Monodora globiflora
Tree to 12 m tall; d.b.h. to 30 cm; bark grey with white lenticels; young branches drying black, densely covered with short erect hairs, rarely glabrous; old branches grey, striate, glabrous. Petioles 6-8 mm long, ca. 1 mm in diameter, covered with short erect hairs, leaf lamina inserted on the side, weakly grooved adaxially. Leaf lamina 12-21 cm long, 4-7 cm wide, length:width ratio 2.1-3, narrowly obovate to obovate or narrowly elliptic to elliptic, base cuneate to acute, apex acute to cuspidate, papyraceous, abaxial surface densely covered with short erect hairs when young to sparsely covered with short erect hairs when older, adaxial surface glabrous to sparsely covered with short erect hairs adaxially, rarely glabrous on both surfaces; midrib densely covered with short erect hairs on both sides; secondary veins 14-16 pairs, strongly curved upwards, parallel, covered with short appressed hairs abaxially; tertiary venation conspicuously percurrent. Flowers single, leaf opposed, pendulous. Flowering pedicels 40-45 mm long, ca. 0.5 mm in diameter, covered with short appressed hairs, light green. Upper bract inserted in lower half of pedicel, ca. 8 mm long, ca. 7 mm wide, length:width ratio ca. 1.5, ovate, base auriculate-clasping, apex rounded, glabrous, green; margins straight, densely covered with short erect hairs. Sepals 8-10 mm long, 6-8 mm wide, length:width ratio 1.3-1.5, oblong, base truncate, apex rounded, glabrous on both surfaces, reflexed upwards, light green, caducous in fruit; margins entire, densely covered with short erect hairs. Outer petals 28-32 mm long, 18-23 mm wide, length:width ratio 1.4-1.8, ovate, apex rounded, slightly reflexed and curved inwards at apex when fully opened, glabrous but sparsely covered with short appressed hairs along the veins, creamy yellow streaked with red slashes and spots; margins undulate, glabrous to sparsely covered with short erect hairs. Inner petals 7-8 mm long, 10-12 mm wide, length:width ratio 0.7-1, clawed triangular, base truncate, apex acuminate to rounded, covered with ca. 1 mm long curly hairs becoming shorter towards margins, the whole lamina connivent over receptacle like a globe, bright yellow with red streaks; claw 3-5 mm long, 2-4 mm wide, claw:inner petal ratio ca. 1.5-2.5, glabrous, bright yellow without red streaks. Receptacle 4-5 mm in diameter, flat. Stamens in 5-6 rows, ca. 0.8 mm long, connective shield ca. 0.1 mm long, glabrous, white, those of innermost row not extended over ovary wall. Ovary ca. 1.5 mm long, ca. 1 mm wide; stigma ca. 1 mm diameter, glabrous, white. Fruiting pedicels ca. 4 cm long, 3-4 mm in diameter. Fruits 4-5 cm long, ca. 5 cm in diameter, irregularly globose, surface reticulate, glabrous, green-reticulate; pericarp ca. 2 mm thick. Seeds 13-15 mm long, 7-8 mm wide, transversely elliptic, in white pulp; testa smooth, light brown; raphe not thickened, brown; hilum not seen.
Monodora globiflora is characterized by a clear percurrent tertiary venation, which is unique in Monodora, hairy leaves, and an inner petal that is longer than the claw. The species has been photographed by Mr. Quentin Luke which shows a strong color variation. The specimen Luke 9178 has green to yellow inner and outer petals with white streaks, while Luke 9136 has yellow inner and outer petals with red streaks. This variation in color needs further investigation in the field.
EN B1ab(iii) + 2ab(iii). Monodora globiflora is represented by eight collections all from the Udzungwa Mountains National Park. With an extent of occurrence of 1000 km2 and an area of occupancy of 70 km2, the category “endangered” seems appropriate.
Molecular data indicate that there is strong support for this species being sister to M. carolinae and M. stenopetala.
Eastern Arc Mountains, Tanzania; montane rain forest, on well drained brown sandy loams with extensive areas of rock faces; at 1700-2000 m altitude.