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NZ Plants

Carmichaelia williamsii - William’s broom, giant-flowered broom

Pea family: Fabaceae

Carmichaelia williamsii is a stout woody shrub with flattened green stems (cladodes). Small leaves divided into 2-3 leaflets occur on seedlings or on shaded stems. Flowers are conspicuous for their large size and creamy-yellow colour. Named after the missionary and first bishop of Waiapu, William Williams (1800-1878).
An endemic coastal species found in the upper half of the North Island where it occurs on the mainland in two populations near East Cape and on several offshore islands.  

Vegetative characteristics

Reproductive characteristics

Plant form: shrub up to 4 m

Arrangement of parts: asymmetric


Flower size: 18-25 mm diam.

Leaf form: leaves reduced to scales on older stems; on seedlings, divided into 1-3 oval-oblong leaflets

Sepals: 5

Leaf size: 1-3 foliate leaves 6-23 mm long

Petals:  5, yellow to cream

Leaf arrangement: singly along stem

Sexuality: bisexual

Leaf attachment: stipules

Stamens: 10

Leaf margin: smooth

Ovary: above

Leaf surface: sparse hairs

Fruit: dry