leaves throughout the year Ilex aquifolium Bergenia cordifolia |
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Define semi-evergreen |
Shed most of their leaves in autumn but retain a few green leaves throughout winter Ligustrum vulgare Quercus x turneri |
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Define tender perennial |
Cannot survive being frozen (below 1C) Canna indica Pelargonium zonale |
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Define half hardy annual |
Can survive temperatures to -5C and sown under protection early in the season Tagetes patula Lobelia erinus |
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Define hardy annual |
Can withstand tempertures to -10C and can be sown outside in situ as early as March Helianthus annuus Calendula officinalis |
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Define tree and shrub |
Trees naturally produce a single, persistent woody stem from ground level Quercus robar Carpinus betula Shrubs naturally produce multiple persistent woody stems from ground level Sarcococca confusa Viburnum tinus |
