William Philipson

Anakasia simplicifolia is a species of plant in the family Araliaceae, the only species of the genus Anakasia. It is endemic to Western New Guinea.

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Kairoa is a genus of flowering plants belonging to the family Monimiaceae. Its native range is New Guinea. Species: Kairoa cromeana W.N.Takeuchi Kairoa endressiana W.N.Takeuchi & S.S.Renner Kairoa suberosa Philipson Kairoa villosa (Kaneh. & Hatus.) S.S.Renner & W.N.Takeuchi

Inga macarenensis is a species of plant in the family Fabaceae. It is found only in Colombia.

Pseudopanax laetus, the shrub panax, is a species of flowering plant in the subfamily Aralioideae, family Araliaceae, native to the North Island of New Zealand. It is a member of the Neopanax clade, and occasionally referred to as Neopanax laetus. It has gained the Royal Horticultural Society's Award of Garden Merit.

Pseudopanax colensoi, commonly known as the mountain fivefinger in English and orihou in Māori, is an endemic species to New Zealand. It is a shrub that can often grow into a small canopy tree, and is found in high altitude environments in its preferred areas around New Zealand. It is a member of the Neopanax clade, and is referred to by some sources as Neopanax colensoi.

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Trimenia moorei, the bitter vine, is a climbing plant found in eastern Australia.

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Macropanax maingayi is a tree in the family Araliaceae. It was first described from Malacca as Hederopsis maingayi in 1879. William Raymond Philipson moved it to the genus Macropanax in 1979. It is native to a wide area of SE Asia, including Sumatra in Indonesia to Vietnam. Somehow this species was added under the old synonym Hederopsis maingayi in the 1990 book Endemic trees of the Malay Peninsula by the Forestry Department of Malaysia, with the author stating it was only found in Peninsular Malaysia. Due to this mistake the IUCN claimed in 1998 it was an endemic "threatened species",

Parakibara is a monotypic genus of flowering plants belonging to the family Monimiaceae. The only species is Parakibara clavigera. It is endemic to the Maluku Islands.

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Osmoxylon lanceolatum is a species of plant in the family Araliaceae. It is endemic to Papua New Guinea.

Harmsiopanax ingens is a very spiny palmlike mesocaul tree in the family (Araliaceae), endemic to the montane rainforests of central New Guinea which bears a terminal rosette of deeply lobed, dentate margined, usually (but not invariably) peltate leaves 1 m (3 ft 3 in) across, maple-like in shape, on equally long petioles. It ultimately attains a height of 18 m (59 ft), at which point it bears a huge panicle of flowers 5 m (16 ft) high and equally wide; the largest above ground inflorescence of any dicot plant (although Caloncoba flagelliflora of West Africa, Ficus geocarpa of the Malay

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