Question: What family is the planet in whose fallen foliage Pestalotiopsis microspora was first identified?

Context paragraphs:
Pestalotiopsis microspora: Pestalotiopsis microspora is a species of endophytic fungus capable of breaking down and digesting polyurethane.  Originally identified in fallen foliage of common ivy ("Hedera helix") in Buenos Aires, it also causes leaf spot in Hidcote ("Hypericum patulum") shrubs in Japan.

Serpin: Serpins are a superfamily of proteins with similar structures that were first identified for their protease inhibition activity and are found in all kingdoms of life.  The acronym serpin was originally coined because the first serpins to be identified act on chymotrypsin-like serine proteases (serine protease inhibitors).  They are notable for their unusual mechanism of action, in which they irreversibly inhibit their target protease by undergoing a large conformational change to disrupt its active site.  This contrasts with the more common competitive mechanism for protease inhibitors that bind to and block access to the protease active site.

Australian bat lyssavirus: Australian bat lyssavirus (ABLV) (initially named pteropid lyssavirus PLV) is a zoonotic virus closely related to rabies virus.  It was first identified in a 5-month-old juvenile black flying fox ("Pteropus alecto") collected near Ballina in northern New South Wales, Australia in January 1995 during a national surveillance program for the recently identified Hendra virus.  ABLV is the seventh member of the lyssavirus genus (which includes rabies virus) and the only lyssavirus family member present in Australia.

Triffin dilemma: The Triffin dilemma or Triffin paradox is the conflict of economic interests that arises between short-term domestic and long-term international objectives for countries whose currencies serve as global reserve currencies.  This dilemma was first identified in a 1929 book, "Gold and Central Banks", by Polish economist Feliks Młynarski, who identified a fundamental instability in a gold-based international monetary system, that the reserve currency countries would tend to accumulate foreign reserves, but as the volume of these grew relative to the country's gold reserves, international investors would begin to fear suspension of convertibility; later in the 1960s, it was rediscovered in the context of the Bretton Woods system by Belgian-American economist Robert Triffin, who pointed out that the country whose currency, being the global reserve currency, foreign nations wish to hold, must be willing to supply the world with an extra supply of its currency to fulfill world demand for these foreign exchange reserves, thus leading to a trade deficit.  Due to Młynarski's precedence in articulating the problem, Barry Eichengreen has suggested renaming the problem to "the Młynarski dilemma".

Hedera helix: Hedera helix (common ivy, English ivy, European ivy, or just ivy) is a species of flowering plant in the family Araliaceae, native to most of Europe and western Asia.  A rampant, clinging evergreen vine, it is a familiar sight in gardens, waste spaces, on house walls, tree trunks and in wild areas across its native habitat.

Smithsonite: Smithsonite, or zinc spar, is zinc carbonate (ZnCO), a mineral ore of zinc.  Historically, smithsonite was identified with hemimorphite before it was realised that they were two distinct minerals.  The two minerals are very similar in appearance and the term calamine has been used for both, leading to some confusion.  The distinct mineral smithsonite was named in 1832 by François Sulpice Beudant in honor of English chemist and mineralogist James Smithson (c.1765–1829), whose bequest established the Smithsonian Institution and who first identified the mineral in 1802.

Lettuce necrotic yellows virus: Lettuce necrotic yellows virus (LNYV) is a plant virus belonging to the virus order "Mononegavirales", family "Rhabdoviridae" and genus "Cytorhabdovirus".  It was first identified in Australia in the plant species "Lactuca sativa" in 1963 by Stubbs et al.  Since then it has been identified in many other plant species including "Datura stramonium" and "Nicotiana glutinosa".  The virus is transmitted by the insect vector "Hyperomyzus lactucae" the insect can become infected by feeding on an infected plant.  It then acts as a reservoir for the virus in which it can multiply.  The virus is also transmitted congenitally to its progeny

Texas phoenix palm decline: Texas Phoenix palm decline is a plant disease caused by a phytoplasma, "Candidatus" Phytoplasma palmae.  It takes its name from the state it was first identified in and the palm species, "Phoenix", upon which it was first identified.  It is currently found in parts of Florida and Texas.

5F-ADB: 5F-ADB (also known as 5F-MDMB-PINACA) is an indazole-based synthetic cannabinoid from the indazole-3-carboxamide family, which has been used as an active ingredient in synthetic cannabis products and has been sold online as a designer drug.  5F-ADB is a potent agonist of the CB receptor, though it is unclear whether it is selective for this target.  5F-ADB was first identified in November 2014 from post-mortem samples taken from an individual who had died after using a product containing this substance.  Subsequent testing identified 5F-ADB to have been present in a total of ten people who had died from unexplained drug overdoses in Japan between September 2014 and December 2014, and it was added to the Japanese banned drug list in December 2014.  5F-ADB is believed to be extremely potent based on the very low levels detected in tissue samples, and appears to be significantly more toxic than earlier synthetic cannabinoid drugs that had previously been sold.

Rhene pinguis: Rhene pinguis is a jumping spider species in the genus "Rhene" that was first identified in South Africa.  The male was first identified in 2009.

Supporting paragraphs: Pestalotiopsis microspora Hedera helix
Answer: Araliaceae