SCROPHULARINEAE 



205 



669. Pedicularis L. 



Homogamous, rarely protogynous, humble-bee flowers, red or yellow in colour ; 

 with nectar secreted by a unilateral swelling on the lower side of the ovary. Ekstam 

 observed no insect-visits in Nova Zemlia (Vet.-Ak. Ofvers., Stockholm, li, 1895). 



2147. P. sylvatica L. (Sprengel, 'Entd. Geh.,' pp. 216-17; Hildebrand, 

 Bot. Ztg., Leipzig, xxiv, 1866, p. 73; Ogle, Pop. Sci. Rev., London, ix, 1870, 

 PP' 45~7J Herm. MuUer, 'Fertilisation,' pp. 450-4, 'Weit. Beob.,' Ill, p. 41; 

 Kirchner, 'Flora v. Stuttgart,' p. 597; Knuth, 'Bl. u. Insekt. a. d. nordfr. Ins.,' 

 pp. 113, 165; Schulz, 'Beitrage,' II, p. 218.) Hermann Miiller corrects the errors 

 and supplies the omissions of Sprengel, Hildebrand, and Ogle, giving the following 



Fig. 304. Pedicularis sylvatica, L. (after Herm. MttUer). (i) Corolla, from the front. (2) Flower, 

 frotn behind. {3) Upper part of the corolla, from the left side, after part of it has been cut away, 

 and the anthers separated. (4) Transverse section of the corolla at c in (i). (i and 2 x 3i; 4x7.) 

 a, point of insertion of the anterior stamens; b, point of origin of the lower lip; be, lower part of the 

 mouth of the flower, closed by the apposition of the lower lip ; d, revolute edge of the upper lip, set 

 with teeth; f, the hood which surrounds the anthers; g, pendulous tip of the hood; h, ridge upon the 

 side of the corolla, meeting the revolute border at e ; /fe and /, shorter and longer stamens. 



comprehensive account of the mechanism of the rose-red flowers of this species 

 (' Fertilisation,' pp. 450-4). 



' Honey is secreted by the green, fleshy base of the ovary, and lies at the bottom 

 of the tube, which is lo to 14 mm. long, laterally compressed, and so narrow that 

 a humble-bee can only insert the forepart of its head. At the height of 10 to 14 mm. 

 the tube divides into an upper lip, which both in form and in direction is simply 



