SCROPHULARIACE^E 235 



Schinz and Keller point out that the genera Melampyrum, 

 Rhinanthus, Euphrasia, and certain Gentians present a seasonable 

 differentiation (un dimorphisme saisonnier) : ' Une espece donnee 

 peut se redoubler par adaptation directe a la station en une race 

 printaniere ou estivale peu rameuse, fleurissant et fructifiant de 

 bonne heure et une race automnale tres rameuse, fleurissant et 

 fructifiant plus tard.' * 



For information on these interesting points and for a full de- 

 scriptive account of the species and sub-species of this difficult 

 genus found in Switzerland the reader is referred to the Flore de la 

 Suisse, by Schinz and Vilczek. 



Rhinanthus sub-alpinus Schinz and Thellung. (Plate XXVIII.) 

 Plant 6-12 inches high. Stem streaked with black, almost 



glabrous. Leaves broadly lanceolate, crenate-dentate, sub-acute. 



Bracts triangular, ending in a short point, the lower teeth being 



subulate, aristate. Upper lip of corolla with violet lobes, narrowly 



conical, sub-acute, 2 mm. long. 

 Alpine and sub-alpine meadows in the Alps and Jura, and also in 



the plain of Switzerland. 



The writer did not see the plant which was drawn and here 



figured, and cannot be sure that it belongs to this species. 



PEDICULARIS L. Lousewort. 



Flowers usually in bracteate spikes or racemes, large and showy, 

 red or yellow. Calyx tubular or campanulate, often inflated, 2-5 

 toothed. Corolla 2-lipped, tube often dilated, upper lip entire or 

 notched, lower lip 3-lobed. Stamens 4. Anthers hairy. Erect 

 herbs with deeply divided leaves, turning black when dry, parasitic 

 upon roots. 



There are about 150 species inhabiting the mountainous parts 

 of Europe, Asia, Africa, and America. Many are acrid, and 

 consequently harmful to the pastures. Nearly all are Alpine or 

 sub-alpine, and the great majority in the Alps grow from about 

 4500-6000 feet, and having been fully treated in the author's Alpine 

 Plants of Europe, he does not propose to repeat many of those 

 descriptions here, but to give a brief summary of them and to add 

 a few species which grow at lower altitudes. This summary is 

 based on that of the late A. W. Bennett. 2 



A. Flowers yellow. Upper lip of corolla drawn out to a long narrow 



beak : 



P. elongata Kerner. Stem 6-12 inches, few-leaved, nearly 

 glabrous. Spike elongated. Calyx-teeth leaf-like, inciso-dentate, 

 bracts glabrous, pinnatifid. Leaves deeply pinnatifid. Segments 

 inciso-serrate. South-eastern Tyrol and Venetian Alps ; rare. 



1 Flore de la Sutsse (1909). Ed. frangaise par Wilczek et Schinz, p. 519. 



2 7^he Flora of the Alps. By A. W. Bennett (1897), vol. ii. p. 89. 



