Meaning of calyptera | Babel Free

Examples

“When the sporophyte has attained about a quarter of its eventual length, it pushes through the apex of the calyptera and grows upward above the perianth (Fig. 32B).”

“Because the calyptera protects the ovule from injury by surface sterilization treatments, a 1-2% sodium hypochlorite (« 10-20% household bleach) with .01% Tween-20 may be used for 10-15 minutes with vigorous shaking.”

CEFR level