CAPRIFOLIACEAE 



52i 



pollination is ensured when such visits take place. Our most important native 

 types of the order are therefore distributed as follows among the flower classes. — 



Po, Sambucus; 



E, Viburnum, Adoxa ; 



C, Symphoricarpos, Linnaea, Lonicera alpigena, L. tatarica, L. Xylosteum ; 



H, Lonicera caerulea, L. nigra ; 



Lm, Lonicera Periclymenum, L. Caprifolium. 



383. Adoxa L. 



Flowers inconspicuous, greenish; homogamous or protogynous ; with exposed 

 nectar, secreted by a fleshy ring at the base of the stamens. 



1207. A. Moschatellina L. (Herm. Miiller, 'Fertilisation,' pp. 289-90; Ricca, 

 Atti Soc. ital. sc. nat., Milano, xiii, 1870; MacLeod, Bot. Jaarb. Dodonaea, Ghent, v, 

 1893, p. 389 ; Knuth, ' Bloemenbiol. Bijdragen ' ; Kerner, ' Nat. Hist. PI.,' Eng. Ed. i, 

 II, pp. 334-5; Kirchner, 'Flora v. Stuttgart,' p. 668.) — The flowers of this species 



Fig. 160. Adoxa Moscliaiellina^ L. (after Herm. Muller). (i) Terminal flower, seen from above 

 ( X3i). (2) Ditto, seen from below. (3) Lateral flower, opened and spread out, the style pressed 

 downwards; seen from the front. I4) Ditto, seen from behind. (5) Part of a flower with two (divided) 

 stamens { x 7). (6) Style of a terminal flower, seen from the side. (7, immature half-anther; «', ditto, 

 mature ; /j, nectary ; ov, ovary ; />, petal of the terminal flower; ^', upper petal of a lateral flower ; p-, 

 lower petal of ditto; p\ lateral petal of ditto; s, sepal ; j/, stigma. 



are arranged in a cuboidal head, and exhale a faint musky odour. According to 

 Hermann Muller, the stamens of the terminal tetramerous flower are directed upwards, 

 while those of the four lateral pentamerous flowers are directed outwards. The 

 anthers are at the same level as the stigmas, which develop simultaneously. When 

 nectar-hcking or pollen-devouring insects creep over the blossoms, they sometimes 

 touch the anthers and sometimes the stigmas with their feet or proboscis ; and 

 chiefly effect cross-pollination. Automatic self-pollination is possible in the lateral 

 flowers, by the fall of pollen on the edges of the stigmas ; in the terminal ones this 

 only takes place when the plant is bent over by the wind. Kerner describes the 

 flowers as protogynous, and says that the anthers are at first remote from the 

 stigmas; the filaments later on inclining inwards, so as to bring about self-pollination. 



