Ancistrorhynchus tenuicaulis Summerh.

Species

Angiosperms > Asparagales > Orchidaceae > Ancistrorhynchus

Characteristics

An epiphyte ascending or arcuate with stems 2–16 cm. long, 2 mm. in diameter.. Roots few-branched, 1–2 mm. in diameter.. Leaves linear, unequally bilobed at the apex, 2–7.2 cm. long, 0.4–0.5 cm. wide, each lobe subacute or obscurely 2-toothed, articulated to imbricate longitudinally rugulose leaf-bases.. Inflorescences capitate, 4–5 mm. long, densely many-flowered; bracts elliptic, obtuse, 2–3 mm. long.. Flowers white; pedicels and ovary ± 3 mm. long.. Dorsal sepal oblong-elliptic, obtuse or rounded, 1.5–3.5 mm. long, 0.9–1.3 mm. wide; lateral sepals obliquely elliptic-oblong, obtuse, 2–3.5 mm. long, 1–1.2 mm. wide.. Petals elliptic, rounded, 1.7–3 mm. long, 0.7–1.4 mm. wide.. Lip concave, ovate or broadly ovate, obtuse, 1.4–2.5 mm. long, 1.4–2.4 mm. wide.. Spur globose to shortly clavate, 1–2.1 mm. long.. Column 0.6–0.7 mm. long; stipites 2, subspathulate; viscidium ligulate.
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Small, slender epiphytic herb; stem up to 16 cm long, the lower part covered with brown, sheathing leaf bases; roots c. 2 mm in diameter, arising at the base.
Lip 1.8–2.6 × 1.6–3 mm, oblong to ± orbicular, concave, entire; spur 1.5–2.3 × 1.5–2.3, saccate, slightly flattened dorso-ventrally.
Inflorescences borne in axils of leaf bases and lower leaves, on underside of stem, densely several-flowered on a short peduncle.
Sepals and petals oblong, obtuse; sepals 2–3.3 × 1–1.7 mm, petals very slightly smaller.
Leaves 5–9, 3–7 cm × 4–9 mm, linear to ligulate, unequally 2-lobed at the apex.
Column short and stout, less than 1 mm long; stipites 2, subspathulate.
Flowers white, bell-shaped, the anther cap with a green mark.
Bracts 3 × 3 mm, ovate, brownish.
Ovary and pedicel 3 mm long.
Life form perennial
Growth form herb
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Sexuality hermaphrodite
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Environment

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Hardiness (USDA) 9-12

Usage

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Cultivation

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Distribution

Ancistrorhynchus tenuicaulis world distribution map, present in Gabon, Rwanda, Tanzania, United Republic of, and Uganda

Conservation status

Ancistrorhynchus tenuicaulis threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:615812-1
WFO ID wfo-0000970803
COL ID DMVH
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Ancistrorhynchus tenuicaulis