xviii Obituary . — Henry Harold Welch Pearson . 
1911. Through Little Namaqualand with the Vasculum and the Camera. Gard. Chron., vol. 1, 
pp. 61, i2i, 166, 190, 200. 
1912. On the Microsporangium and Microspore of Gnetum , with some Notes on the Structure of the 
Inflorescence (Percy Sladen Mem. Exped. SW. Africa, 1908-9 ; Rep. XV). Ann. Bot., 
vol. xxvi, p. 603. 
1912. On theRooibloem (Isona or Witchweed). Agric. Journ. Union S. Africa, vol. iii, p. 651. 
1912. Itinerary of the Percy Sladen Mem. Exped. to the Orange River, 1910-1 1 ; Rep. VII. Ann. 
S. Afr. Mus., vol. ix, p. 21. 
1912. Le Vaillant’s Grotto at Heerenlogement (Percy Sladen Mem. Exped. SW. Africa ; Rep. XVII). 
The Geogr. Journ., vol. xxxix, p. 40. 
1912. Pearson, H. H. W., and Edith L. Stephens. List of the Plants collected in the Percy 
Sladen Mem. Exped., 1908-9, 1910-n ; Rep. VIII. Ann. S. African Mus., vol. ix, p. 30. 
[Subsequent Reports published in the Annals of the S. African Mus. were drawn up by the 
staff of the Bolus Herbarium and other workers under Prof. Pearson’s superintendence, but 
published under their names.] 
1913. List of Plants collected in the Percy Sladen Mem. Expeditions, Rep. XXVIII. Note on the 
localities visited by the Percy Sladen Mem. Exped. to the Khamiesberg, Giftberg, and 
Oliphant’s River Mountains, Sept. 1911. Ann. S. Afr. Mus., vol. ix, p. 129. 
1913. The National Botanic Garden. Gard. Chron., Aug. 30, p. 151. 
1913. Thymelaeaceae. Flora of Tropical Africa, vol. vi, p. 212. 
1914. The Problem of the Witchweed. Agric. Journ. Union S. Africa, vol. vi, p. 803. 
1914. Observations on the Internal Temperatures of Euphorbia virosa and Aloe dichotoma (Percy 
Sladen Mem. Exped., Rep. XXI). Ann. Bolus Herb., vol. i, pt. ii, p. 41. 
1914. On the Flora of the Great Karasberg (Percy Sladen Mem. Exped., Rep. LXIX). Ibid., 
pt. i, p. 1. 
1915. The National Botanic Garden. (Pamphlet.) 
1915. A Note on the Inflorescence and Flower of Gnetum. Ann. Bolus Herb., vol. i, pt. iv, p. 152. 
1915. Notes on the Morphology of certain Structures concerned in the Genus Gnetuiti. Trans. Linn. 
Soc., vol. viii, p. 3 1 1. 
1915. Communication on the experimental use of plants for fixing moving sand. Minutes of Proc. 
South African Soc. Civil Engineers, p. 268. 
1916. Exploration in South-West Africa. A Letter to Prof. Herdman. Nature, March 2, p. 4. 
1 On the Morphology of the Female Flower of Gnetum. Proc. R. Soc. S. Africa. [In the 
press.] 
1 On some Stages in the Life-history of Gnetum. By H. H. W. Pearson and Mary R. H. 
Thomson. Trans. S. Afr. Phil. Soc. [In the press.] 
1 For these titles I am indebted to the kindness of Mrs. L. Bolus. 
