| 1 | Leaves trifoliolate, laterals sometimes caducous, leaving a scar. Mature fruit greenish yellow when fresh (red when dry!); more than 1½ cm long. |
| 1' | Leaves unifoliolate; no lateral scars. Mature fruit red when fresh; less than 1½ cm long. |
| 2 | Calyx 3-5 mm high, outside pale puberulous to glabrous, not persistent in fruit. |
| 2' | Calyx 2½-3 mm high, outside brown puberulous, persistent in fruit. |
| 3 | Mature leaf puberulous to pubescent beneath, also between the nerves. |
| 3' | Mature leaf beneath at most sparsely puberulous on the nerves. |
| 4 | Panicles not or barely exceeding the leaves. Petals 4-7 mm long. Rimae obscure, glabrous inside. |
| 4' | Panicles exceeding the leaves. Calyx 3-3½ mm high. Petals 6-8 mm long. Rimae conspicuous, lighter and minutely papillose inside. |
| 5 | Leaves 8-23 by 3-8½ cm, margins never paler. Calyx 1¼-2 mm high. |
| 5' | Leaves 5-11¼ by 2-3½ cm, margins usually paler. Calyx 2-3¾ mm high. |
| 6 | Calyx (and often panicle also) glabrous to finely pale puberulous. Rimae obscure and glabrous inside. |
| 6' | Calyx at least at the base (and panicle) rusty puberulous. Rimae conspicuous, inside lighter and minutely papillose. |
| 7 | Panicle glabrous, stout. Cymes sessile, flowers in glomerules along the rachis. |
| 7' | Panicle puberulous, slender. Cymes stalked. |
| 8 | Leaves 4-13½ cm long. Panicle up to 13 cm, erect, ± compact (lax in S. celebica). |
| 8' | Leaves 7½-28½ cm long. Panicle usually pendulous, slender, usually much longer than 13 cm. |
| 9 | Cymes not ± secund. Basal parts of pedicels all ± equal. |
| 9' | Cymes ± secundly branched. Basal part of one pedicel per cyme usually elongated, up to 5 mm. Nerves of leaf beneath often reddish when dry. |
| 10 | Leaves when dry brown to reddish brown. Basal parts of pedicels 0-2 mm long. Calyx 1¾-2¼ mm high, persistently puberulous outside, reddish brown when dry. |
| 10' | Leaves when dry palish to olive green, 4½-11 cm long, acuminate. Basal part of pedicels 2-6 mm long. Calyx 2-3 mm high, outside glabrescent in fruit, except for base and margins, crimson when dry. |
| 11 | Leaves 4-10 cm long, acuminate to cuspidate. Panicle ± dense, pedicels with shorter and reduced upper joint (c.⅓ mm). |
| 11' | Leaves 6-13½ cm long, cuneate-acute to faintly acuminate; venation above more prominent than in the other two species. Panicle slender, lax, joints of pedicel ± equal (up to 1½ mm). |
| 12 | Leaf widest at the middle, apex gradually acute to caudate, base obtuse to rounded. Nerves often reddish when dry. Petiolules 2-4 by 1-2 mm. Cymes ± secundly branched, basal part of one pedicel elongated, up to 5 mm. Claw of petals ⅔-1 mm long. |
| 12' | Leaf widest at or above the middle, margins ± parallel, apex abruptly acuminate to caudate, base truncate to emarginate. Nerves concolourous with intervenium when dry. Petiolules 3-9 by 1-3 mm. Cymes not ± secundly branched, basal part of pedicels ± equal. Claw of petal ¼-½ mm long. |
