. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 152 ANGIOSPERMAE—DICOTYLEDONES Visitors.—Loew observed a bee, Prosopis communis NyL, skg., in the Berlin Botanic Garden. 376. G. repens L. (Harm. Miiller, 'Fertilisation,' p. 128, ' Alpenblumen,' pp. 191-2; Kerner, 'Nat. Hist. PI.,' Eng. Ed. i, II, p. 511; Ludwig, Bot. Centralb!., Cassel, xxxvi, 1888 ; Schulz, ' Beitrage,' II, pp. 19-20.)—The rose-red flowers vary from slight to marked protandry. Their diameter is scarcely 10 mm., but as the plant forms grea
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. 152 ANGIOSPERMAE—DICOTYLEDONES Visitors.—Loew observed a bee, Prosopis communis NyL, skg., in the Berlin Botanic Garden. 376. G. repens L. (Harm. Miiller, 'Fertilisation,' p. 128, ' Alpenblumen,' pp. 191-2; Kerner, 'Nat. Hist. PI.,' Eng. Ed. i, II, p. 511; Ludwig, Bot. Centralb!., Cassel, xxxvi, 1888 ; Schulz, ' Beitrage,' II, pp. 19-20.)—The rose-red flowers vary from slight to marked protandry. Their diameter is scarcely 10 mm., but as the plant forms great plots on the stony declivities of the Alps it is very conspicuous. Nectar is secreted in great abundance. In good weather the visits of insects are, therefore, numerous, so that crossing takes place. Should insect-visits fail, automatic self-pollination obtains in the more unfavourable places. Ludwig observed cases of gynodioecism, and more rarely of gynomonoecism. Visitors.—Herm. Miiller—in the Alps—observed chiefly flies (14 species), humble-bees {2), and Lepidoptera (5). A. Schulz noticed a similar set of visitors in the Tyrol, i. e. flies, bees, and Lepidoptera, as well as a few Fig. 45. Gypsopkila repens^ L. (after Herm. Miiller). A, Flower at the beginninjr ot" the first unaJe) condition. B. Flower at the end of this condition. C. Flower in the second (female) condition. «, anthers ; j/, stigma; k, nectary. MacLeod saw a bee and 13 flies in the Pyrenees (Bot. Jaarb. Dodonaea, Ghent, iii, 1891, pp. 375-6). 377. G. perfoliata L.— Visitors.—Loew observed the following Syiphids in the Berlin Botanic Garden :—i. Eristalis nemorum L.; 2. Syritta pipiens L. 378. G. elegans Bilb.—This species is protandrous and self-fertile (Comes, ' Stud. s. impoU. in ale. piante'). 116. Tunica Scop. Flowers protandrous or homogamous, with concealed nectar: sometimes gyno- dioecious, rarely gynomonoecious. 379. T. Saxifraga Scop.^Schulz ('Beitrage,' II, pp.
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