FLOWER POLLINATION 277 
1544. Holm, Th. Nowaia-Zemlias Vegetation, szerligt dens Phanerogamer. Dijmphna- 
Togtets zoologisk-botaniske Udbytte. Kjébenhavn, 1885. 
1545. Notes on the flowers of Anthoxanthum odoratum Z. Smithsonian Inst., Nation. 
Mus. Proc., Washington (D.C.), xv, 1892, pp. 399-403.—Ab.: Bot. Centralbl., 
Cassel, Beiheft. iii, 1893, p. 453. 
1546. Arctic and alpine plants, Bot. Gaz., Chicago (IIl.), xx, 1895, pp. 459-60. 
1547. The earliest record of arctic plants. Proc. Biol. Soc., Washington (D.C.), x, 
1896, pp. 103-7. 
1548. Pyrola aphylla. A morphological study. Bot. Gaz., Chicago (IIl.), xxv, 1898, 
pp. 246-54.—Ab.: Bot. Centralbl., Cassel, Beiheft. ix, 1900, pp. 179-80, 
1549. Podophyllum peltatum. A morphological study. Op. cit., xxvii, 1899, pp. 
419-34. 
1550. Obolaria virginica Z. A morphological and anatomical study. Ann. Bot. 
Oxford, xi, 1897, pp. 369-83.—Ab.: Bot. Centralbl., Cassel, Ixxiii, 1898, 
pp. 321-3. 
1551. Triadenum virginicum (L.) Rajfim. A morphological and anatomical study. Amer. 
J. Sci., Newhaven (Conn.), Ser. 4, xvi, 1903, pp. 369-77. 
1552. Holmgren, Aug. Emil. Bidrag till Kannedomen om Beeren Eilands och Spets- 
bergens Insekt-Fauna. Vet.-Ak. Handl., Stockholm, viii, 1869, No. 5, pp. 1-55. 
1553. Holmgren, H. J. Duft der Orchideen. Bot. Centralbl., Cassel, xiv, 1883, p. 320. 
1554. Holzner, G. Leitung der Pollenschlauche bei Hordeum und Bromus. Bot. 
Centralbl., Cassel, xii, 1882, p. 107. 
1555. Linné’s Beitrag zur Lehre der Sexualitat der Pflanzen. Flora, Marburg, Ixviii, 
1885, p. 580. 
1556. Hooker, J.D. Pringlea. Phil. Trans. R. Soc., London, clxviii, 1874, pp. 18-19 ; 
Nature, London, x, 1874, p. 134. 
1557. On Welwitschia, a new genus of Gnetaceae. Trans. Linn. Soc. (Bot.), London, 
xxiv, 1864. 
1558. Hooker, J. D., and Thomson, J. Praecursores ad Floram Indicam; being 
Sketches of the Natural Families of Indian Plants with remarks on their 
Distributive Structures and Affinities. [On Cleistogamic Flowers, p.7.] J.Linn. 
Soc., Bot., London, ii, 1858, pp. I et seq. 
1559. Hooker, W. J. Description of Victoria regia or Great Water-lily of South 
America. London, 1847, and (illustrated) 1851. 
1560. Hopkins, C.G. Methods of Corn Breeding. Agric. Exp. Sta., Illinois, Urbana 
(Ill.), Bull. No. 82, 1902, pp. 525-39. Reprinted in West Indian Bull., iv, 1903, 
pp. 9-22. 
1561. Hopping, Ralph. Some Notes on Coleoptera found on species of Ceanothus. 
[Amphicroum scutatum Fazv. and other beetles on the flowers of species of 
Ceanothus in California.] Ent. News Acad. Nat. Sci., Amer. Ent. Soc., 
Philadelphia (Pa.), x, 1899, p. 252. 
1562. Hori, S. Colours and scent of flowers. Bot. Mag., Toky6, iv, 1890, v, 1891, vi, 
1892. 
1563. Hornig, Herman. The feeding of the larva of Anthocharis (Midea) genutia. [In 
New Jersey the Papilionid Anthocharis genutia Bozsd. pollinates the flowers 
of Sisymbrium Thalianum, and the larvae live in its fruits.] Ent. News Acad. 
Nat Sci., Amer. Ent. Soc., Philadelphia (Pa.), xiv, 1903, p. 252. 
Houssay, F. See under Giard, A. 
Houtte, Van L. See under Planchon, J. E. 
1564. Howard, L.O. A new and remarkable Encyrtid: is it parasitic? [Tanaostigma 
as a gall-insect in the ovaries of Coursetia.] Bull. U.S. Dept. Agric., Div. 
Ent., Washington (D.C.), ili, 1890, pp. 145-8. 
