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plants-vr-03-bulbs-daffodil - a Daffodil In the spring(2...

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Vegetative reproduction 3 Bulbs - Daffodil scale leaf (leaf bases 2 year’s old) last year’s leaf base flower bud lateral bud (1) WINTER ( dormant ) will form next year’s leaves next year’s terminal bud new leaves and flower grow using food stored in last year’s leaf bases leaves make food which travels to leaf bases last year’s fleshy leaf bases shrivel once food is used (2) EARLY SPRING ( rapid growth ) adventitious roots develop leaves send food to lateral bud (3) LATE SPRING ( flowering finished , seeds dispersed ) flower stalk leaf shoot from lateral bud sheath surrounding leaves last year’s leaf broke off here scale leaves (last year’s sheath) contractile roots DAFFODIL BULB (spring) foliage above ground dies off last year’s withered leaf bases form new scale leaves leaf bases form new bulb daughter bulb Life cycles .
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Unformatted text preview: . a . Daffodil . In the spring (2), adventitious roots grow out of the stem, and the leaves begins to grow above ground, making use of the stored food in the fleshy leaf bases which consequently shrivel. During late spring some of the food made in the leaves in the daffodil is sent to the leaf bases which swell and form a new bulb inside the old one (3). b Tulip and onion. In these bulbs, the food is not sent to the leaf bases but to the lateral buds. As these buds enlarge they form two or more ‘daughter’ bulbs inside the old bulb. The leaves of the old bulb shrivel and dry out forming the dry scales which surround the daughter bulbs. In both cases, when the daughter bulbs grow, they form a clump, together with the parent bulb. (4) SUMMER © D.G. Mackean stem...
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