Table 1.

Measured characters. Characters that were measured for R. delavayi, R. irroratum and intermediates. ‘Repeated’ indicates whether several measurements were taken for a single individual (yes = 10 measurements taken per individual).

	Character	Description	Levels/metric unit	Repeated
Quantitative characters
1	Leaf length	Length of the leaf blade	cm	Yes
2	Leaf width	Width of the leaf blade at the widest point	mm	Yes
3	Distance apex-mid	Distance leaf-apex to widest point of leaf	mm	Yes
4	Petiole length	Length of the petiole	mm	Yes
5*	Flowers in inflorescence	Number of flowers in inflorescence	number (count)	Yes
6	Corolla width	Width of corolla at top of tube	cm	Yes
7	Corolla length	Total length of the corolla	cm	Yes
8	Distance anther-stigma	Distance top of anther to top of stigma	cm	Yes
9	Style length	Top of ovary to top of stigma	cm	Yes
10	Style hair-cover	Length of style showing hairs	mm	Yes
11a	Stigma width	Stigma width at widest point	mm	Yes
Qualitative characters
12a	Bark	Structure of the bark (ridged)	Smooth, intermediate, deep	No
13*	Indumentum	Hairs on the lower leaf surface	Glabrous, intermediate, thick	No
14*	Corolla colour	Colour of the petals	Cream, pink, pink-red, deep-red	No
15*	Nectar pouches	Size and colour of nectar pouches	Equal, different, dominant	No
16	Maculation	Markings on corolla	None, scarce, few, many	No
17b	Stamen hairs	Hairs on stamens present or absent	Absent, present	Yes
18*	Ovary hairs	Density of normal hairs on ovary	Hairy, dense	Yes
19*	Ovary glands	Glandular hairs on ovary present?	Absent, present	Yes
20	Style colour	Colour of the style	Green, red-green, red	Yes
21*	Style hairs	Type of hairs on style	Hairy, both, glandular, NA	No
Derived characters
22*	Leaf (width/length)	Leaf width/leaf length	Ratio, no unit	Yes
23*	Leaf (distapex-mid/length)	Distance apex-mid/leaf length	Ratio, no unit	Yes
24*	Leaf (petiole/length)	Petiole length/leaf length	Ratio, no unit	Yes
25*	Corolla (width/length)	Corolla width/corolla length	Ratio, no unit	Yes
26b	Style hair-coverage	Style hair cover/style length	Ratio, no unit	Yes

^*The character number indicates characters used for both MFA analyses.

^aUse in MFA 1.

^bUse in MFA 2 (Fig. 6).