sentences:  "pansum", which is cespitose, remaining in a clump, and has corm-like caudices.Confusingly, plants sold in the horticultural trade labeled as "Aster ericoides", the old name of the plant, are almost invariably cultivars or hybrids involving the European garden plants "Symphyotrichum dumosum", "S. lateriflorum", "S. pilosum" or "S. racemosum", a mistake that has apparently occurred continuously since the 19th century.Asters are tough plants, though they can be subject to fungal infections, especially if not planted in open, sunny conditions where the soil is not too damp.