Gloria Pacosa can arrange just about anything, dinner parties, events, wedding flowers, pie baking, but when we got together the other day to shoot a TV show for Falls Cable in Shelburne Falls, I wanted her to arrange flowers. She had begun gathering material before I arrived. She had raided the flower garden for these dark scabiosa, the last of the sweet peas and gomphrena, as well as zinnias, sunflowers and        . She said just…