山羊百科，林文智老師的植物、山岳、攝影紀錄

• 《中国植物志》 第65(2)卷 (1977) >> 358页 PDF >> 白花枝子花 Dracocephalum heterophyllum；https://www.iplant.cn/info/Dracocephalum%20heterophyllum?t=z
• FOC Vol. 17 Page 127；9. Dracocephalum heterophyllum Bentham, Labiat. Gen. Spec. 738. 1835.；白花枝子花；http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200019575
  • Illustration；http://www.efloras.org/object_page.aspx?object_id=2720&flora_id=2
• Flora of Pakistan；5. Dracocephalum heterophyllum Benth., Lab. Gen. et Sp. 738. 1836；http://www.efloras.org/florataxon.aspx?flora_id=5&taxon_id=200019575
  • Illustration；http://www.efloras.org/object_page.aspx?object_id=96483&flora_id=5
• Nepal Checklist；Dracocephalum heterophyllum Benth., ; Lab. Gen. Sp. 738 (1835)；http://www.efloras.org/florataxon.aspx?flora_id=110&taxon_id=200019575

• Dracocephalum heterophyllum Benth.；This species is accepted；https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:446433-1

• Dracocephalum heterophyllum Benth., Labiat. Gen. Spec. 738 1835；https://bibdigital.rjb.csic.es/viewer/12582/?offset=#page=738&viewer=picture&o=bookmark&n=0&q=
  • Ruyschiana heterophylla (Benth.) House in Bull. New York State Mus. Nat. Hist. 243-244: 67 (1923)

Dracocephalum heterophyllum subsp. ovalifolium

• Dracocephalum heterophyllum subsp. ovalifolium A.L.Budantzev；This subspecies is accepted；https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:949756-1

• Dracocephalum heterophyllum subsp. ovalifolium A.L.Budantzev, Bot. Zhurn. (Moscow & Leningrad) 72(1): 93 (1987).