Bulbophyllum (sect. Rhytionanthos) J. J. Vermeulen, Schuiteman & de Vogel 2014
Creators: name: Dang, Minh Quan
name: Averyanov, Leonid V.
name: Dang, Van Son
name: Maisak, Tatiana
name: Bui, Van Huong
name: Tu, Bao Ngan
name: Truong, Ba Vuong
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Asparagales
Orchidaceae
Bulbophyllum

description: The key for identification of species Bulbophyllum sect. Rhytionanthos in the flora of Vietnam
1. Lateral sepals caudate.........................................................................................................................................................................2
- Lateral sepals not caudate...................................................................................................................................................................3
2. Inflorescence with 1–5 flowers; upper margin of lateral sepals free in basal half; petal margin slightly erose; upper margin of stelidia erose ............................................................................................................................................................ 1 B. emarginatum
- Inflorescence with 1–2 flowers; upper margin of lateral sepals free only at base; petal margin irregularly dentate; upper margin of stelidia entire ................................................................................................................................................... 2 B. paraemarginatum
3. Lateral sepals verrucose, sparsely papillose or with clavate hairs, margin hairy...............................................................................4
- Lateral sepals smooth, glabrous, margin entire ..................................................................................................................................6
4. Pedicel and ovary, and base of sepals (from abaxial side) with clavate hairs; lip glabrous.......................................... 3 B. nodosum
- Pedicel and ovary, and sepals glabrous; lip hairy or papillose ...........................................................................................................5
5. Lateral sepals and lip margin sparely papillose............................................................................................................... 4 B. forrestii
- Lateral sepals verrucose; lip margin in basal half densely papillose............................................................................ 5 B. strigosum
6. Median sepal with entire margin ................................................................................................................................ 6 B. salmoneum
- Median sepal with denticulate or erose margin ..................................................................................................................................7
7. Pseudobulbs less than 1 cm apart; upper margin of stelidia dentate ..................................................................... 7 B. taeniophyllum
- Pseudobulbs spaced more than 1 cm apart; upper margin of stelidia entire.......................................................................................8
8. Median sepal broadly ovate, its margin slightly erose, at apex dentate, mucronate; petals narrowly ovate, apex with short seta, margin ciliate ............................................................................................................................................................. 8 B. truongtamii
- Median sepal ovate, dentate or erose, apex acute; petals ovate-triangular, apex acute, margin fimbriate.......................9 B. helenae
description: Published as part of Dang, Minh Quan, Averyanov, Leonid V., Dang, Van Son, Maisak, Tatiana, Bui, Van Huong, Tu, Bao Ngan & Truong, Ba Vuong, 2022, Bulbophyllum section Rhytionanthos (Orchidaceae) in Vietnam with description of new taxa and new national record, pp. 257-270 in Phytotaxa 530 (3) on page 259, DOI: 10.11646/phytotaxa.530.3.1, http://zenodo.org/record/5835973