He was allergic to hedges?

(from Flaubert's Mme. Bovary):

She went out. The walls trembled, the ceiling was crushing her, and she passed back through the long alley, stumbling against the heaps of dead leaves scattered by the wind. At last she reached the ha-ha hedge in front of the gate; she broke her nails against the lock in her haste to open it. Then a hundred steps farther on, breathless, almost falling, she stopped. And now turning round, she once more saw the impassive chateau, with the park, the gardens, the three courts, and all the windows of the fa�ade....