Hoya hanhiae sp. nov. (Apocynaceae, Asclepiadoideae) from central Vietnam

Abstract

A new species, Hoya hanhiae V. T. Pham et Aver. discovered in central Vietnam is described, illustrated and compared with the related species H. macrophylla Bl. and H . verticillata (Vahl) G. Don.

Preliminary checklist of Hoya (Asclepiadaceae) in the flora of Cambodia, Laos and Vietnam

“…According to available collections, it is not rare in its limited area in central part of Vietnam. Ink and color illustrations of this species were presented in early publication (Pham, Averyanov, 2012). Green, 2008, Fraterna 21, 2: 22;id., 1994, Fraterna 4: 4, nom.…”

“…(Brown, 1810) includes 350-450 currently accepted species found throughout tropical Asia, tropical Pacific islands and NE Australia (Li et al, 1995;Forster, Liddle, 1996;Forster, 2006;Liddle, 2009;Rodda, 2015). Mainland southeast Asia and particularly the Indochinese Peninsula should be presently recognized as one of the richest areas of the genus species diversity with 41 species recorded up to now in Thailand (Thaithong, 2001;Kidyoo, Thaithong, 2007a, b), 32 species in southern China (Li et al, 1995), 26 species in Vietnam (Costantin, 1912;Pham, 2003;Tran, 2005;Tran et al, 2011a, b;Pham, Averyanov, 2012;Rodda et al, 2012Rodda et al, , 2015Pham et al, 2015), 19 species in Myanmar (Kress et al, 2003), 10 species in Lao PDR (Newman et al, 2007, Rodda, 2012Rodda et al, 2015) and five species in Cambodia (Costantin, 1912). Meanwhile, countries of eastern Indochina including Cambodia, Laos and Vietnam certainly rich in Hoya species remain up to the present study insufficiently studied.…”

“…globulosa, H. micrantha, H. oblongacutifolia, H. verticillata respectively. Table 1 Species of Hoya R. Br. reported in the flora of Cambodia, Laos and Vietnam (Costantin, 1912;Tran, 2005;Pham, 2003;Tran et al, 2011b;Pham, Averyanov, 2012;Rodda, 2012;Rodda, Simonsson Juhonewe, 2012a, b;Rodda et al, 2012Rodda et al, , 2015Pham, Averyanov 2012;Pham et al, 2015).…”

Hoya longlingensis and H. sichuanensis (Apocynaceae), Two New Species from Southwestern China

“…In the past decade, multiple new species or newly recorded species of this genus have been discovered in Southwestern China resulting from extensive field investigations conducted [3][4][5][6][7][8][9][10][11]. Many new species of this genus were reported from the adjacent areas of China [12][13][14][15][16][17][18][19][20]. We collected two unidentified Chinese Hoya species in Sichuan and Yunnan provinces during our recent expeditions in 2018 and 2021.…”

Hoya tamdaoensis (Apocynaceae, Asclepiadoideae), a new species from Vietnam

“…Since then, the number of Hoya species in Vietnam has almost doubled (Phạm 2003, Phạm & Averyanov 2011, Trần et al 2011a, 2011b, Phạm et al 2012, Rodda 2012, Rodda & Simonsson Juhonewe 2013, Phạm et al 2014. The percentage of taxa endemic to Vietnam is high with only eight species also found in neighboring China (Li et al 1995, Rodda 2012) and six in Lao PDR (Newman et al 2007, Rodda 2012.…”