XV. The Anatomy of Welwitschia mirabilis, Hook. f., in the Seedling and Adult States. Forming Report No. 2 of the Percy Sladen Memorial Expedition to South-West Africa, 1908-1909
Published in Transactions of the Linnean Society of London. 2nd Series: Botany, in 1910, in volume 7, issue 15, pages 327-354
Date published:1910-10