+
+|
+
+S. gracilis
+
+ |
+
+
+S. linarioides
+
+ |
+
+
+S. schlechtendaliana
+
+ |
+
+
+S. spartioides
+
+ |
+
+
+S. alborubra
+
+ |
+
+
+S. pulchella
+
+ |
+
+
+|
+Leaf venation
+ |
+Hyphodromous |
+Hyphodromous |
+Pinnipalmate |
+Pinnipalmate |
+Hyphodromous |
+Hyphodromous |
+
+
+|
+Corolla length
+(cm)
+ |
+1.2–1.3 |
+1.2–1.4 |
+1.2–1.7 |
+1.2–1.3 |
+1.1–2 |
+3–3.3 |
+
+
+|
+Corolla shape
+ |
+Infundibuliform |
+Infundibuliform |
+Infundibuliform |
+Infundibuliform |
+Salverform |
+Salverform |
+
+
+|
+Constriction
+ |
+Absent |
+Absent |
+Absent |
+Present at the middle of the tube distal portion |
+Present at the apex of the tube |
+Absent |
+
+
+|
+Size of the proximal portion of the tube
+(mm)
+ |
+5–5.2 × 1–1.2 |
+6–6.2 × 1.8–2.2 |
+6–9 × 2–4 |
+5.5–6.0 × 1–1.2 |
+Absent |
+Absent |
+
+
+|
+Size of the distal portion of the tube
+(mm)
+ |
+4.3–4.5 × 1.7–1.9 |
+3.8–4 × 2.5–2.8 |
+3–5 × 3–5 |
+3.8–4.0 × 2.8–3.0 |
+Absent |
+Absent |
+
+
+|
+Corolla tube color
+ |
+White to slightly pink, greenish at base |
+White to purple, greenish at base |
+Completely white or white with pink lines |
+Completely white or white with pink lines |
+Reddish to pale pinkish |
+Reddish to orange |
+
+
+|
+Corolla lobes shape
+ |
+Elliptical to narrowly elliptical |
+Ovate to widely ovate |
+Deltoid |
+Deltoid to widely deltoid |
+Widely ovate |
+Deltoid to widely deltoid |
+
+
+|
+Corolla lobes color
+ |
+Completely white or white and pink |
+Completely white or white with pink or purple |
+White with pink apex or with pink lines |
+Completely white or white with pink lines |
+Whitish |
+Yellowish |
+
+
+|
+Stigma position
+ |
+Included |
+Included |
+Included |
+Included |
+Exserted |
+Exserted |
+
+
+|
+Anther length
+(mm)
+ |
+1.7–1.8 |
+1.8–1.9 |
+1–1.2 |
+1.2–1.3 |
+2.5–2.8 |
+3–3.2 |
+
+
+|
+Stamen position
+ |
+Inserted |
+Inserted |
+Inserted |
+Inserted |
+Inserted |
+Exserted |
+
+
+|
+Metastilo length
+(mm)
+ |
+1.9–2.0 |
+1.7–1.8 |
+2–3 |
+2–3 |
+2–2.2 |
+6–7 |
+
+
+|
+Selected samples analyzed
+ |
+
+A. Miranda et al. 1727
+(PEUFR)
+ |
+
+A. Macedo et al. 135
+(UFP)
+ |
+
+H. Irwin et al. 20858
+(UB)
+ |
+
+L. Arruda & L. dos Santos 84
+(BHCB)
+ |
+
+J. Lima 374
+(HTSA)
+ |
+
+M. Alves 1247
+(UFP)
+ |
+
+
+