Dissochaeta conica (Bakh .f.) Clausing in S.S.Renner et al., Fl. Thailand 7(3): 423. 2001.,

Kartonegoro, Abdulrokhman, Veldkamp, Jan Frits, Hovenkamp, Peter & Welzen, Peter van, 2018, A revision of Dissochaeta (Melastomataceae, Dissochaeteae), PhytoKeys 107, pp. 1-178: 1

publication ID

http://dx.doi.org/10.3897/phytokeys.107.26548

persistent identifier

http://treatment.plazi.org/id/F86A4083-73ED-435A-5A8C-409BEE5E7A11

treatment provided by

PhytoKeys by Pensoft

scientific name

Dissochaeta conica (Bakh .f.) Clausing in S.S.Renner et al., Fl. Thailand 7(3): 423. 2001.
status

 

14. Dissochaeta conica (Bakh .f.) Clausing in S.S.Renner et al., Fl. Thailand 7(3): 423. 2001.  Fig. 11View Figure 11, Map 10View Map 10

Diplectria conica  Bakh. f., Contr. Melastom.: 202. 1943.

Anplectrum crassinodum  Merr., Pap. Michigan Acad. Sci. 24: 85. 1939, nom. illeg., non Merr. 1929. Type: Indonesia. North Sumatra: Asahan, Near Loemban Ria, 5-12 Apr 1934, Rahmat si Boeea 7781 (lectotype, designated by Veldkamp et al. 1979, pg. 414: MICH [MICH-1111809, image seen]!; isolectotypes: L [L0008856]!), S [SG-439, image seen]!).

Type.

Indonesia. West Sumatra: Agam, Brani, 950 m elev., 19 Jun 1918, H.A.B. Bünnemeijer 3094 (holotype: L [L0537295]!; isotypes: BO [BO1865987, BO1865988]!, L [L0537294]!).

Description.

Climbing up to 4 m in height. Branchlets terete, 4-5 mm in diameter, glabrous; nodes swollen, with raised interpetiolar ridge; internodes 4-6.5 cm long. Leaves: petioles terete, 5-10 mm long, glabrous; blades ovate to ovate-elliptic, 10-16 × 4.5-6.5 cm, subcoriaceous, base rounded, margin entire, apex acuminate, tip 0.5-1 cm long; nervation with 1 pair of lateral nerves and 1 pair of intramarginal nerves; surfaces glabrous. Inflorescences terminal and axillary, when terminal, up to 20 cm long and many-flowered, when axillary, up to 10 cm long and with 3-10 flowers; main axis angular, glabrous; primary axes up to 16 cm long with 4 or 5 nodes, secondary axes 1.5-4 cm long with 1-3 nodes, tertiary axes up to 1.5 cm long with 1 node; bracts linear, 2-4 mm long, glabrous, caducous; bracteoles linear, 1-2 mm long, glabrous; pedicels glabrous, 5-8 mm long in central flowers, 4-5 mm long in lateral flowers. Hypanthium cyathiform-tubular, cup-shaped, 7-8 × ca. 5 mm, glabrous; calyx lobes truncate, 1-2 mm long, without distinct tips or with irregularly cracked or rounded tips; petal bud conical, 5-6 mm long; mature petals ovate, 7-8 × ca. 6 mm, reflexed, white or pale purple, base clawed, apex acute. Stamens 8, unequal, filaments straight; alternipetalous stamens staminodial, with ca. 4 mm long filaments, thecae rudimentary, slender, terete, sinuate, ca. 6 mm long, basal crest oblong to triangular, ca. 1 mm long, acute at tip, thin, lateral appendages paired, ligular, ca. 1 mm long; oppositipetalous stamens with 6-7 mm long filaments, anthers thick, curved, S-shaped, thecae 9-10 mm long, connective crest bifid, erose, ca. 0.75 mm long, basal appendages paired, spur-like, ca. 1 mm long, erect. Ovary half as long as hypanthium, apex glabrous; style curved at the end, slender, ca. 15 mm long, glabrous; stigma minute, papillose; extra-ovarial chambers 4, oppositipetalous, extending almost to the base of the ovary. Fruits subglobose to urceolate, 7-8 × 5-6 mm, glabrous; calyx lobes remnant persistent, erect. Seeds ca. 0.5 mm long.

Distribution.

Peninsular Malaysia, Sumatra and Java (West).

Ecology and habitat.

Low montane forest in open places at 600-950 m elevation.

Specimens examined.

MALAYSIA. Selangor: Ulu Gombak, 15 Jun 1967, J.C. Carrick 1569 (K, L). INDONESIA. North Sumatra: Asahan, Lumban Ria, Rahmat Si Boeea 7781 (L, MICH, S); Tapanuli Selatan, Batang Toru, Telek Nauli, 885 m, 25 Mar 2004, W. Takeuchi et al. 18794 (L). West Sumatra: Agam, Brani, 950 m, 19 Jun 1918, H.A.B. Bünnemeijer 3094 (BO, L); Lima Puluh Kota, Harau Valley, Sarasah Bonta, 500 m, 11 Sep 2017, A. Kartonegoro 1078 (BO, L); Ibid., Kelok Sembilan, 800 m, 13 Sep 2017, A. Kartonegoro 1101 (BO, L). West Java: Bogor, Nanggung, Mt. Menapa, 600 m, 18 Dec 1940, C.G.G.J. van Steenis 17412 (BO, K, L).

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Myrtales

Family

Melastomataceae

Genus

Dissochaeta

Loc

Dissochaeta conica (Bakh .f.) Clausing in S.S.Renner et al., Fl. Thailand 7(3): 423. 2001.

Kartonegoro, Abdulrokhman, Veldkamp, Jan Frits, Hovenkamp, Peter & Welzen, Peter van 2018
2018
Loc

Diplectria conica

Bakh fil 1943
1943