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Cleisostoma firmulum

Cleisostoma firmulum

Cleisostoma firmulum Rchb.f., Bot. Centralbl. 28 (1886) 344

Type: Beccari s.n. (holo FI)

Synonyms:

  • Pomatocalpa firmulum (Rchb.f.) J.J.Sm., Natuurk. Tijdschr. Ned.-Indië 72 (1912) 104
  • Sarcanthus bicornis J.J.Sm., Bull. Dép. Agric. Indes Néerl. 19 (1908) 35
    - Type: Versteeg 1077 (syn BO; iso L); Bogor cult. (Exp. Lorenz (Djibdja 843)) s.n. (syn BO 2x)
  • Cleisostoma bicorne (J.J.Sm.) Garay, Bot. Mus. Leafl. 23, 4 (1972) 169
  • Sarcanthus decurvicalcar J.J.Sm., Nova Guinea 14 (1929) 496, pl. 83, f. 135 ?
    - Type: Feuilletau de Bruyn 456 (holo L)

Stems hanging down, rooting, branching, flexuose, 45 cm long, internodes 2-3 cm long. Leaves patent, linear, 10-15 by 0.7-0.9 cm, at the apex obliquely obtuse and minute crenulate-erose or conduplicate-acute, often laterally compressed-mucronate, mid-vein grooved above, convex below; leaf-sheathes slightly surpassing the internodes, tubular, longitudinally and transversely rugose. Inflorescences perforating the sheaths in the basal part, solitary or two next to each other, widely patent, sparsely branched, laxly many-flowered, 12-20 cm long, peduncle 3.5-6 cm long, with a few rather large, 0.4-0.65 cm long scales, rachis flexuose, angular. Floral bracts appressed, triangular, very sharply acuminate, concave, 0.15-0.2 cm long. Flowers 0.7 cm across, sepals and petals widely patent. Median sepal erect, broadly oblong, acute, concave, 3-nerved, 0.37 cm long, almost 0.2 cm wide. Lateral sepals divergent, recurved, obliquely elliptic, 0.4 by 0.2 cm, slightly falcate, acute, mid-vein outside towards the apex thickened. Petals narrowly oblong, above the base slightly constricted, obtuse, convex, 1-nerved, 0.35 by 0.1 cm. Lip adnate to the base of the column-foot, distant from the column, spurred, 3-lobed, 0.57 cm long; spur parallel with the ovary, pointing backward, conical, obtuse, inside without septum, in front with a transverse, erect, retuse lamella, at the back in the throat with a carnose callus having on either side an acute horn-like process, 0.25 cm long; lateral lobes parallel, porrect, vertical, oblong-triangular, at the apex obtuse and slightly incurved, 0.25 cm long, at the base 0.15 cm wide; mid-lobe porrect, straight, longer than the lateral lobes, triangular, truncate, channelled above, 0.3 cm long. Column rather long, truncate, at the base prolonged, 0.2 cm long. Anther transversely elliptic, 2-celled, triangular-acuminate. Pollinia 4, semiglobose, united into two globose bodies, stipe linear, viscidium elliptic. Rostellum minute. Stigma very small. Ovary with pedicel 6-grooved, 0.5 cm long. (After Smith, 1909, as Sarcanthus bicornis J.J.Sm.).


Sepals and petals pure white with two longitudinal pale violet stripes. Lip white, mid-lobe and frontal half of the lateral lobes violet, spur white. Column and anther white, pollinia yellow, stipe white.

Epiphyte in lowland and hill forest in exposed positions. Altitude 200-1100 m.

Malesia (New Guinea), ?Solomon Islands.

Papua (Indonesia); Papua New Guinea. See map

distribution in New Guinea

Warm to intermediate growing epiphyte, keep in light position.

January, February, April, May, June, July, September, October, December.

  • Family Orchidaceae
  • Subfamily Epidendroideae
  • Tribe Vandeae
  • Subtribe Aeridinae
  • Genus Cleisostoma
  • Species Cleisostoma firmulum
  • Smith, J.J., Nova Guinea 8, 1 (1909) 123, t. 42, fig. 139, as Sarcanthus bicornis J.J.Sm.
  • Schlechter, R., Repert. Spec. Nov. Regni Veg. Beih. 1 (1913) 990, as Sarcanthus bicornis J.J.Sm.
  • Smith, J.J., Nova Guinea 12, 1 (1913) 104, as Sarcanthus bicornis J.J.Sm.
  • Smith, J.J., Nova Guinea 12, 3 (1916) 462, as Sarcanthus bicornis J.J.Sm.
  • Lewis, B.A. & P.J. Cribb, Orchids of the Solomon Islands and Bougainville (1991) 283
  • O'Byrne, P., Lowland Orchid. Papua New Guinea (1994) 492, fig., as Cleisostoma bicorne (J.J.Sm.) Garay

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Cleisostoma firmulum

overview picture

Cleisostoma firmulum

Cleisostoma firmulum Rchb.f., stem with inflorescence, photo E.F. de Vogel, from Leiden cult. 20031100

Cleisostoma firmulum

Cleisostoma firmulum Rchb.f., flowers, photo J. Meijvogel, Leiden cult. 31994

Cleisostoma firmulum

Cleisostoma firmulum Rchb.f., flower, oblique front view, photo E.F. de Vogel, from Leiden cult. 20031100

Cleisostoma firmulum

Cleisostoma firmulum Rchb.f., flower, lateral view, photo E.F. de Vogel, from Leiden cult. 20031100

Cleisostoma firmulum

Cleisostoma firmulum Rchb.f., drawing N.H.S. Howcroft 170, from Dampit R., Lae

Cleisostoma firmulum

Sarcanthus bicornis J.J.Sm., drawing J.J. Smith, from collection not recorded

Cleisostoma firmulum

Sarcanthus bicornis J.J.Sm., drawing J.J. Smith, from Versteeg 1077

Cleisostoma firmulum

Sarcanthus decurvicalcar J.J.Sm., drawing J.J. Smith, from Feuilletau de Bruyn 456

Cleisostoma firmulum

Cleisostoma bicorne (J.J.Sm.) Garay, herbarium sheet, Versteeg 1077, isosyntype specimen (L)

Cleisostoma firmulum

Sarcanthus bicornis J.J.Sm., herbarium sheet, Bogor cult. s.n. (Exp. Lorentz, Djibdja 843), syntype specimen (BO)