ROSE 



ROTHROCKIA 



1577 



make its appearance, sulfur on the heatiiifz; 

 pipes is the best remedy that can be applied. 

 Red spider also will become ti-oublesome if 

 the plants are allowed to get dry in any spots, 

 or too high a temperature is carried. This can 

 be avoided by liberal syringing on all bright 

 days, thoroughly soaking the under side of 

 all the foliage. 



If the greenhouses are constructed to grow 

 plants on the solid bed instead of raised 

 benches, the same method of cultivation 

 should be followed and not more than 5 or 6 

 inches of soil should be used on the surface; 

 have a thoroughly drained border ; in all 

 other respects cultivation would be the same 

 as for bench system. After the plants get 

 into thorough, strong, vigorous growth and 

 producing abundance of flowers, say from 

 Christmas onwards, a mulching of well-de- 

 composed manure every five or six weeks in 

 very limited quantities will be beneficial, and 

 if the plants have made extra strong growth 

 and all the soil is occupied with roots in the 

 benches towards the end of February, liquid 

 manure can be applied once in very three or 

 four weeks with considerable benefit. This 

 treatment should carry the plants success- 

 fully through to the end of their blooming 

 season. 



If the plants are kept in good, healthy, vig- 

 orous condition they could be carried through 

 for a second season's work if necessary. To 

 do this it would be necessary to dry them off 

 somewhat, say through July and part of Au- 

 gust for four to six weeks, so as to ripen the 

 wood thoroughly without wilting the leaves 

 completely. Then they could be pruned back 

 to good, sound, plump eyes at the base of the 

 strong shoots and all the small spray growth 

 cut out. Then the plants can be lifted with 

 a good ball of earth, so as to save as much of 

 the roots as possible, replanted into new 

 soil, and practically treated the same as 

 young stock. 



If grafted stock is preferred instead of 

 own-root cuttings as above described, they 

 can be treated according to regular instruc- 

 tions given by many authorities on grafting. Cultiva- 

 tion of these is in all respects identical with the above, 

 except as to the rooting of the cuttings. 



John N. May. 



ROSE ACACIA. BoUnia hispida. 



ROSE APPLE. Eugenia Jamhos. 



ROSEBAY. Same as Oleander. SeeiVermw.. Epilo- 

 hium (nig usti folium is sometimes called Rosehay. 



ROSE CAMPION. Lyclmis Coronaria. 



ROSE, CHRISTMAS. Hellehorus niger. 



ROSE, JAPANESE. Kerria Japonica. 



ROSE MALLOW. Hibiscus. 



ROSEMARY or OLD MAN. See Rosmarinus. 



ROSE OF CHINA. Hibiscus Bosa-Sinensis. 



ROSE OF HEAVEN. Lychnis Cceli-rosa. 



ROSE -OF -JERICHO 



See Be.si(rrectioii Plants. 



is Anasfafica Hierochuntica. 



ROSE OF SHARON. Hibiscus Syriacus. 

 ROSE, ROCK. Cisius and Helianthemiim. 

 ROSE, SUN. Helianthemum. 



ROSIN PLANT. 

 ROSIN WEED. 



Silphium. 



Silphium laciniatum. 



2190. A forcing Tea Rose — Mrs. W. C. Whitney (X %). 



ROSMARINUS (Latin, sea-dew; the plant is common 

 on the chalk hills of the south of France and near the 

 seacoast). Labidkv. Rosemary is a nearly hardy sub- 

 shrub, with aromatic leaves which are used for season- 

 ing. It has small, light blue flowers, which are much 

 sought for by bees. Oil of Rosemary is a common 

 preparation in drug stores. It is a volatile oil distilled 

 from the leaves. The Ivs. are also used in making Hun- 

 gary water. In northern herb gardens it lasts for years 

 if given well-drained soil and some winter protection. 

 Franceschi recommends it for hedges in S. Calif., espe- 

 cially for dry and rocky places near the coast. 



Generic characters: calyx 2-lipped; posterior lip con- 

 cave, minutely 3-toothed; anterior 2-cut; corolla with 

 posterior lip erect, emarginate, anterior lip spreading, 

 3-cut, the middle lobe longest, concave, declined: per- 

 fect stamens 2 ; style 2-cut at apex. The genus is 

 placed near Salvia, being distinguished by the calyx 

 being only shortly 2-lipped, not hairy in the throat and 

 the connective of the anthers continuous with the fila- 

 ment and indicated only by a slender reflexed tooth. 



officinalis, Linn. Rosemary. Old Man. Shrub, 

 2-4 ft. high: Ivs. numerous, linear, with revolute mar- 

 gins : fls. axillary, in short racemes, borne in early 

 spring. Mediterranean region. V. 3:61. W. M. 



ROTHROCKIA (Prof. J. T. Rothrock, head of Pennsyl- 

 vania forestry dept., and author of the botanical part 

 of Wheeler's U. S. geological surveys of the region in 

 which the plant was discovered). Asclepiaddcew. A 

 genus of a single species, a perennial herb, with some- 

 what woody stems, spreading and twining: Ivs. woolly: 

 fls. in loose racemes, in axils of the Ivs.: follicles 4—5 

 in. long, glabrous, fusiform, often used as a vegetable 

 where native: corolla rotate, deeply 5-cleft; crown sim- 

 ple, inserted at the junction of corolla and stamen-tube, 



