Leaf anatomy . Unicellular hairs branched, or unbranched. The mesophyll containing calcium oxalate crystals. The mesophyll crystals commonly druses. Stem anatomy .
Secretory cavities present.
Secondary thickening developing from a conventional cambial ring. Reproductive type, pollination . Inflorescence, floral, fruit and seed morphology . The terminal inflorescence unit cymose, or racemose. Free hypanthium absent.