Henry Harold Welch Pearson.. 
145 
1912. "La Vaillant's G-rotto at Heerenlogement " (* Gi-eogr. Journ.,' 
vol. xxxix, pp. 40-47, with sketch-map and 3 figs.). 
1912. " On the Microsporangium and Microspore of Gnetum, with some 
Notes on the Structure of the Inflorescence" ('Ann. Bot.,' 
vol. xxvi, pp. 603-620, t. 60, and 6 text-figs.). 
1912&1913. " List of Plants collected in the Percy Sladen Memorial 
Expeditions, 1908-9, 1910-11 (Portulaceae), by H. H. W. P. and 
E. L. Stephens" ('Ann. S. African Mus.,' vol. ix, pp. 30-35) ; 
Yerbenaceae {loc. cit., vol. ix, pp. 183-184). 
1912. "On the Rooibloem (Isona or Witch weed) " ('Agric. Journ. Union 
S. Africa,' vol. iii, pp. 651-655; 'Union S. Africa, Dep. Agric' 
(leaflet), no. 30, pp. 1-7). 
1913. " The Problem of the Witchweed " ('Agric. Journ. S. Africa,' vol.vi, 
pp. 803-805; 'Union S. Africa, Dep. Agric' (leaflet), no. 40, 
(pp. 1-34, with 9 figs.. 
1913. " Note on the Localities visited by the Percy Sladen Memorial 
Expedition to the Khamiesberg, G-iftberg, and Oliphant's Eiver 
Mountains, September, 1911 " ('Ann. S. African Mus.,' vol. ix, 
pp. 129-131). 
1913. " The National Botanic Oarden (for South Africa) " (' G-ard. Chron.,' 
vol. liv., pp. 150-151, with sketch map). 
1914. " On the Flora of the Great Karasberg " : Introduction ('Ann. Bolus 
Herb.,' vol. i, pp. 1-8). 
1914. " Observations on the Internal Temperatures of Eu])horhia virosa 
and Aloe dichotoma " ('Ann. Bolus. Herb.,' vol. i, pp, 41-66). 
1915. "Note on the Inflorescence and Flower of Gnetum'' ('Ann. Bolus 
Herb.,' vol. i, pp. 152-172, tt. 24-26). 
1915. " Communication on the Experimental Use of Plants for Fixing 
Moving Sand " ('Min. Pro. of the S. African Soc. Civil Engineers,' 
pp. 268-270). 
1915. " Notes on the Morphology of Certain Structures concerned in 
Reproduction in the Genus Gnetum " (' Journ. Linn. Soc.,' vol. xliii, 
pp. 55-56). 
WOEKS. 
1914-16. Editor of : 
(1) ' Annals of the Bolus Herbarium,' vols, i-ii, part 1. 
(2) ' Journal of the Botanical Society of South Africa.' 
