Blue to Purple Flowers 291 



peduncles, on which the solitary violet flowers are borne. 

 Orobanche fasciculate.-, or Naked Cancer-root, has scaly 

 stems which are thickened and knotty below, and bear on 

 their summits one or more clustered peduncles, and at the 

 end of each of the latter is a solitary, purplish or yellowish 

 flower. The calyx is five-toothed, and the corolla tubular, 

 over an inch long, with five spreading lobes and somewhat 

 bilabiate. This Cancer-root is parasitic on the roots of 

 Artemisia, Eriogonum and other plants growing in sandy 

 soil. 



BOSCHNIAKIA 



Boschniakia strobilacea. Broom-rape Family 



Stems: four to twelve inches high. Leaves: none. Flowers: calyx 

 short with two setaceous bractlets at base, irregular, the teeth subulate 

 from a broad base, corolla ventricon, upper lip erect. Fruit: capsule 

 globose, seeds light-coloured, with a spongy coat. 



Boschniakia is a parasitic herb, and has stout, thick, pur- 

 plish-brown clustered stems, the dense scales being much 

 imbricated. It flowers from near the ground in cone-like 

 spikes, and the bilabiate corolla has an entire upper lip, its 

 margins involute, and a naked two-lobed lower lip, the sta- 

 mens being densely woolly at the base. Its common host 

 plants are Gaultheria and Arctostaphylos. 



HAREBELL 



Campanula rotundifolia. Campanula Family 



Stems: slender, erect, simple or branched. Leaves: basal ones orbic- 

 ular or broadly ovate to cordate; cauline ones sessile, linear. Flowers: 

 buds erect on slender pedicels, flowers drooping or spreading; corolla 

 campanulate, five-lobed. 



These bells of brilliant purple-blue are familiar to every 

 traveller in the temperate zone, for from " Bonnie Scot- 



