AN ENCYCLOPEDIA OF HORTICULTURE. 



371 



Saxifraga continued. 



bladder). Breakstone ; Rockfoil ; Saxifrage. Including 

 Ciliaria, Hirculw, Megasea, Miscopetalum, ifuscaria, 

 Robertsonia, Spatularia (of Haworth). OBD. Saxifragece. 

 A large genus of mostly hardy, perennial, rarely annual, 

 highly glabrous, pilose, or glandular, erect or decumbent 

 herbs, natives of the North and South temperate and 

 Arctic zones, rarely found in Asia, and very rare in 

 Sonth America; absent from Australia, South Africa, 

 and the Pacific. Flowers white or yellow, rarely 

 purple or rose, paniculate or corymbose ; calyx tube 

 short or elongated, free or adnate at the base with the 

 ovary; lobes five, erect or spreading, imbricated; petals 

 five, equal or rarely unequal, sometimes fimbriated or 

 gland-bearing at base, perigynous or sub-hypogynous ; 

 stamens ten, rarely five, inserted with the petals. 

 Leaves variable ; radical ones frequently rosnlate ; 

 cauline ones generally alternate ; petioles sheathing at 

 base. A dozen species are indigenous to Britain. The 

 best-known species are described below ; all, except 

 where otherwise stated, are hardy perennials. With few 

 exceptions, Saxifragas are amongst the easiest of plants 

 to cultivate, they may be grown in any open soil, and 

 generally prefer to be surrounded with stoneo. Propa- 

 gated readily by offsets or by division of the tufts. Great 

 variation is represented in the habits of the numerous 

 species. They are nearly all beautiful and interesting 

 subjects. 



FIG. 425. SAXIFRAGA CJ-SIA, showing Habit and detached 

 Rosette of Leaves. 



radkal ones cordate, on rather long petioles, with the lobes 



ss? ! rffi- ssSh-xffi. srsa- S- 



S. petrcea (B. M. 3026). 

 S adscendens (ascending), of Vahl. A synonym of S. aquatw. 

 s! aizoides (Aizoon-like). JL orange or golden-yellow dotted 



long Alpine and Arctic 



(Sy. 



Sazifraga continued. 



attenuated, very obtuse/minutely crenate-serrated ; cauline ones 

 oblong, serrated. Stems erect, glandular-hairy, few-leaved ; 

 branches racemose, h. tin. 1848. A hybrid between 5. Gtum 

 and 5. Aizoon. 



S. aqnatica (aquatic), fl. white, large, shortly pedicellate ; calyx 

 segments ovate-lanceolate, longer than the tube ; petals obovate- 

 oblong, more than twice the length of the calyx; inflorescence 

 w, crowded above. July and August. J. fleshy, 



, 



loose below, crowe aove. uy an August. J. fleshy, 

 sparsely pilose, dilated at base ; cauline ones sessile, incised- 

 trilobed above the middle. Stems simple or racemose-paniculate 

 from the base. h. lit. to lift. Pyrenees. (R. O. 1167.) SYX. 

 S. adscendem (of Vahl). 



S. aretloldea (Aretia-like).* fl., petals golden-yellow, crenulate, 

 with several straight nerves ; corymu dense, few-flowered ; 

 peduncles clothed with clammy down. May to July. I. aggre- 

 gate, linear-ligulate, upright, mucronulate, keeled, glaucous, with 

 cartilaginous margins, h. 2m. Pyrenees, 1826. (B. M. 5849.) 



S. bronchialls (bronchial), fl. cream-coloured ; calyx segment* 

 oblong-lanceolate, glabrous ; petals oblong, twice as long as the 

 calyx ; pedicels glandular, erecto-patent May. i. rather rigid, 

 linear-lanceolate, mucronulate at apex, the margins ciliated or 

 ciliate-spinulose. Stems ascending, densely leafy at base ; flori- 

 ferous ones paniculate above, h. 6in. North America, 1819. 

 SYN. S. densa. 



S. Bnrseriana (Burser's).* fl. milk-coloured, large and beautiful, 

 lin 



March to June. I. rosulate, triquetrous, pungent, smooth, glau- 

 cous. Stems usually one-flowered, h. IJin. Alps, 1826. Plant 

 densely tufted. (On., Sept. 17, 1877.) 



bout 2in. 

 A beau- 

 p. 14L) 



S. caasia (grey).* fl. milk-coloured, disposed in a small panicle ; 

 petals roundish, nnguiculate. May and June. I. linear-oblong. 

 aggregate, recurved, keeled, the upper surface with marginal 

 dots regularly disposed ; cauline ones few. Stems (and peduncles) 

 smoothish. A. l*in. to 3in. Alps, 1752. See Fig. 425. (J. F. A. 

 374; L.B. C. 421.) 



S. caespltosa (tufted).* fl. white, campanulate, few, small, 

 crowded. July and August 1. cuneate, three to five-lobed ; 

 lobes sub-parallel, obtuse ; upper cauline leaves undivided. 

 A. 3in. Europe (Britain). Plant densely tufted, with short, 

 flowerless shoots. (Sy. En. B. 556.) 



Bnrseriana (Burser's).* fl. milk-coloured, large and beautiful, 

 lined with yellowish nerves ; petals roundish, with curled edges. 

 March to June. I. rosulate, triquetrous, pungent, smooth, glau- 

 cous. Stems usually one-flowered, h. IJin. Alps, 1826. 

 densely tufted. (On., Sept. 17, 1877.) 

 S. B. major (larger).* fl. white, solitary, on peduncles a 

 high. L acute, ciliated, in small, dense rosettes. 1884. 

 tiful little rockwork plant (G. C. n. s., xxi. p. 14L) 



FIG. 426. SAXIFRAGA CAMPOSII. 

 )on Pedro del Campos').* fl. white, fin. in diameter, 



hairy; basal ones spathnlate, nearly Ungulate, flat, cuneate- 



S ( c*atophylla (horn-leaved). A lynonym of S. trifurcata. 



ass 



