P. pyrenaicus - Winter Heliotrope. Where A adaxial and B abaxial leaf surfaces (immature leaf and leaf bud is also shown). Leaves are suborbicular and not lobed; up to 20 cm across, petioles to 30 cm C inflorescence (November-February). Erect flowering stems (to 30 cm) bear few medium-broad bracts and a panicle of capitula; flowers are white tinged purple and strongly almond-scented D and E low growing, compact, closed canopy of leaves growing adjacent to a road (D) and stream (E) F P. pyrenaicus growing on the bank of Roath Brook (Cardiff, UK). Note depth of rhizome system (bank is ~2 m above the river channel), that the majority of rhizome is concentrated in the top 50 cm of the soil profile and erosion of the riverbank due to ineffective binding of soil by P. pyrenaicus rhizomes and roots. (Images courtesy of D. Jones)