ROCHEA 



place to induce perfect and early maturity. During 

 winter the plants may be kept in a sunny frame or cool, 

 light greenhouse, with only suflioient water to prevent 

 shriveling. 



A. Clusters usually S-flowered. 



jasmlnea, DC. (Crdssnla jasminea,KeT-Gawl) . Stem 



herbaceous, 4—12 in. high, decumbent, branched, flower 



ing part erect: Ivs. fleshy, oblong-oval, %-% in. long. 



ROCK GARDENS 



are represented in th 

 by such species as A i 

 ptocumbens, Silent 

 AictostapJnjlos alptn 

 fiagti tiiiiUni I 

 vni r s 



p I, 



florui,, lanatu!, and un, 

 i/iatidiflora, Artemisia 

 pma, Senec 



region 



jionica, 

 Saxi 

 hatum, 

 ' ndron 

 imosa. 

 Aster 

 Rooky 



II I and 



nut, Ca 

 inhisa, 

 I Geurn 



vide: fls. white, tinted with crimson, sessile 

 not fragrant, VA in. long. B.M. 2178. -Hybrids with B, 

 coccinea are figured in A.F. 5:433. 



AA. Clusters many-flowered. 



coccinea, DC. (Kalosdnthes coccinea. Haw. Crdssula 

 coccinea, Linn.). Plant robust, shrubby, 1-2 ft. high 

 Ivs. very closely imbricated, 1-lK in. x ?i-l in.: fls 

 bright scarlet, 114.-2 in. long, fragrant, borne in sum 

 mer. Cape. Gn. 46, p. 3G0. B.M. 495. 



i?. falcdta, DC. See Crassula faleata. p^ ^^ Barclay. 



EOCK-BBAKE. See Cnjptogramma. 

 EOCK-CEESS. Arabis. 



EOCK GARDENS. Figs. 2137-40. Nature in time will 

 make a garden even on the unbroken surface of a rock, 

 by clothing it with lichens, algae and mosses of many 

 exquisite forms having much variety an 1 often striking 

 brilliancy in coloring. If there are soil filled cracks and 

 pockets then ferns and flowering plants will find a plice 

 At low elevations, however, these flowering rock plant 

 are comparatively few, for soil accumulates ra] i llv 

 strong-growing herbs, shrubs and trees ai led bj fa 

 able climatic conditions, soon cover the rock siirfa 

 furnish so dense a shade that only mosses lichens 

 ferns will thrive. 



The ideal rock or alpine gardens are withm thit re 

 on mountain summits between the limits of tree gr 

 and the edge of perpetual snow, and m the c irt p 

 ing regions toward the poles, where the pla 

 tected from the rigors of a long winter by 1 I 

 snow and are quickened into a short pen 1 

 growth by a comparatively low summer tei | 

 Here, where there m-r. -l.-.-y., r-....l, m i t ro k 



and pockets filled \vi:li tri m^ cif broken tone 



porous decayed VI -. i : . i : n.- the favoral le 



ditlons wherein til. 1 , nrs in multiply tl 



neat and dainty c-u-lii n-. imi :iiiil r ettes of de 

 and matted foliage and thoir abundance of ex | usiteh 

 formed and brilliantly colored flowers \ s icee full} 

 grown collection of these plants in contnst with ordi 

 nary garden flowers would be like a c Uection of cut 

 gems as compared with one of rough mmer-il an 1 

 rocks, for they have an exquisitene s of tini h an 1 

 depth of coloring that gives them as uni lue a place m 

 the vegetable kingdom as they hove in the plan of na- 

 ture. Surely there are men and women who, if they 

 knew these plants well, would be flred with an ambition 

 to excel in their cultivation; and in so doing they may 

 enter a comparatively untrodden path if they will limit 

 their work chiefly to the alpines of this continent. They 



I C hionophtla 

 lie accounted for 

 t he Current Man 



Th£> 



iti d -Vmeni mjil mts in this class are quite 

 id ittraitne as ire the Europe in species 

 that ha\ e been luus cultivated there Heie alpines have 

 been but little cultn ated \. \ery few easily grown 

 Europem kinds like liihiulia deltoidea, Achillea to 

 mtnto'.ii Cdtiipiiuila Ciijnitua and Aiabis albtda 

 are ofl'ered l>v Amtrican nuiser-ymen and cultivated in 

 the open liordi r On a few private places smiU rock 

 gardens have been established orad\antage has been 

 taken of favorable local conditions to cultivate some 

 additional species, and in one or more botanic gardens 

 considerable collections have been at times maintained, 

 chiefly in frames. Generally what have passed for rock 

 gardens have been rockeries— mere piles of cobbles 

 raised from the surface of turf or piled against dry 

 banks in such a manner as rapidly to disperse instead 

 of slowly conserve all soil moisture. Even the most 



2137. A rocke 



■ bordering a lawn 



self assertive weed fails to thrive in such a garden. A 

 httle letter than this was the rock garden at the 

 Worl 1 s Fair, in which was the alpine plant exhibit 

 of the Royal Botanic Garden of Berlin, comprising 103 

 species, of which only 23 were alive in August. 



In general, we have a smaller rainfall, less humidity 

 and a larger proportion of sunny days than in England, 

 to which we must look for the best instruction in the 

 cultivation of alpine plants. This must be regarded in 



