ROCK- GARDEN 



2969 



When all danger of frost is past, set them outdoors on a 

 bed of ashes in the full sun, making some provision to 

 protect them from rainstorms, so as to prevent water 

 lodging in the points of the shoots, which is liable to 

 bring about conditions favorable to disease. Toward 

 the end of September, have the plants housed in their 

 winter quarters; all that is necessary during the winter 

 is to keep them from freezing. In spring, the points of 

 the shoots may be cut out again, to encourage more 

 breaks and soon after they may receive another shift. 

 Treat them as advised above, and when the pots are 

 well filled with roots, they may be watered with manure- 

 water as advised for ixoras. Rocheas may be flowered 

 the second summer after the cuttings are struck, and 

 after flowering the plants may be cut back to 6 inches 

 above the pot. These cut-back plants may be shifted 

 along, after they break, and be grown into large speci- 

 mens. Fine plants of rochea may also be grown in the 

 following manner: Take a 10- or 12-inch pot, and fill it 

 with the compost advised above, the last 2 inches being 

 pure sand. Insert the cuttings as thick as they can be 

 pricked into the pot. The cuttings may be secured from 

 a plant that has flowered. Breaks will start all over the 

 stems of such plants, and in the fall after flowering 

 they will be large enough to use for cuttings. In 

 eighteen months this pot of cuttings will come in flower 

 and will have more than doubled the number of shoots. 

 Aphides are the only insect pest that molest the 

 rocheas, and these may be destroyed by fumigating 

 with tobacco in some of its forms. These plants require 

 at all times abundance of fresh air, and if this is 

 not given, they will be attacked by fungous disease. 

 (George F. Stewart.) 



A. Clusters usually 2-fld. 



jasminea, DC. (Crassula jasminea, Ker-Gawl). St. 

 subshrubby, -4-12 in. high, decumbent, branched, flower- 

 ing part erect: Ivs. fleshy, oblong-oval or spatulate, 

 ; in. long: fls. white, tinted with crimson, sessile, 

 not fragrant, \\fi in. long. Cape B.M. 2178. L.B.C. 

 11 : 1040. Hvbrids with R. coccinea are figured in A.F. 

 5:433. 



AA. Clusters many-fld. 



coccinea, DC. (Kalosdnthes coccinea, Haw. Crassula 

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

 Ivs. very closely imbricated, ovate-oblong or ovate, 

 1-1 1 2X 3 4 -1 in.: fls. bright scarlet, lJi-2 in. long, 

 fragrant, borne in summer. Cape. Gn. 46, p. 360. 

 B.M. 495. Showy; hybrids are in cult. 



R. falcata, DC.=Crassula falcata. R. hybrida aUriflAra is said 

 to be a hybrid between R. jasminea and R. odoratissirna. R. 

 odoratiftima, D.C. Somewhat shrubby, 12-20 in.: Ivg. connate, 

 erect-spreading, linear-lanceolate or subulate: fls. 1 in. long, fragrant, 

 pale yellow or cream-colored. Cape. -r TI T3 f 



ROCK-GARDEN. An ornamental planting in very 

 rocky places or in areas on which rocks have been placed 

 for the particular purpose to make congenial conditions 

 for certain classes of plants and also to lend interest 

 and variety to a part of the grounds; a rockery. Figs. 

 3415-3419" See, also, Alpine Plants, Vol. I. 



Nature in time will make a garden even on the 

 broken surface of a rock, by clothing it with lichens, 

 algae, and mosses of many exquisite forms having much 

 variety and often striking brilliancy in coloring. If 

 there are soil-filled cracks and pockets, then ferns and 

 flowering plants will find a place. At low elevations, 

 however, these flowering rock-plants are comparatively 

 few, for soil accumulates rapidly and strong-growing 

 herbs, shrubs, and trees, aided by favorable climatic con- 

 ditions, soon cover the rock surface or furnish so dense 

 a shade that only mosses, lichens, and ferns will thrive. 



The ideal rock- or alpine gardens are within that 

 region on mountain summits between the limits of 

 tree-growth and the edge of perpetual snow, and in the 

 corresponding regions toward the poles, where the 

 plants are protected from the rigors of a long winter by 



blankets of snow and are quickened into a short period 

 of rapid growth by a comparatively low summer tem- 

 perature. Here, where there are deep cool moist rock- 

 crevices and pockets filled with fragments of broken 

 stone and porous decayed vegetable matter, are the 

 favorable conditions wherein the real alpine plants can 

 multiply their neat and dainty cushions, tufts, and 

 rosettes of dense and matted foliage and their abun- 

 dance of exquisitely formed and brilliantly colored 

 flowers. A successfully grown collection of these plants 

 in contrast with ordinary garden flowers would be like a 

 collection of cut gems as compared with one of rough 

 minerals and rocks, for they have an exquisiteness of 

 finish and depth of coloring that gives them as unique 

 a place in the vegetable kingdom as they have in the 

 plan of nature. Surely there are men and women who, 

 if they knew these plants well, would be fired 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 are represented in the New Eng- 

 land mountain region by such species as Arenaria 

 grcEnlandica, Loiseleuria procumbens, Silene acaulis, 

 Diapensia lapponica, Arctous alpina, Vaccinium 

 csespitosum, Saxifraga Aizoon var. rivularis, Veronica 

 alpina, Geum radiatum var. Pechii, Sibbaldia procum- 

 bens, Rhododendron lapponicum, Phyttodoce C3erulea, 

 Primula farinosa, Saxifraga oppositifolia, S. Aizoon, 

 and S. aizoides, Aster polyphyllus, and Woodsia gla- 

 bella; and in the Rocky Mountains and Pacific Coast 

 ranges by Erigeron uniflorus, E. lanatus, and E. 

 ur sinus, Actinella Brandegei and A. grandiflora, 

 Artemisia borealis, A. scopulorum, and A. alpina, 

 Senecio Soldanella, S. Fremontii, S. petrxus, S. uni- 

 florus, and S. werneriaefolius, Crepis nana, Campanula 

 uniflora, Primula Parryi and P. suffruiicosa, Androsace 

 Chamsejasme and A. septentrionalis, Gentiana prostraia, 

 G. frigtda, G. Newberryi, G. Parryi, and G. simplex, 

 Phlox bryoides and P. csespitosa, Polemonium confertum, 

 Cassiope Meriensiana, Phyttodoce Breweri, Draba 

 streptocarpa, D. Parryi, and D. nudicaulis, Arabia 

 Lyollii and A. plotysperma, Smelowskia calycina, 



*\ - - 



3415. A rock-garden bordering a lawn. 



Lychnis montana and L. Kingii, Calandrinia pygm&a, 

 Claytonia, megarrhiza, Spraguea umbellata, Dryas 

 octopetala, Geum Rossii, Saxifraga chrysantha and S. 

 bryophora, Cystopteris alpina, Aplopappus pygmaeus, 

 A. Lyollii, and A. acaulis, Omphalodes nana var. 

 aretioides, Chionophila Jamesii, and so on. (Not all of 

 these names are accounted for in this work. They may 

 be found in the current manuals of North American 

 plants.) 



The uncultivated American plants in this class are 

 quite as numerous and attractive as are the European 



