Question: Which form of plant is only found in Australia, Hakea or Blechnum?

full_context: Document 1: Hakea gibbosa: Hakea gibbosa, commonly known as hairy hakea or rock hakea, is a shrub of the family Proteaceae native to southeastern Australia. It has become an environmental weed in South Africa and New Zealand, where it had been introduced for use as a hedge plant.
Document 2: Lophosoria quadripinnata: Lophosoria quadripinnata is a species of fern that, according to DNA molecular analysis, belongs to the Dicksoniaceae family, where it is placed in the genus "Lophosoria". It is found in the Americas spanning from Cuba and Mexico to Chile. In Chile it is present in the area between Talca and Aysén including Juan Fernández Islands. In Argentina it grows only in the humid valleys of western Neuquén and Río Negro Province. Diamondleaf fern is a common name. In Spanish it is known as 'ampe' (from the Mapudungun añpe) or palmilla, but one has to remember that there are several species of ferns called "palmillas" that have larger or smaller fronds, and which grow in colder climates. It is a medium-sized plant, growing to about 4–5 feet (though 10–12 feet in a sheltered place at Arduaine Garden in Argyll, Scotland) and even though the rhizome does not grow a trunk, it is clearly related to the other tree ferns due to features that were apparently already present in their common ancestor, like 'pneumathodes', and the rhizome which changed from the dorsiventral symmetry typical of the other ferns, to a radial symmetry typical of tree ferns. Their large and multiple pinnate fronds, with the petiole raised adaxially, and the hairs on the rhizome and lower part of the petioles, also resemble those of tree ferns. To identify the species, use the position and characteristics of the spores found on the fertile fronds. The genus already existed in the Cretaceous Period in southern Gondwana according to fossil remains found in Antarctica. The species is well known as an ornamental plant.
Document 3: Tree fern: The tree ferns are the ferns that grow with a trunk elevating the fronds above ground level. Most tree ferns are members of the "core tree ferns", belonging to the families Dicksoniaceae, Metaxyaceae, and Cibotiaceae in the order Cyatheales. In addition to those families, many ferns in other groups may be considered tree ferns, such as several ferns in the family Osmundaceae, which can achieve short trunks under a metre tall, and particularly ferns in the genus "Cibotium", which can grow ten metres tall. Fern species with short trunks in the genera "Blechnum, Calochleana, Cnemedaria, Culcita" (Europe's only tree fern), "Cystodium, Leptopteris, Lophosoria, Sadleria, Thyrsopteris" and "Todea" could also be considered tree ferns in a liberal interpretation of the term.
Document 4: Hakea preissii: Hakea preissii, commonly known as the Needle tree, Needle bush and Christmas hakea, is a shrub or tree of the genus "Hakea" native to an area in the Pilbara, Wheatbelt, Mid West and Goldfields-Esperance regions of Western Australia. The Noongar name for the plant is Tanjinn.
Document 5: Athyrium filix-femina: Athyrium filix-femina, the lady fern or common lady-fern, is a large, feathery species of fern native throughout most of the temperate Northern Hemisphere, where it is often abundant (one of the more common ferns) in damp, shady woodland environments and is often grown for decoration.
Document 6: Hakea microcarpa: Hakea microcarpa , commonly known as small-fruit hakea is a flowering plant in the family Proteaceae and is endemic to eastern Australia. It is a spreading shrub, often growing in woodlands, heathlands and near swamps in montane areas of eastern Australia.
Document 7: Adiantum capillus-veneris: Adiantum capillus-veneris, the Southern maidenhair fern, black maidenhair fern, maidenhair fern, and venus hair fern, is a species of ferns in the genus "Adiantum" and the family Pteridaceae with a subcosmopolitan worldwide distribution. It is cultivated as a popular garden fern and houseplant.
Document 8: Polypodium: Polypodium is a genus of 75–100 species of true ferns, widely distributed throughout the world, with the highest species diversity in the tropics. The name is derived from Ancient Greek "poly" (πολύ) "many" + "podion" (πόδιον) "little foot", on account of the foot-like appearance of the rhizome and its branches. They are commonly called polypody or rockcap fern, but for many species unique vernacular names exist.
Document 9: Blechnum: Blechnum (hard fern) is a genus of between 150–220 species of ferns with a cosmopolitan distribution, in the family Blechnaceae in the eupolypods II clade of the order Polypodiales. By far the greatest species diversity is in tropical regions of the Southern Hemisphere, with only a few species reaching cool temperate latitudes in the Southern Hemisphere (notably "B. penna-marina", south to Cape Horn, Chile, the southernmost fern in the world) and Northern Hemisphere (notably "B. spicant", north to Iceland and northern Norway).
Document 10: Hakea aculeata: Hakea aculeata, commonly known as the Column Hakea, is a vulnerable species of "Hakea" found in the Brookton, Cunderdin, Merredin, Tammin and Quairading areas in the Wheatbelt region of Western Australia.
Document 11: Polystichum: Polystichum is a genus of about 260 species of ferns with a cosmopolitan distribution. The highest diversity is in eastern Asia, with about 120 species in China alone; the region from Mexico to Brazil has nearly 100 additional species; Africa (17 species), North America (15 species), and Europe (5 species) have much lower diversity. Polystichum species are terrestrial or rock-dwelling ferns of warm-temperate and montane-tropical regions (a few species grow in alpine regions).
Document 12: Hakea: Hakea (pincushion tree) is a genus of 149 species of shrubs and small trees in the Proteaceae, native to Australia. They are found throughout the country, with the highest species diversity being found in the south west of Western Australia.
Document 13: Polystichum aleuticum: Polystichum aleuticum, the Aleutian holly fern or Aleutian shield fern, is an endangered species of the "Polystichum" genus and currently consisting of a small, vulnerable population endemic found only on Adak Island, Alaska, a remote island of the Aleutian Islands chain in the northern Pacific Ocean. In 1992, 112 specimens existed in the wild, and a recovery plan was implemented.
Document 14: Hakea leucoptera: Hakea leucoptera is a plant of the dry regions of Australia. The species is often referred to as silver needlewood, needle hakea, pin bush, and water tree. It has several indigenous names; Booldoobah, Uri, Kuluva, and Kuloa. The specific epithet, derived from the Latin "Leucoptera" (Gk): "leuco" means "white"; and "ptera" means "winged", referring to the characteristic white-winged seeds of this species.
Document 15: Hakea victoria: Hakea victoria, with common names Royal Hakea and Lantern Hakea, is a shrub which is native to Western Australia and noted for its ornamental foliage. The Noongar name for the plant is Tallyongut.
ground_truth: Hakea