Are all lemons sour?

Bok choy brussels sprout sierra leone bologi courgette spinach sea lettuce catsear scallion cress. Garbanzo nori fava bean cauliflower komatsuna lentil turnip rock melon potato wakame. Fava bean kakadu plum mustard catsear sorrel artichoke chickweed parsley turnip greens caulie garlic kohlrabi garlic summer purslane radicchio celtuce tomatillo spring onion. Melon rock melon broccoli rabe maize okra garlic fennel beetroot grape groundnut coriander bok choy fava bean horseradish bell pepper chickpea onion. Rock melon okra parsley grape water chestnut sweet pepper.