Table 1.
Leaf shapes, definitions, correction factors (CF) and interquartile range (IQR) of CF for three schemes of leaf shapes. Examples correspond to panels in Fig. 1. Leaf shapes and definitions are based on Ellis et al. (2009) (except for highly dissected fern fronds categorized as fern)
| Shape scheme 1 | CF (IQR) | Definition shape scheme 1 | Shape scheme 2 | CF (IQR) | Definition shape scheme 2 | Shape scheme 3 | CF (IQR) | Definition shape scheme 3 | Examples |
|---|---|---|---|---|---|---|---|---|---|
| Unlobed | 0.69 (0.08) | Leaf has no lobes | Elliptic (sensu lato) | 0.70 (0.08) | Unlobed leaf with widest part in the middle one-fifth and L : W < 10 : 1. | Elliptic (sensu stricto) | 0.69 (0.07) | Elliptic leaf with L : W between 10 : 1 and 1 : 1. | A |
| Orbicular | 0.71 (0.09) | Elliptic leaf with L : W from 1.2 : 1. | B | ||||||
| Oblate | 0.79 (0.09) | Elliptic leaf with L : W between 1 : 1 and 1.2 : 1. | C | ||||||
| Oblong | 0.73 (0.06) | Elliptic leaf with opposite margins roughly parallel for at least the middle one-third of leaf. | D | ||||||
| Obovate (sensu lato) | 0.66 (0.07) | Unlobed leaf with widest part in the distal two-fifths. | Obovate (sensu stricto) | 0.67 (0.07) | Obovate leaf with the widest part in the distal two-fifths and L : W < 3 : 1. | E | |||
| Oblanceolate | 0.64 (0.05) | Obovate leaf with L : W between 3 : 1 and 10 : 1. | F | ||||||
| Ovate (sensu lato) | 0.68 (0.08) | Unlobed leaf with widest part in the proximal two-fifths. | Ovate (sensu stricto) | 0.67 (0.06) | Ovate leaf with proximal two-fifths with L : W < 3 : 1. | G | |||
| Lanceolate | 0.70 (0.08) | Ovate leaf with L : W between 3 : 1 and 10 : 1. | H | ||||||
| Linear | 0.71 (0.17) | Unlobed leaf with L : W > 10 : 1, regardless of position of widest part of leaf. | Linear | 0.71 (0.17) | Same as for shape scheme 2. | I | |||
| Lobed | 0.53 (0.20) | Leaf has lobes | Palmately lobed (sensu lato) | 0.58 (0.17) | Lobed leaf where major veins of lobes are primary veins that arise from leaf base. | Palmately lobed (sensu stricto) | 0.61 (0.16) | Palmately lobed leaf with veins reaching to ~2/3 to the petiole. | J |
| Palmatisect | 0.47 (0.13) | Palmately lobed leaf with incision reaching almost to the petiole but without resulting in distinct leaflets. Includes hastate and deltoid. | K | ||||||
| Pinnately lobed (sensu lato) | 0.53 (0.20) | Lobed leaf where major veins of lobes are formed by costal secondaries. | Pinnately lobed (sensu stricto) | 0.55 (0.19) | Pinnately lobed leaf with veins reacching to ~2/3 to the petiole. | L | |||
| Pinnatisect | 0.39 (0.19) | Pinnately lobed leaf with incision reaching almost to the midvein but without resulting in distinct leaflets. | M | ||||||
| Fern | 0.41 (0.11) | Highly dissected fern fronds. | Fern | 0.41 (0.11) | Same as for shape scheme 2. | N |