Table 1 in Cladoceras rovumense sp. nov. (Gentianales-Rubiaceae), a new species from southeast Tanzania and northeast Mozambique

Table 1. The main morphological differences between Cladoceras subcapitatum (K.Schum. & K.Krause) Bremek. and C. rovumense I.Darbysh., J.E.Burrows & Q.Luke sp. nov.
CharacterCladoceras subcapitatumCladoceras rovumense sp. nov.HabitScandent shrub with some lateral branches modified to form ± recurved spinesFree-standing tree or shrub, lacking modified spinose lateral branchesLeaf shape and dimensionsElliptic to oblong-oblanceolate 3.5–12 × 0.9–4.8 cm Length / width ratio 1.85–4: 1, usually>2: 1Obovate or obovate-elliptic 9–17.5 × 5.8–10.5 cm Length / width ratio 1.55–1.9: 1Leaf indumentumGlabrousPubescent particularly on veins beneath and midrib above, becoming scabridulous at maturityInflorescence positionBorne on lateral branches with one or more pairs of leaves at least at flowering stage, sometimes caducous at fruitingBorne on leafless lateral branchesInflorescence formSubcapitate but usually with some clear branching, 9–15-floweredDense, capitate, usually with branching suppressed, with 20+ flowersCalyx lobesAcute-triangular to -lanceolate, without toothed marginRounded to broadly and convexly triangular, with an irregular, sometimes toothed marginCorolla tube length25–35 mm(30–)38–42 mmAnther length2–2.5 mm2.6–3 mmCombined length of style + stigma8–10 mm17–19 mm