ALPHABETICAL LIST OF PLANTS 323 



p. Sieberi. — Requires a sunny aspect in moist, peaty, and loamy 

 soil, with sand added. Forms a compact tuft, with dark blue flower 

 heads on stems about 5 inches high. Blooms in May and June, and 

 can be increased by division. 



P. humilis. — Dry, sheltered position in sandy loam. Dark blue 

 flowers on stems 6 inches high, in June. It should be kept dry 

 during the winter, but requires plenty of moisture during the 

 summer. It blooms in June. 



P. Scheiichzeri. — Sandy soil in open position. Forms a nice tuft 

 of rather long narrow leaves and round heads of deep-blue flowers, 

 on stems about 8 to 12 inches high. Easily raised from seed. 



PiERis {see Andromeda) 



PiNGUicuLA (Lentibulariaceae), Buttciwort 



Interesting little plants for wet, boggy spots. 



P. alpina. — Needs moist peat and gravelly soil, and forms flat 

 rosettes of fleshy leaves. Flowers white, with yellow markings on 

 the tip. Roots firmly by means of woody fibres, and in this is very 

 different to P. grandifiora. 



P. grandifiora. — Requires moist peat. Forms rosettes of light 

 green, fleshy leaves lying close to the ground, from which rise, on 

 stems about 3 inches high, the deep blue flowers like a violet. It 

 is not easy to cultivate, though a native. This is owing to the roots 

 being very few and only on the surface. Probably the best way 

 would be by sowing seed on the spot assigned to it. P. vulgaris 

 is a commoner and smaller form. 



P. vallisneriaefolia. — Requires a dripping fissure m limestone 

 rock, with ample drainage. Large, pale yellowish-green leaves. 

 Large, pale lilac flowers, with white centres. Rather a distinct 

 species. 



Platycodon {&ee Campanula grandiflora) 



Plumbago Larpentae (Plumbaginaceae), syn. 

 Ceratostigma Plumbaginoides 



A deciduous plant, with rather woody stems, of a semi -prostrate 

 habit, growing about 12 inches high. It will grow in any soil, but 

 in a light sandy soil it blooms better. The flowers, which are 

 borne in trusses, are of a fine deep blue. It is a valuable plant 

 on account of its late flowers, which last till the November frosts 

 destroy them. Quite hardy, and grows rapidly. Easily increased 

 by division. 



