418 



PRACTICAL GUIDE TO GAB DEN- PLANTS saxipeaga 



appear in July and August on stalks 12-18 

 in. high, and their beauty is enhanced by 

 the purple-coloured anthers in the centre. 

 Culture dc. as above for 8. ajugce- 

 folia. This species grows naturally in 

 moist and cool places, and may be given 

 similar situations in the rockery. It 

 must, however, be fully exposed to the air. 



S. aretioides. — A tiny Pyrenean spe- 

 cies about 2 in. high. Leaves crowded, 

 linear strap-shaped, upright, tipped with 

 a sharp point, margins fringed. Flowers 

 from May to July, golden-j'sUow, on 

 stalks covered with clammy down. There 

 are several varieties, among which may 

 be noted alba, with whitish flowers ; 

 pmcox, which flowers earlier than the 

 type ; and j^i-iinulina, with soft primrose- 

 yellow blossoms. 



Culture dc. as above for S. burse- 

 riana. 



S. aspera. — A naore or less tufted 

 species from the Alps and Pyrenees 

 closely related to S. ienella. It has 

 rosettes of small lance-shaped linear 

 leaves ending in a sharp point, with 

 •ciliated margins, and of a whitish shining 

 green. The yellowish- white flowers with 

 a deeper yellow base and golden-yellow 

 anthers appear in June and July. There 

 are several forms of this species. 



Culture dc. as for S.flageUaris, p. 420. 



S. atlantica. — A compact dwarf- 

 growing Rookfoil, native of the moist 

 rocks of Southern Spain and Algeria. The 

 light green roundish leaves have lobed or 

 •crenate edges, and the large white sweet- 

 scented flowers, 3-7 on a slender stem, 

 appear in April and May. 



Culture dc. as for S. granulata, p. 421. 



S. biflora. — A pretty and very variable 

 species of the oppositifolia group, native of 

 the high mountains of Central Europe. 

 The lower leaves of the trailing branched 

 stems are obovate roundish, while the 

 upper ones are more spoon-shaped, and 

 all are small, thick and fleshy, bright 

 greon or pm-plish. Nothwithstanding the 

 specific name, more than two flowers are 

 often borne on the stems. They appear 

 in June and July, and vary in colour 

 from deep violet to dark blue, and are 

 occasionally reddish or white. 



Culture dc. as for S. oppositifolia, 

 p. 424. 



S. biternata. — A hairy tufted species, 

 native of the Spanish mountains, with 



long-stalked, twice ternate, bright green 

 leaves, the lobes of which are more or less 

 deeply divided and bluntly toothed. The 

 wliite flowers, with spoon-shaped shallow 

 notched petals, appear about July. 



Culture dc. as for S. granulata 

 below. 



S. Boydi. — A charming Saxifrage said 

 to be a hybrid between the yellow- 

 flowered 8. aretioides and the milky- white 

 8. burseriana. The rosettes or tufts of 

 leaves more nearly resemble those of the 

 latter parent, but are linear and end 

 abruptly in a point. The flowers are 

 about I in. across, and appear from March 

 to June. They are soft primrose-yellow 

 in colour, and 1-3, rarely more, are borne 

 on the stems. The white-flowered variety 

 alba is very similar in appearance, but 

 shows more of the burseriana blood. 



Culture dc. as for S. burseriana. 



S. bronchialis. — A native of Northern 

 Asia and N. America about 6 in. high, 

 with ascending stems, densely leafy at 

 the base. Leaves stiffish, linear lance- 

 shaped, with ciliate or somewhat spiny 

 margins and a pointed apex. The yellow- 

 ish or creamy white flowers with oblong 

 petals appear in May, and are ornamented 

 with numerous orange-red dots. From 

 3 to 10 blossoms are borne on a more or 

 less hairy stem. 



Culture dc. as for 8.flagellaris, p. 420. 



S. burseriana. — A densely tufted, 

 moss-like plant, about 2 in. high, native 

 of the Alps. Leaves in rosettes, trique- 

 trous, smooth, glaucous. Flowers from 

 March to June, usually one on a slender 

 red stem, milky-white, large, and veined 

 with yellow. The variety major is a 

 beautiful rook plant with acute frmged 

 leaves in dense rosettes, and Isu-ge white 

 flowers on stalks about 2 in. high. 



Culture dc. as given above imder 

 general instructions. This species likes 

 a high and well-drained position in the 

 rockery, and is almost sm-e to fail if grown 

 in moist, marshy, or ill-drained spots. 

 Once established in suitable positions it 

 makes very fine carpets of green, studded 

 with white flowers. 



S. cxsia. — A pretty native of the Alps 

 and Pyrenees forming dense silvery tufts 

 often less than 1 in. high. Leaves 

 lineai--oblong, recurved, keeled, margined 

 with white, crustaceous dots. Flowers in 



