Conostegia apiculata Wurdack

Kriebel, Ricardo, 2016, A Monograph of Conostegia (Melastomataceae, Miconieae), PhytoKeys 67, pp. 1-326: 117-119

publication ID

http://dx.doi.org/10.3897/phytokeys.67.6703

persistent identifier

http://treatment.plazi.org/id/4240C1B3-43A5-065B-2DA0-FC24DE2CB678

treatment provided by

PhytoKeys by Pensoft

scientific name

Conostegia apiculata Wurdack
status

 

Conostegia apiculata Wurdack   Fig. 114 View Figure 114

Conostegia apiculata   Wurdack, Brittonia 9: 103. 1957. Type: Colombia. Nariño: Curcuele, just above San Miguel, 8 km below Piedrancha, valley of Rio Guabo, 1550 m, 1 October 1943, F. Fosberg 21084 (holotype: US!, isotype: NY!).

Description.

Small tree to 7 m tall (one label had this information) with tetragonal and ridged young stems that are covered with a rusty indument of sessile stellate trichomes intermixed with dendritic trichomes which have a thick axis and appear stipitate stellate; nodal line absent and/or covered by indument. Leaves equal or unequal at each node. Petiole 0.8-3.5 cm. Leaf blades 8-22 × 2.-8 cm, 3-5-plinerved, with the innermost pair of veins arising just above the blade base or up to 1 cm above the base in opposite to alternate fashion, narrowly elliptic to elliptic, the base acute, the apex acuminate to caudate, entire to inconspicuously denticulate, glabrous adaxially, with small stellate trichomes and branched trichomes mostly on the veins abaxially. Inflorescence a terminal panicle 4-11 cm long, accessory branches absent, branches rusty from the indumenta like the stems, bracteoles linear to lanceolate, 3-10 mm long, persisting but ultimately deciduous. Flowers mostly 6 merous, calyptrate. Flower buds (7.5-) 10-18 × 4-8 mm, slightly constricted in the middle, flattened at the base and apiculate at the apex, the calycine and hypanthial portions weakly differentiated, the hypanthium 4.5-6.25 × 5-6.5 mm, covered with stellate hairs. Petals 8-11 × 6-8.8 mm, white, obovate to obovate-spatulate, emarginate, and glabrous. Stamens 18-24, ca 6-8 mm long, the filament 3-4.5 mm long, white, without an abrupt geniculation but curving below the anthers, anthers 3-3.5 × 0.5-0.7 mm, linear, slightly recurved, the anther connective thickened but without an evident shoulder, yellow, the pore ca. 0.14 mm wide. Ovary mostly 6 locular, glabrous, inferior and elevated into a small collar around the style base. Style ca. 7.5-11 mm, vertical distance from the anther to the stigma ca. 4 mm, horizontal distance absent; stigma capitate, 1.4-1.6 mm wide. Berry not seen.

Distribution

(Fig. 115 View Figure 115 ). Known from few collections in the Pacific coast of Colombia to Central Ecuador, 600-1800 m in elevation.

This rare species can be recognized based on its indument of stellate hairs, long apiculate calyptras, and stout, exserted styles. The drawing made by Wurdack deposited at NY shows the lack of a filament geniculation in this species. Floral measurements made of an Ecuadorian specimen (Toasa et al. 11350 - NY) show longer styles at least in that population than in Wurdack’s drawing.

Specimens examined.

COLOMBIA. Chocó: Alrededores de Noanama , Forero et al. 4568 ( COL, MO)   . Nariño: Ricuarte, Reserva Natural La Planada , Agudelo et al. 2963 ( COL)   .

ECUADOR. Imbabura: Brillasol, Toasa et al. 11350 ( NY).

Kingdom

Plantae

Phylum

Tracheophyta

Class

Magnoliopsida

Order

Myrtales

Family

Melastomataceae

Genus

Conostegia

Loc

Conostegia apiculata Wurdack

Kriebel, Ricardo 2016
2016
Loc

Conostegia apiculata

Wurdack 1957
1957