FLORA OF LAOS Hin Nam No Nature Protected Area Asclepiadaceae Hoya aphylla Aver. & K.S. Nguyen sp. nov. Laos, Khammoune prov., Boualapha distr., Ban Dou village, around Khuay cave, at 17°30'35.1"N, 105°51'28.7"E. Primary dry evergreen and semideciduous broad-leaved forest on very steep rocky slope near karstic hill top composed with solid, marble-like highly eroded limestone at 250-390 m a.s.l. Erect terrestrial and lithophytic herb, later herbaceous or semi-woody vine on rocky slope. Flowers white to light yellowish, corona pale brownish-pink. Not common. 10 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, Littideth Xaiyavongsa, Siphanom Keovankham, AL 890. d-EXSICCATES OF VIETNAMESE FLORA 0318 / AL 890 © L.Averyanov & K.S. Nguyen