610 



PB ACTIO AL GUIDE TO GARDEN PLANTS peimula 



clothed with downy glandular hairs. The 

 flower-stems, 2-3 in. high, appear in 

 April and May and are surmounted by 

 an umbel of rosy-carmine or purple 

 flowers. 



Culture dc. as above. This species 

 flourishes in well-drained sandy loam or 

 peat, and may be grown in crevices or 

 fissures in the rock garden. 



P. Huguenini. — A tufted natural hy- 

 brid between P. glutinosa and P. integri- 

 folia. Leaves in dense rosettes, 1 in. long, 

 obovate or lance-shaped, toothed towards 

 the apex. Flowers in April and May, 

 large, deep purple, several on a scape 2-3 

 in. high. 



Culture dc. as above. The rockery in 

 sandy soil and leaf mould. 



P. Huteri. — A pretty little Tyrolese 

 hybrid, about 1 in. high, between P. glu- 

 tinosa and P. integrifolia. Leaves long 

 spoon-shaped, with 11-15 short broad 

 teeth thickened at the tips. Flowers in 

 May, deep violet, on clammy scapes. 



Culture dc. as above. Crevices in the 

 rock garden in gritty soil. 



P. imperialis (Royal Cowslip). — A 

 distinct and attractive species, native of 

 the Pangerango and Gedah mountains in 

 Java, where it grows wild at an elevation 

 of 9000 ft. The leaves are like those of 

 P. ja/ponioa but larger, sometimes mea- 

 suring 18 in. long by 5 in, wide. The 

 stout erect scape (which sometimes reaches 

 a height of 3 ft. in a wild state) springs 

 from the centre of the rosette of oblong 

 spoon-shaped coarsely toothed or crenate 

 leaves, and is quite i in. in diameter at 

 the base. The deep yellow or orange 

 flowers, about J in. across, are in whorls 

 as in P. japonica, the lowest whorl being 

 18 in. from the base of the scape. As 

 many as 12-20 flowers are in each whorl, 

 the buds being erect, while the expanded 

 blossoms are horizontal or drooping, and 

 the calyx is covered with a white mealy 

 powder. 



Culture dc. as above. This species 

 ripens seeds in cultivation, and although a 

 native of a tropical country it is found at 

 such an elevation that it is practically a 

 temperate plant. Indeed Honeysuckles 

 (p. 482), St. John's Wort (p. 265), and 

 Guelder Roses (p. 480) are found on the 

 same mountains at lower elevations, so 

 that wherever these shrubs grow the 

 ' Royal Cowslip,' as this Javan species 



has been called, will also grow equally 

 well. By continually raising plants from 

 home-saved seeds sown in cold frames as 

 soon as ripe, it may be possible in the 

 course of time to eliminate any tender 

 qualities the species is Kkely to possess. 

 As P. prolifera (p. 614) has been confased 

 with this species in the ' Botanical Maga- 

 zine,' t. 6732, it may be as weU to say 

 that the two plants are quite distinct, 

 although both have yeUow flowers. The 

 true P. imperialis is figured in a later 

 issue of the ' Botanical Magazine,' t. 7217, 

 and also in the ' Garden ' for September 

 19, 1891. 



P. integrifolia (P. candolleana). — A 

 pretty compact-growing species, 2-8 in. 

 high, native of the Pyrenees and Switzer- 

 land. Leaves elliptic or oblong, entire, 

 smooth, shining, edges fringed. Flowers 

 in spring and early summer, rosy, 1-3 on 

 scapes 2-3 in. high. Corolla lobes deeply 

 cleft. 



Culture dc. as above. Moist rich loam 

 in the rockery. 



P. intermedia. — A pretty Tyrolese 

 hybrid between P. clusiana and P. 

 minima. Flowers fragrant, purple-crim- 

 son, with a bright yellow eye, on stout 

 erect scapes. 



Culture dc. as above. Sheltered parts 

 of the rockery in sandy soU. 



P. involucrata. — A beautiful Hima- 

 layan species 5-7 in. high. Leaves erect, 

 oblong lance-shaped, bright green, 

 narrowed into a stalk. Flowers from 

 March to May, creamy white, with a 

 yellowish centre, in umbels. CoroUa 

 lobes roundish. 



Culture dc. as above. This species 

 flourishes in very moist or swampy 

 places, and is sometimes grown in pots 

 plunged half-way up in water. The 

 variety Munroi, which requires similar 

 treatment, is somewhat taller, vidth 

 heart-shaped slightly toothed leaves on 

 long stalks, and white flowers with a 

 yellow centre, fragrant. 



P. japonica [Japanese Primrose). — A 

 splendid Japanese species 1-2 ft, high. 

 Leaves 6-12 in. long, oblong spoon-shaped, 

 tapering towards the base, coarsely and 

 irregularly toothed. Flowers in May and 

 June, about 1 in. across, deep or pale 

 crimson, on scapes 1-2 ft. high, with 5-6 

 many-flowered whorls, lower ones opening 

 first. There are several colour forms — 



