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Angraecum section Acaulia Garay, Kew Bull. 28: 495–516 (1973).
Description:
Epiphytic plants, small, stemless; leaves 2-6, distinctly lanceolate-ovate, constricted at the base, 23 x 5 mm; inflorescences 16 mm long, 1-flowered (a second aborted when present), equaling or exceeding leaves; flowers small, pale green, petals and sepals linear-lanceolate 0.6 x 7.5 mm, dorsal sepal slightly longer; labellum uppermost 6 x 3 mm, base expanded and very rounded, apex acuminate; spur funnel-shaped and tapering below, often expanding a little at the apex, at least twice longer than labellum, ca. 25 mm long; ovary round in section with 360° resupination.
Garay (1973) proposed this section to accommodate a group of plants with very short stems bearing few basal leaves. The inflorescences are usually single-flowered or may bear more than one flower successively.
Habitat:
At low altitudes, usually on small trees or twigs (1 to 2 m from the ground), frequent in secondary forests.
It seems unlikely that any of these species is in cultivation.
Type:
Angraecum rhynchoglossum Schltr.
Species:

World Checklist of Monocotyledons.The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/monocots/ accessed13/02/2017