. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ONAGRARIEAE 445 are usually on a level with the stigmas, autogamy is the rule, and Kerner says it may take place as early as the first day of anthesis. It is excluded in flowers where the long stamens do not reach the stigmas. Visitors.—These are few. Herm. MUller observed flies (Anthomyia j, po-cltg.), and a butterfly (Pieris napi L., skg.) ('Weit. Beob.,' II, p. 237). Schletterer records the humble-bee Bombus pomorum for the Tyrol. MacLeod saw a hover-fly
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ONAGRARIEAE 445 are usually on a level with the stigmas, autogamy is the rule, and Kerner says it may take place as early as the first day of anthesis. It is excluded in flowers where the long stamens do not reach the stigmas. Visitors.—These are few. Herm. MUller observed flies (Anthomyia j, po-cltg.), and a butterfly (Pieris napi L., skg.) ('Weit. Beob.,' II, p. 237). Schletterer records the humble-bee Bombus pomorum for the Tyrol. MacLeod saw a hover-fly and a beetle in Flanders (Bot. Jaarb. Dodonaea, Ghent, vi, 1894, p. 298). In Dumfriesshire, 2 Muscids and 2 Syrphids were recorded (Scott-Elliot, ' Flora of Dumfriesshire,' p. 65). 1046. E, collinum C. C. Gmel.—In this species again, according to Kerner, automatic self-pollination may take place on the first day of anthesis, the stamens being long enough for the anthers to touch the Fig. 152. Epilobiuni alsiiii/olium^ ^'///. (after Herm. Miil'.er). A. Young flower, shortly after opening : the upper parts of the sepals and petals have been removed. B. Older flower, after removal of two sepals and petals (x 7). a' and a^, anthers of long and short stamens ; gr^ style; ;;, nectar: tTz/, ovary; ^, petal; /o, pollen ; .r, sepal ; ji/, nectar-cover; j/, stigma. Visitors.—Herm. Miiller saw 2 short-tongued bees in the Alps ('Alpenblumen,' p. 213). 1047. E. roseum Retz.—Schulz says that automatic self-pollination is usually inevitable in the homogamous flowers of this species, the anthers of the long stamens reaching the level of the non-divergent stigmas and coming into contact with them. Visitors.— MacLeod saw the butterfly Pieris napi L. in Flanders (Bot. Jaarb. Dodonaea, Ghent, vi, 1894, p. 296).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustra
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