Bulbophyllum sect. Beccariana

Kurniawan, Firman H., Yudistira, Yuda R. & Mustaqim, Wendy A., 2022, A new species of Bulbophyllum (Orchidaceae: Epidendroideae) from Kalimantan Barat, Indonesia, Phytotaxa 544 (1), pp. 89-94 : 93

Amendments to the key to Bornean Bulbophyllum sect. Beccariana (modified from Vermeulen et al. 2015).

19 Labellum adaxially partly or entirely finely pubescent....................................................................................................................20

– Labellum adaxially glabrous ............................................................................................................................................................21

20 Inflorescence 7–15-flowered ......................................................................................................................................... B. anaclastum

– Inflorescence 1–3-flowered ........................................................................................................................................... B. reticulatum

21 Labellum not dorsoventrally flattened near the base........................................................................................................ B. artvogelii

– Labellum dorsoventrally flattened near the base..............................................................................................................................22

22 Angle between the vein towards the stelidia apex and the axis of the wing along their lower margin distinctly larger than 45° ....... ..........................................................................................................................................................................................................22

– Angle between the vein towards the stelidia apex and the axis of the wing along their lower margin 45° or smaller....................23

22 Labellum subsagittate to subtriangular, length per width ratio 2.7−3.2, adaxial surface verrucose; anterior part of connective drawn out, slightly erose..................................................................................................................................................... B. sungaiutikense

– Labellum ovate to subtriangular, length per width ratio 1.0−1.4, adaxial surface flat; anterior part of connective not drawn out, not erose.................................................................................................................................................................................... B. aeolium

23 Inflorescence 1−2-flowered............................................................................................................................................. B. uniflorum

– Inflorescence 4−12-flowered............................................................................................................................................ B. ericssonii