Key to sections of genus Angraecum

1	Inflorescence one-flowered or at most 2-flowered, he flowers procuded either simultaneously or in succession	2
	Inflorescence several- to many-flowered, racemose or paniculate,rarely through arrested development only with one mature flower	10
2	Plants sessile, with very much reduced stem or stemless; leaves few, all basal	Acaulia
	Plants erect with distinct stem; leaves several to many, all cauline	3
3	Ovary sessile, i.e. without a pedicel; peduncle very short, hardly developed	4
	Ovary pedicellate; peduncle more or less distinctly evolve	5
4	Leaves very short, laterally compressed, densely imbricate	Dolabrifolia
	Leaves elongate with a distinct blade, or linear, never compressed laterally, more or less laxly distichous	Pectinaria
	Peduncle covered entirely with 3 or 4, laterally compressed sheaths; flowers rather large and conspicuous; ovary often triquetrous	Perrierangraecum
	Peduncle covered only at the base with I or 2, adpressed, but not compressed sheaths; flowers as a rule rather small or rarely medium sized; ovary terete	6
6	Peduncle quite short, normally shorter than the internodes, very rarelyas long	7
	Peduncle prominent, slender, normally much longer than the internodes	8
7	Spur of lip as long as the ovary or commonly shorter, very rarely some what surpassing it	Conchoglossum
	Spur of lip many times longer than the ovary	Filangis
8	Flowers small; spur cylindric or clavate	Angraecoides
	Flowers medium sized or larger; spur filiform, elongate	9
9	Lip rather narrow	Pseudojumellea
	Lip rather broad (flowers often produced in succession)	Arachnangraecum
10	Flowers thin in texture, subdiaphanous	11
	Flowers fleshy in texture	15
11	Stem more or less distinctly produced, occasionally very prominent	12
	Stem not obvious, usually none	14
12	Stem short or rarely somewhat elongate, leafy above; inflorescences borne in the lower leaf axils peduncle setiform, commonly elongate, loosely or more or less loosely few-flowered	Gomphocentrum
	Stem prominently elongate, leafy throughout; inflorescences borne from the axils of the upper	13
13	Inflorescence many-flowered, as long as or commonly longer than the leaves; rachis somewhat flexuous	Lepervenchea
	Inflorescence few-flowered, commonly, through arrested development,1- to 3-flowered, shorter than the leaves; rachis hardly flexuous	Lemurangis
14	Flowers minute, often forming a dense raceme, normally one-sided	Nana
	Flowers small to medium-sized, more or less loosely racemose, all roundthe rachis	Boryangraecum
15	Stem not obvious, usually none	16
	Stem very prominent	18
16	Spur with a narrow opening; ovary rather long pedicellate	Chlorangraecum
	Spur with a wide opening; ovary commonly short pedicellate	17
17	Spur conical or saccate, obtuse and short	Hadrangis
	Spur filiform, rather elongated	Humblotiangraecum
18	Inflorescence elongate, several-flowered, but usually appearing one at a time (either due to arrested development or their intervallate nature)	Afrangraecum
	Inflorescence elongate, always several-flowered	Angraecum

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