72 



ANGIOSPERMAE—DICOTYLEDONES 



P. villosa Jacq. is apparently P. hirsuta AIL, for the former is only to be found 

 in Steiermark. Gremli (' Exkursionsflora fur die Schweiz,' 6. Aufi., 1889, p. 359) 

 says that P. hirsuta All. is identical with P. viscosa Vill., but not with P. villosa 



Koch, nor with P. villosayac^. 

 [P. villosa Jacq. = P. villosa 

 Wul/., according to the Index 

 Kewensis^ 



The flowers are of a 

 dark violet-red colour, with 

 a tube 10-13 ™™- long, but 

 hardly li mm. wide, so that 

 only Lepidoptera can get at 

 the nectar. {C/. Fig. 243.) 



Visitors. — Herm. Miil- 

 ler observed 3 butterflies ; 

 also a beetle as an unbidden 

 guest. 



1818. P. viscosa All. 



Fig. 24,^. Primula villosa, Jacq. (?) (after Herm. Miillerl. 

 Short- and long-styled flowers, seen from the side (natural size). 

 Do., seen from above. E, F. Do. in longitudinal section. 



A, B. 

 C,D. 



(=P. latifolia Koch, and P. 

 graveolens Heg). (Herm. Miiller, ' Alpenblumen,' pp. 367-9.) — This species bears 

 dimorphous heterostylous butterfly flowers. The corolla-tube is so narrow, that 

 between it and the stigma the distance is scarcely i mm., and consequendy the 



Fig. 244. Primula viscosa, L. (after Herm. Miiller). A, B. Short- and long-styled flowers, partly 

 dissected ( X 2). C, D. Stigmas of do. (.x 7). E, F. Stigmatic papillae of do. G,H. DrypoUcn. 



grains of do. J, K. The same, moistened. L. Cross-section of a long.styled flower just above the 



stigma ( X 7). 



nectar can only legitimately be sucked by the proboscis of a lepidopterous insect, 

 which must at the same time touch the anthers and stigma. The requisite length 

 of proboscis is 12-14 mm.' {Cf. Fig. 244.) 



Visitors. — Herm. Miiller only observed useless (Rhingia campestris Mg.) and 

 injurious (Bombus mastrucatus Gersl., stealing nectar) guests. 



