Medinilla Species

Adorador, Jiro T., Meneses-Adorador, Zhereeleen D. & Quakenbush, J. Peter, 2021, Medinilla malabrigoi (Melastomataceae), a new species from forests over limestone in Samar Island, Philippines, Phytotaxa 483 (2), pp. 95-105 : 97-98

Key to the Medinilla Species of Samar Island

1 Leaves <8 cm long; peduncles slender (<1 mm); calyx lobes dentate and pointed inwards; petals ovate-lanceolate; anthers surrounding style, all the same color, episepalous dorsal appendages triangular ............................................ Medinilla myrtiformis

- Leaves> 8 cm long; peduncles thicker (> 1 mm); calyx truncate or lobes pointed outwards; petals obovate, often obliquely so; anthers clumped together above or below style, two colors (e.g. yellow and violet or yellow and white), all dorsal appendages spur-like.............................................................................................................................................................................................2.

2 Whole plant glabrous or nearly so (except for setose nodes and pulverulence) ...............................................................................3.

- Plant more or less pubescent, e.g. setose or stellate-tomentose, especially young branches, leaf undersurfaces, bracts, bracteoles, and hypanthia...................................................................................................................................................................................11.

3 Inflorescences mostly terminal or from leafy nodes, paniculate with whorled branching pattern throughout .................................4.

- Inflorescences cauline, variously reduced, secondary branches (if present) not in a consistently whorled pattern..........................5.

4 Stems ridged or winged; nodes generally setose; leaves sessile, large, exceeding 20 cm long; flowers large, petals exceeding 20 mm long, 5-merous; fruits> 5 mm in diameter................................................................................................... Medinilla teysmannii

- Stems terete; nodes not setose; leaves petiolate, small, not exceeding 15 cm long; flowers small, petals less than 10 mm long, 4- merous; fruits <5 mm in diameter .............................................................................................................................. Medinilla ovalis

5 Nodes generally setose; inflorescence globose or ellipsoid, headlike, gradually extending, bracts showy and persistent.................. ....................................................................................................................................................................... Medinilla cephalophora

- Nodes glabrous; inflorescence otherwise, bracts inconspicuous and deciduous...............................................................................6.

6 Leaves in whorls of four or more ......................................................................................................................................................7.

- Leaves primarily opposite, rarely ternate ..........................................................................................................................................9.

7 Leaf bases rounded to subcordate....................................................................................................................... Medinilla furfuracea

- Leaf bases acute to attenuate .............................................................................................................................................................8.

8 Stems ribbed to sulcate; young parts pulverulent; leaves lanceolate, ca. three or more times longer than wide................................. .................................................................................................................................................................................. Medinilla antonii

- Stems terete; young parts not pulverulent; leaves elliptic-obovate or oblong-lanceolate, ca. two times longer than wide................. ........................................................................................................................................................................... Medinilla quadrifolia

9 Leaf bases peltate ..................................................................................................................................................... Medinilla peltata

- Leaf bases otherwise........................................................................................................................................................................10.

10 Leaves petiolate................................................................................................................................................... Medinilla polillensis

- Leaves sessile .................................................................................................................................................... Medinilla malabrigoi

11 Smaller leaf at each node very strongly reduced (<20% as long as larger leaf)..............................................................................12.

- Smaller leaf at each node not as strongly reduced (>20% as long to nearly equal)........................................................................13.

12 Indumentum rusty brown; smaller leaf cordate, spreading away from stem; inflorescence with visible internodes, not dense and globose, few-flowered (<10); calyx shallowly lobed (<2 mm long).................................................................. Medinilla ferruginea

- Indumentum yellow-pilose; smaller leaf lanceolate, appressed against the stem; inflorescence without visible internodes, dense and globose, many-flowered (>10); calyx deeply lobed (2 mm long) .......................................................... Medinilla microcephala

13 Plant setose including bracts .......................................................................................................................... Medinilla cuernosensis

- Plant stellate-tomentose including bracts ........................................................................................................................................14.

14 Inflorescence without visible internodes, dense and globose, many-flowered (>10); calyx extended (> 2 mm) ................................. ................................................................................................................................................................................ Medinilla capitata

- Inflorescence with visible internodes, not dense and globose, few-flowered (<10); calyx short (<2 mm) ......................................... ................................................................................................................................................................................ Medinilla setigera