Showing posts with label Myrtaceae - Taxandria. Show all posts
Showing posts with label Myrtaceae - Taxandria. Show all posts

30 June 2009

Taxandria marginata - Myrtaceae

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Taxandria marginata - Myrtaceae

Taxandria marginata was previously known as Agonis marginata, but in 2007 the Agonis genus was split into three genera, Taxandria, Paragonis and Agonis. The most obvious difference between them is the number a stamens each have, with Taxandria having 10 or fewer, Agonis 15-30 and Paragonis 22-35, there are other differences like flower size, number of ovules per cell, etc., but stamen number is the quickest way to determine genus.

In the Esperance region Taxandria marginata is mainly found to the east of Esperance, from the coast to about 100 km (60 miles) inland and largely restricted to granite outcrops. In coastal situations this shrub will grow to 3 metres (10') in height, but is often stunted by strong winds to be much less than this. On large granite outcrops away from the influence of strong coastal winds, this spreading bushy shrub can grow taller, but here they usually follow sunken wide vegetated drainage channels, which often lead to swampy areas at their base. Although very bushy to ground level, if you can find an opening, they are reasonably open inside with a dense overhead, green umbrella like canopy and thick leaf-litter underfoot. The loose bark covered trunks angle outwards to eventually overpower and smother nearby smaller shrubs to create this habitat, which in consolation, can provide an excellent sheltered environment for orchids and various shade loving plant species.


The leaves are a rich green and when young, with a row of neat, short white hairs around their edge. Providing there is sufficient rainfall, flowers will bloom for long periods with new ones continuingly developing in growing leaf axils, this generally happens from autumn through to spring.


23 March 2009

Taxandria spathulata

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Taxandria spathulata

Taxandria was previously known as Agonis and contain plants that have flowers like Tea Tree (Leptospermum), but seed capsules like Paperbark (Melaleuca). The flowers are grouped into numerous tight spheres and the resulting fused woody seed capsules develop into globular football looking clusters, which usually remain on these shrubs like Melaleuca species. Tea Tree flowers by comparison, occur individually and mostly fall annually.

Taxandria spathulata is one of the smaller shrubs from this genus, growing to 2 metres (about 6') in height, but more commonly less than 1 metre. It grows in a wide variety of soil types and is often the dominant shrub of flat low-lying sandy areas that retain moisture for extended periods, but it can also be found (although not dominant) in dry elevated habitats of deep sandy soil amongst heath species. Regenerating from seed after fire, it is quite fast growing and quickly spreads to about 2 metres (around 6') diameter, with untidy long leggy stems supporting scattered foliage and flowers, and unless cut back will die-off within a few years.

Some forms of this species, or those that have been cut-back, can be quite showy and longer lived with more closely arranged flowering heads and compact small spoon-shaped leaves. The white flowers are insect attracting and the local flowering period is from September to November.