. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ERICACEAE 35 Tribe Andromedeae. 521. Andromeda L. Flowers usually homogamous, wiih concealed nectar secreted at the base of the ovar}-. 1759. A. Polifolia L. (Loew, "Bliitenbiol. Floristik,' p. 270 ; Warming, Arkt. Vaxt. Biol.,' pp. ig-2i.)—In this species five or more delicate pendent flowers are arranged in an almost umbellate inflorescence at the end of the stem. The bright- red peduncles are about three times as long as the flowers, which are 5 mm.
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. ERICACEAE 35 Tribe Andromedeae. 521. Andromeda L. Flowers usually homogamous, wiih concealed nectar secreted at the base of the ovar}-. 1759. A. Polifolia L. (Loew, "Bliitenbiol. Floristik,' p. 270 ; Warming, Arkt. Vaxt. Biol.,' pp. ig-2i.)—In this species five or more delicate pendent flowers are arranged in an almost umbellate inflorescence at the end of the stem. The bright- red peduncles are about three times as long as the flowers, which are 5 mm. in The bell-shaped corolla-tube is red in five reddish longitudinal streaks. Loew. length and of about the same breadth colour, while the teeth are white with describes the bell as pos- sessing a pentagonal opening about li mm. broad, formed entirely by the short reflexed corolla-lobes. The inside of the corolla is clothed with hairs, and the filaments are also hairy. In this way the nectar secreted ^by ten swell- ings at the base of the ovary is protected, and pollen is prevented from falling out of the flower. The stigma is receptive when the flower opens, is situated in the opening of the corolla, and pro- jects beyond the dark-brown anthers, which Loew says mature simultaneousl}' in the March of Brandenburg. In normal flowers the anther-pores are directed inwards, and the appendages outwards. The nectar can be reached by a proboscis of 4-4^ mm. long. Warming states that in the arctic plants he examined automatic self-pollination could be eff'ected, should insect-visits fail, by fall of pollen on to the stigma, which completely fills the narrow opening of the corolla. Lindman, whose observations were made on the Dovrefjeld, says that the stigma becomes receptive in the bud, and he sometimes found pollen-grains on its edge, which is beset with five small rounded projections. In other cases he noticed pollen on the under-side of the stigma, suggesting insect-visits. Visitors
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