What are the rigs inside a tree trunk called?

Which fruit grows in spring? Why is the ovule important? Is voavanga a fruit or veggtible? What do you call the green bit of a strawberry? How can you effectively protect your garden from animals? How effective is a reel mower in cutting long grass? How many inches of dirt are needed to grow grass effectively? Does Cameroon have green cardamom? How can I protect my water plants before a freeze? Why is my Madagascar Dragon Tree dying and how can I save it? How do you treat lice on purple hull peas? Do maple trees grow in ooty? Will cherries ripen off the tree, and if so, how can I ensure they ripen properly? How can I effectively remove wild strawberries from my lawn? What is special about palm trees habitat? Can you identify a mulberry tree by its distinctive leaves and fruit? Where does the garden sage come from.where in the US is it located.? What are fruits of ceral plants called? Is seaweed an organism? How long does it take for a daffodil bulb to sprout?