Chromosome Number Changes

Chromosome Number Changes Chromosomal variation is widespread in plants. Within a given genus or species the plants may have small differences in chromosome numbers (which is the characteristic number of chromosomes contained in the cell nucleus of a given species). Changes in chromosome number can occur by the addition of all or part of a chromosome, the loss of an entire set of chromosomes or the gain of one or more sets of chromosomes.

Latin Name	Location	Flowering season	Description
Antirrhinum majus Snapdragon	Chromosome variant	Summer to autumn	An herbaceous perennial plant native to the Mediterranean area which grows up to 1m tall. Flowers are produced on a tall spike.
Fritillaria persica 'Adiyaman' Persian lily	Chromosome variant	Spring	A bulbous perennial native to Southern Turkey, Iran and Iraq. It grows up to 90cm tall and bears bell shaped flowers.
Hyacinthus orientalis 'L'Innocence' Common hyacinth or Dutch hyacinth	Chromosome variant	Late winter to early spring	A bulbous perennial that grows up to 30cm with fragrant white bell-shaped flowers.
Hyacinthus orientalis ‘Myosotis’ Common hyacinth or Dutch hyacinth	Chromosome variant	Late winter to early spring	A medium blue hyacinth.
Hyacinthus orientalis 'Ostara' Common hyacinth or Dutch hyacinth	Chromosomes variant	Late winter to early Spring	A deep blue hyacinth.
Lysimachia nummularia Creeping Jenny, Moneywort	Coloured foliage	Summer	A hardy plant providing excellent ground coverage. The Latin nummularia means ‘like a coin’ and refers to the golden colour and shape of the flowers.
Lysimachia nummularia 'Aurea' Golden creeping Jenny	Coloured foliage	Summer	Similar to Lysimachia nummularia but with yellow foliage.
Muscari armeniacum Grape hyacinth	Chromosome variant	Spring	A bulbous plant with short flowering stems that grows to around 15cm tall.
Narcissus 'Geranium'	Chromosome variant	Spring	A bulbous, herbaceous perennial plant, growing up to 35cm tall. It has fragrant, long lasting flowers.
Narcissus 'Inglescomb'	Chromosome variant	Spring	A bulbous perennial plant, which double blooms. It grows to around 30cm.
Oenothera odorata	Chromosome variant	Summer	A hardy perennial with tightly scrolled buds which are a pale lemon yellow when first open, maturing to an apricot yellow and finally a salmon-pink.
Oenothera tetragona var. riparia Swamp evening primrose	Chromosome variant	Summer	A perennial that grows to 15-60cm with bright-yellow flowers with four petals.
Ranunculus ficaria Lesser celandine	Chromosome variant	Early spring	A low-growing, hairless perennial flowering plant in the buttercup family. It has dark green, heart-shaped leaves and bright yellow, glossy flowers.
Thuja plicata Giant cedar	Hybrids		An evergreen coniferous tree in the cypress family native to western North America. It is a large to very large tree, ranging up to 65-70m tall and 3-4m in trunk diameter. The foliage forms flat sprays which are green above and green marked with whitish stomatal bands below.