While eminent as an entomologist Heer is chiefly known as a writer on Fossil Plants. He began to write on palaeobotanical subjects in 1841; among his most important publications, apart from the numerous papers contributed to scientific societies, the following may be mentioned: "Flora Tertiaria Helvetiae," 1855-59; the "Flora Fossilis Arctica," 7 volumes, 1869-83; "Die Urwelt der Schweiz," 1865; "Flora Fossilis Helvetiae," 1876-7. He was awarded the Wollaston medal of the Geological Society in 1874, and in 1878 he received a Royal medal. (Oswald Heer, "Bibliographie et Tables Iconographiques," par G. Malloizel, precede d'une Notice Biographique" par R. Zeiller; Stockholm.) -on continental extension. -on plants of Madeira. -on origin of species from monstrosities. -Darwin sends photograph to. -"Flora fossilis arctica." -letter to.
Heeria (see also Heterocentron). -F. Muller on.
Heifers, and sterility.
Helianthemum, Baillon's observations on pollen.
Heligoland, birds alight on sea near.
Heliotropism, experiments on. -of roots.
Hemsley, W.B., mentioned.
Hennessey.
Henry, I.A. (see Anderson-Henry) -letter to.
Henslow, Prof. J.S., life of. -Darwin's affection for. -Darwin's Cambridge recollections of. -death of. -letters to. -mentioned. -on Mus messorius. -visits Down. -Darwin on his parish work. -work on crossing.
Henslow, Miss, mentioned.
Herbaceous orders, in relation to trees.
Herbert, Dean, on heaths of S. Africa. -on Polygala. -on Cytisus Adami. -on self-fertility of Hippeastrum. -mentioned.
"Hereditary Genius," Francis Galton's.
Hereditary Improvement, Francis Galton on.
Heredity, Darwin's criticism of Galton's theory.
Hermaphroditism, in trees. -Weir on Lepidoptera and. -and nature of generative organs.
Herminium monorchis.
Heron, Sir R., on peacocks and colour.
Herons, as fruit-feeders.
Herschel, Sir J.F.W., edits "Manual of Scientific Enquiry." -on Natural Selection. -on the "Origin." -"Physical Geography." -on providential laws. -on heating of rocks. -on importance of generalising. -on study of languages. -versus Lyell on volcanic islands. -mentioned.
Heteranthera, two kinds of stamens. -H. reniformis.
Heterocentron, experiments on. -seeds of. -two kinds of stamens. -H. roseum, fertilisation mechanism of.
Heterogeny, Owen on.
Heteromorphic, use of term.
Heterosmilax, de Candolle on.
Heterostylism, Darwin's experiments on. -example in monocotyledons of.
Hewitt, on pheasant-hybrids. -mentioned.
Hibiscus.
Hicks, H., on pre-Cambrian rocks.
Hieracium, American species. -Nageli on. -variability of.
Highness, lowness and.
Hilaire, A. St., see St. Hilaire.
Hildebrand, F., article in "Botanische Zeitung." -experiments on direct action of pollen. -"Die Lebensdauer der Pflanzen." -letter to. -crossing work by. -on Delpino's work. -on dispersal of seeds. -self-sterility in Corydalis cava. -"Geschlechter-Vertheilung bei den Pflanzen." -on orchids. -on ovules formed after pollination. -experiment on potatoes. -on Salvia. -mentioned.
Hilgendorf, controversy with Sandberger.
Hillebrand's Flora of the Hawaiian Islands.
"Himalayan Journals," dedicated by Hooker to Darwin.
"Himalayan Plants, Illustrations of."
Himalayas, British plants in. -commingling of temperate and tropical plants. -tortoise of. -ice-action in. -mixed character of the vegetation.
Hinde, Dr., examination of Funafuti coral-reef cores by.
Hindmarsh, L., letter to.
Hippeastrum, Herbert on self-sterility of.
Hippopotamus, fossil in Madagascar.
Historic spirit, J. Morley's criticism of Darwin's lack of.
Hitcham, collection of Azorean plants made near.
Hobhouse, Sir A., Darwin meets.
Hochberg, K., letter to.
Hofmann, A.W., receives royal medal.
Holland, evolutionary opinions in. -flora of.
Holland, Sir H., on pangenesis. -mentioned. -on influence of mind on circulation.
Holly, effective work of insects in fertilisation of.
Hollyhock, Darwin's crossing experiments.