Assertion: cambium | /r/CapableOf | form layers of phloem
Facets:
value: periodically
type: TEMPORAL
value: in some other families
type: OTHER
Source sentences:
text: In some other families (Amaranthaceae, Nyctaginaceae, Salvadoraceae), the cambium also periodically forms inward strands or layers of phloem, embedded in the xylem: Such phloem strands are called included or interxylary phloem.