Campylocentrum sect. Campylocentrum Cogniaux (1906: 504)

Pessoa, Edlley & Alves, Marccus, 2018, Taxonomical revision of Campylocentrum sect. Campylocentrum (Orchidaceae, Vandeae, Angraecinae) in Brazil, Phytotaxa 362 (1), pp. 1-20 : 2-3

Campylocentrum sect. Campylocentrum Cogniaux (1906: 504) . 1906.

Type species: Campylocentrum schiedei (Rchb. f.) Benth. ex Hemsl.

Epiphytic herbs, pendent or erect. Roots cylindrical or dorso-ventrally flattened, fibrous, smooth, greenish, whitish, or dark grey. Stem cylindrical. Leaves pale to dark green, elliptical, oblanceolate, oblong to oblong-elliptical, sub-falcate, the apex asymmetrically 2-lobed, lobes acute, obtuse or rounded, margin entire. Inflorescences congest or lax, peduncle glabrous, hirtellous, minutely papillosepapillose to papillose, brownish, rachis glabrous, hirtellous, minutely papillose to papillose, brownish; floral bracts deltoid to lanceolate, margin entire to minutely denticulate, membranaceous, the apex acute to acuminate. Flowers cream colored, pale orange, whitish, white-greenish or yellowish, distichous, pedicellate ovary glabrous, densely hirtellous to minutely papillose; dorsal sepal elliptical, oblong, oblong-elliptical, oblong-lanceolate to oblong-ovate, adaxially sparsely pilose or glabrous, 1–3-nerved, margin entire, membranaceous, the apex acute, obtuse or rounded; lateral sepals oblong, oblong-elliptical to oblong-lanceolate, subfalcate, adaxially sparsely pilose or glabrous, 1–3-nerved, margin entire, membranaceous, the apex acute, obtuse or rounded; petals elliptical-lanceolate, oblong to oblong-elliptical, adaxially pilose or glabrous, 1–3-nerved, margin entire, membranaceous, the apex acute, obtuse, or rounded; lip entire ovate or 3-lobed, 5–9-nerved, margin entire, membranaceous, producing a spur at base, lateral lobes oblanceolate, oblong to ovate, the apex obtuse, rounded to truncate, mid-lobe deltoid to lanceolate, the apex acute, spur clavate, cylindrical, cylindrical-clavate, ellipsoid or ovoid, curved, inflexed, patent, sigmoid, slightly curved or straight, pale green, pale orange or yellowish, glabrous to sparsely pilose, the apex acute, attenuate or rounded; gynostemium reduced, anther cap apex 2-lobed, pollinia 2, globose. Capsules fusiform, 6-ribbed, densely hirtellous, glabrous or minutely papillose, pedicellate. (Table 1)

The section is represented in Brazil by ten species, of which four are endemic to the Atlantic Forest, and six grow in Amazon forest. C. micranthum ( Lindley 1835: t. 1772) Maury (1889: 273) is the only species with a disjunct distribution between both forests. These plants grow commonly in the moist environments of the sub-canopy.

Table 1. Main morphological features of the species of section Campylocentrum in Brazil.