Table 1 in Impatiens smetsiana, another example of convergent evolution of flower morphology in Impatiens

Table 1. Comparison of taxonomic useful characters of the species closely related to I. smetsiana and the morphologically similar I. erecticornis. Size indicates both measurements for length and width, respectively. I. erecticornisI. filicornuI. smetsianaI. kamerunensis subsp. kamerunensisI. kamerunensis subsp. obanensisI. nzabianaHeight (cm)40-1503540-604050-60 (100)40Leaf arrangementspirallyspirallyspirallyopposite-suboppositespirallyspirallyPetiole length(cm)1.2-7.52.5-62-6.30.5-40.5-41.2-2.5Leaf size (cm)5.4-14.3 × 2.4-7.03.2-8.5 × 1-57.5-11 × 3.7-4.52.8-10 × 1.6-3.84.3-14 × 2.2-7.03-5 × 0.9-1.3Leaf shapeovateovate-narrowly ovate (elliptic)ellipticovate, oblong-narrowly ovateovate, oblong-narrowly ovatenarrowly ovate-rhombic to narrowly ellipticLeaf apexacuminateacute to shortly acuminateacuminateacute to acuminateacute to acuminateacuminateLeaf basecuneate- attenuateattenuate-roundedattenuaterounded-shortly attenuaterounded-shortly attenuatecuneateLateral veins7-10 pairs4-5(-6) pairs5-7 pairs4-9 pairs4-9 pairs6-8 pairsLeaf margincrenateshallowly crenatecrenateshallowly crenate to crenate-serrateshallowly crenate to crenate-serratefinely crenate-serrateFimbriaepresentpresentabsentoften presentoften presentpresentInflorescence3-6 flowered subumbellate raceme4-9 flowered subumbellate raceme6-many flowered subumbellate racemelax 6-many flowered axillary or pseudo-terminal racemelax 6-many flowered axillary or pseudo-terminal racemelax axillary racemesFlower colourpinkpink-purplishpinkpink-purplishpink-purplishpinkPeduncle length (cm)3-9.58-145.5-145.5-165.8-2611-12Bract size (mm)5-8 × 4-63-6 × 3-45-6 × 4-52-4.52-4.51Bract shapeovateovateovateovate lanceolate to linear lanceolateovate lanceolate to linear lanceolatelinear lanceolateLateral sepal length (mm)6-73-43.8-4.52.5-42.5-41.2Lateral sepal shapeovateovateovateovate lanceolate to linear lanceolateovate lanceolate to linear lanceolatenarrowly and obliquely navicularLower sepal length (mm)9-1158-93-64-97-8Spur length (mm)23-2810-3523 - 3513-3035-5522.5-25Spur shapecurved filiformcurved filiformcurved filiformcurved filiformcurved filiformcurved and flattened filiformDorsal petal size (mm)6-8 × 4-64.4 × 4.010.5 × 9.53-13 × 3-103-13 × 3-105-6 × 7-8Dorsal petal shapecucullateoblongoblong-shallowly cucullateoblong-suborbicularoblong-suborbicularsuborbicularLateral united petals length (mm)24-3510-1619-2112-1516-2016.5-18.0Upper lateral petal size (mm)13-19 × 7-118 × 2-312-13 × 8-97-13 × 3-107-13 × 3-1012.0-13.5 × 5Upper lateral petal shapeoval-kidney shapednarrowly oblong-ellipticoval-kidney shapedtransversely and broadly oblong to ± kidney shapedtransversely and broadly oblong to ± kidney shapednarrowly oblongLower lateral petal size (mm)15-27 × 8-138-10 × 6-815.5-16.5 × 12.5-133-10 × 5.5-133-10 × 5.5-1314.5-15.0 × 8.0-8.5Lower lateral petal shapeasymmetrically obovatesuborbicular-oblongasymmetrically obovatesuborbicular to obliquely oblongsuborbicular to obliquely oblongsuborbicularSize ligulate appendage of lower lateral petal (mm)not applicable3-5 × 1-24-4.5 × 2.5-4.13-7 × 1-2.53-7 × 1-2.57.0-7.5 × 2.5-3.0Fruit length (mm)9-1513-5 mmunknown9-179-176.5