What kind of stem does the lemon tree have?

What is the ideal temperature for orchids? How can I successfully grow orchids in air? What is the common name for the Araucaria tree? Are male zebras and female zebras different? What do you call people that loves bright colors? What is more then one cactus? In order to grow seeds must get to the? What is the latin name for the common orchid? Does seaweed have enemies? Why are my potatoes small? What is the abbreviation for treated wood? Can a monkey mow the Simpson's lawn? How can one effectively eliminate wild strawberries from their garden or yard? What kind of care does a spider plant take? Why do mushrooms grow in plants and what is their role in the ecosystem? How should I perform hard pruning on a viburnum plant to promote healthy growth and flowering? When to prune cranberry cotoneaster? How can I effectively create a raised bed on concrete with proper drainage? What plant has yellow flowers and green fuzzy leaves? If a tree hit by lightning is losing it's leaves will it come back next spring or is it dead?