. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. COMPOSITAE 575 1316. A. alpina Bluff et Fing (=A. viridis Cass., and Cacalia alpina Z.). (Herm. Muller, ' Alpenblumen,' pp. 450-2.)—As in Eupatorium cannabinum, each head in this species contains only 4-5 florets; the corolla consists of a tube about 3 mm. long, with a slightly longer bell. When the two stylar branches diverge they often rupture the anther-cylinder, and ultimately bend back so far that the stigmatic papillae touch the sweeping-hairs, so that
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. COMPOSITAE 575 1316. A. alpina Bluff et Fing (=A. viridis Cass., and Cacalia alpina Z.). (Herm. Muller, ' Alpenblumen,' pp. 450-2.)—As in Eupatorium cannabinum, each head in this species contains only 4-5 florets; the corolla consists of a tube about 3 mm. long, with a slightly longer bell. When the two stylar branches diverge they often rupture the anther-cylinder, and ultimately bend back so far that the stigmatic papillae touch the sweeping-hairs, so that if any pollen-grains still cling to these automatic self-pollination may be effected. Visitors.—The following were recorded by the observers, and for the localities stated.— Herm. Muller (Alps), chiefly Lepidoptera (21), less frequently beetles (14) and Hymenoptera (4). Schletterer and von Dalla Torre (Tyrol) record the humble-bee Bombus terrester. 1317. A. albida Cass. (= A. albifrons Reichb.). (Herm. Muller, ' Alpenblumen,' p. 452.)—Kerner states that there are no sweeping-hairs in this species, so that the pollen is pressed out by the ends of the stylar branches. WL . ,1, ^^j- ,/, Visitors.—The fol- lowing were recorded by the observers, and for the localities stated.— Herm. Muller (Alps), only Diptera (Echino- myia andEristalis), though probably the chief visitors are Lepidoptera as in the last species. Loew (Altvatergebirge), a Chry- somelid (Chrysomela ca- Caliae 6'f^r., subsp. sene- fig. 193. Homofyue a!pina, Cass. (siheT HeTm. UHWeT). .,4. Disk- Cionis Schumm), and a floreti,, the first (male) stage; pappus omitted A Ditto in the second '' female) stage. C. D, E. with reduced corolla limb and long Pyralid (undetermined sp., protruding style, skg.). 1318. A. hybrida DC. (=A. candidissima Cass.). (Herm. Muller, 'Alpen- blumen,' p. 452.)— Visitors.—Herm. Muller only observed the hover-fly Eristalis tenax Z., skg. and po-dvg. 415. Homogyne Cass.
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