Rytigynia adenodonta (K.Schum.) Robyns

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation

Predicted extinction risk: not threatened. Confidence: confident

Rubiaceae, D. Bridson. Flora Zambesiaca 5:2. 1998

Morphology General Habit

Much branched shrub or small tree 1.5–3.6 m tall, entirely glabrous (save for domatia and insides of stipules), or with young shoots slightly to densely appressed pubescent; older branches greyish, ± nodulose and verrucose, the bark often red-brown and fissured and flaky.

Morphology Leaves

Leaves 1.3–6 × 0.4–2.8 cm, elliptic to broadly ovate-elliptic, abruptly shortly obtusely acuminate at the apex, ± rounded or cuneate at the base, scarcely discolorous, glabrous save for small pubescent domatia which may be ± absent or, rarely (Malawi) pubescent beneath and on midrib above; petioles 3–4 mm long; stipules connate at the base, glabrous outside, densely long-villous inside, 2 mm long, abruptly subulate-cuspidate, the appendage 1–2 mm long.

Morphology Reproductive morphology Flowers

Flowers solitary, or in lax 2–4-flowered cymes; pedicels rather thick, 3–5(11) mm long.

Morphology Reproductive morphology Flowers Calyx

Calyx tube 1.5 mm long; limb obsoletely dentate, truncate or teeth broadly triangular, 0.8 mm long.

Morphology Reproductive morphology Flowers Corolla

Corolla ± rounded to acuminate at the apex in bud; creamy-white; tube 5–6 × 3.5–5 mm obconic, dilated from the base, with a ring of deflexed long hairs inside from the top of the tube; lobes oblong, reflexed, reaching about the middle of the tube, about 3–3.5 × 2–2.5 mm, ovate, obtuse or with a short appendage to 0.5 mm long.

Morphology Reproductive morphology Flowers Gynoecium Ovary

Ovary 3–4-locular.

Morphology Reproductive morphology Flowers Pollen presenter

Pollen presenter coroniform, 1 mm wide, 3–4-lobed.

Morphology Reproductive morphology Fruits

Fruit purple-black, about 8 mm long.

Rubiaceae, B. Verdcourt. Flora of Tropical East Africa. 1976

Morphology General Habit

Much-branched shrub or small tree 1.5–3.6 m. tall, entirely glabrous (save for domatia and insides of stipules) or with young shoots slightly to densely adpressed pubescent; older branches greyish, ± nodulose and verrucose, the bark often red-brown and fissured and flaky.

Morphology Leaves

Leaf-blades elliptic to broadly ovate-elliptic, 1.3–6 cm. long, 0.4–2.8 cm. wide but usually quite small in Flora area, abruptly shortly obtusely acuminate at the apex, ± rounded or cuneate at the base, scarcely discolorous, glabrous save for small pubescent domatia which may be almost or quite absent or, rarely, in Malawi, pubescent beneath and on midrib above; petioles 3–4 mm. long; stipules connate at the base, glabrous outside, densely long-villous inside, 2 mm. long, abruptly subulate-cuspidate, the appendage 1–2 mm. long.

Morphology Reproductive morphology Flowers

Flowers solitary or in lax 2–4-flowered cymes; pedicels rather thick, 3–5(–11) mm. long.

Morphology General Buds

Buds ± rounded to acuminate at the apex.

Morphology Reproductive morphology Flowers Calyx

Calyx-tube 1.5 mm. long; limb obsoletely dentate, truncate or teeth broadly triangular, 0.8 mm. long.

Morphology Reproductive morphology Flowers Corolla

Corolla creamy white; tube obconic, dilated from the base, 5–6 mm. long 3.5–5 mm. wide, with a ring of deflexed long hairs inside from the top of the tube; lobes oblong, reflexed, reaching about the middle of the tube, ovate, ± 3–3.5 mm. long, 2–2.5 mm. wide, obtuse or with short appendage to 0.5 mm. long.

Morphology Reproductive morphology Flowers Gynoecium Pistil

Ovary 3–4-locular; stigmatic club coroniform, 1 mm. wide, 3–4-lobed.

Morphology Reproductive morphology Fruits

Fruit purple-black, ± 8 mm. long.