• Darwin Archive | 'Power of movement': portfolios, 1862-1882 | Geotropism. Extant subfolders: 'Apogeotropism', 'Localized sensitivity to Geotropism in tips of Radicles', 'Pods burying themselves', 1877-10-30 - 1880-04-20 | Passiflora gracilis, 1877-10-30 - 1877-11-12 | Passiflora gracilis [backing sheet], 1877-10-30 - 1877-11-12

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