[2] According to the study, the crown group of Diplazium originated in Eurasia and completed the initial diversification in the northern hemisphere.

[2] The distribution of Diplazium australe is Wet Tropics, Eungella and subtropical and temperate eastern Australia, also in New Zealand.

On the lateral veins, sporozoites are frequently found in pairs, are oblong, and are covered by a swelling membrane.

Rhizome up to 80 mm long, with a slender, woody caudex that is first coated in dull dark brown to black scales.

The edges are bluntly serrated or shallowly lobed less than half-way to the costule, abaxially decurrent, and the apex is obtuse.

Diplazium australe is also a vascular plant whose survival period is often referred to as alternation of generations, characterized by diploid sporophyte and haploid gametophyte stages.

Fronds almost erect, mostly 0.4–1.2 m long, sometimes to 2 m; stipe stout and fleshy, dark at the base, paler above; secondary rachises not much darker at their junction with the main rachis; lamina 2-pinnate with secondary pinnae lobed almost to midvein; ultimate segments 5–25 mm long, toothed.

Leaves clustered; petiole fleshy, 6–13 cm long, 1.5-2.5 cm thick, light green, base densely covered with the same scales as those on rhizomes, upwards and leaves are sparsely covered with small brown-brown star-shaped scales, later part shedding The leaves are linear-lanceolate, 15–30 cm long, 4–7 cm wide, with a pointed tail, bipinnate; pinnae 20-35 pairs, 1-1.5 cm apart, opposite, or only at base, alternate upward, nearly spreading, sessile, slightly sparse from each other, lower pinna slightly shortened, middle pinna 2.5–4 cm long, 7–8 mm wide, linear, slightly Sickle-shaped, blunt or round head, base is slightly oblique circular truncation, slightly asymmetric, upper side close to leaf axis, pinnate;[7] pinnae 10–16 pairs, alternate or subopposite, obliquely spread, each other Closely connected, linear, more or less upwardly curved, 3–4.5 mm long, 1.5 mm wide, rounded or blunt, base connate with rachis and connected by broad wings, entire, base paired or only the upper side is often doubled To three-lobed, the lobes are the same shape as the pinnae and much shorter.

The leaves are nearly succulent, grass green when dry, densely covered with brown-brown star-shaped small scales when they are young, then gradually become smooth on the top, and one or two pieces remain on the bottom; The top is raised, with broad wings on both sides, all sparsely covered with one or two small scales.

[8] Sporophyte structure of Diplazium australe: Due to the morphological diversity and lack of molecular phylogenetic analysis of these ferns, as well as the lack of understanding of genus boundaries and affiliations, Diplazium was subsequently investigated based on the study of more than 6000 DNA nucleotides in seven plastid genome regions.

congrua, with which it shares a lot of space, partially because both Diplazium and Deparia contain sori that are organized in a herringbone pattern, which can also be mistaken for Asplenium.

As a consequence of human disturbance, it appears to have thrived and increased its distribution in New Zealand, and it is now one of our most common, weedy, indigenous urban ferns diplazium: Southern, from the Latin australis.

Diplazium australe is not of immediate economic importance and is generally used as a biofertilizer because its nitrogen-fixing ability converts nitrogen from the air into compounds that other plants can use.

Diplazium australe can also be used as a raw material for anthelmintics, and in some areas is used as a food source by indigenous societies.

For example, in the plantation industry, Diplazium australe is a weed whose ability to absorb nutrients from the soil is much higher than that of agricultural crops, and is usually processed in batches.