Two new species of Hoya R.Br. (Apocynaceae, Asclepiadoideae) from Borneo

Hoya amicabilis sp. nov. (Apocynaceae, Asclepiadoideae), from Java discovered on Facebook

“…Internet has greatly helped popularizing the culture of Hoya and in recent years numerous species made their appearance online, either on Facebook or on commercial websites before they were formally named, including Hoya papaschonii Rodda (Rodda and Ercole 2014), Hoya ruthiae Rodda (Rodda 2015), Hoya undulata S. Rahayu & Rodda (Rahayu et al 2015), Hoya isabelchanae Rodda & Simonsson (Rodda and Simonsson-Juhonewe 2016), Hoya narcissiflora S. Rahayu & Rodda (Rahayu and Rodda 2017), Hoya migueldavidii Cabactulan, Rodda & R.B.Pimentel (Cabactulan et al 2017), Hoya corneri Rodda & S.Rahayu (Rodda and Rahayu 2018) and Hoya solokensis S. Rahayu & Rodda (Rahayu and Rodda 2019). are well known ornamentals and widely cultivated outdoors in the tropics as well as indoors in temperate climates.…”

“…Numerous associations aimed at popularizing the cultivation and the introduction of rare, hard to grow or recently introduced Hoya species have been established in many countries, starting in America and Europe and more recently also in tropical Asia. Internet has greatly helped popularizing the culture of Hoya and in recent years numerous species made their appearance online, either on Facebook or on commercial websites before they were formally named, including Hoya papaschonii Rodda (Rodda and Ercole 2014), Hoya ruthiae Rodda (Rodda 2015), Hoya undulata S. Rahayu & Rodda (Rahayu et al 2015), Hoya isabelchanae Rodda & Simonsson (Rodda and Simonsson-Juhonewe 2016), Hoya narcissiflora S. Rahayu & Rodda (Rahayu and Rodda 2017), Hoya migueldavidii Cabactulan, Rodda & R.B.Pimentel (Cabactulan et al 2017), Hoya corneri Rodda & S.Rahayu (Rodda and Rahayu 2018) and Hoya solokensis S. Rahayu & Rodda (Rahayu and Rodda 2019). Social media have been a useful tool for the recognition of new species and in 2015 Drosera magnifica Rivadavia & Gonella (Gonella et al 2015) was the first new species to be discovered based on photographs published on Facebook.…”

Hoya tengchongensissp. nov. (Apocynaceae, Asclepiadoideae) from Yunnan, China

“…The genus Hoya R. Brown (1810, p. 459) (Apocynaceae, Asclepiadoideae) includes around 300 species in tropical Asia, the Pacific Islands and Australia (Forster and Liddle 1996, Forster 2006, Liddle 2009, Rodda 2015, Averyanov et al 2017, with great diversity in New Guinea, Indonesia, Philippines and Malaysia (Kloppenburg 1991, Forster 2006, Pham and Averyanov 2012, Rodda 2012, Averyanov et al 2017). Due to their ornamental value in gardening, botanists and horticulturists have collected and cultivated many Hoya spp.…”

Hoya of the Philippines part I. Hoya migueldavidii (Apocynaceae, Asclepiadoideae), a new species from Northern Mindanao, Philippines

“…Hoya R.Br., with an estimated 350–450 species (Rodda 2015) is the largest genus of Apocynaceae. The Philippines are, together with Borneo and New Guinea one of the centres of diversity of the genus.…”