By his visiting ethnic groups, organizing debates among religious leaders and his listening and promoting dialogue, he received from opponents the mocking nickname of tea drinker an image that would be exploited by them when he returned in the Dutch national politics in 2010
इंग्लंड येथे कार्यरत असताना, त्यांचे वनस्पतीशास्त्रातील ज्ञान आणि कार्य यांची महती ऐकून स्वतः जवाहरलाल नेहरूंनी तिला भारतात परत येऊन ‘बोटॅनिकल सव्‍‌र्हे ऑफ इंडिया’ची पुनर्रचना करण्याचे निमंत्रण दिले.