Sisymbrium 



( 339 ) 



Skimmia 



Fir, although it does not confine its ravages 

 thereto; and gigas, the Giant Sirex, which 

 lives in the Spruce, Silver Firs, and Larches. 

 (juras is- black, ringed with yellow, while juvencus 

 is almost uniformly dark steel blue, although parts 

 of the male are dull red. The timber of infected 

 trees is of little value, and thus destruction by fire 

 is to be recommended. No dead branches should 

 be allowed to remain lying on the ground. 



SISYMBRIUM. (HEDGE MUSTARD.) 

 Hardy herbs, principally annuals or biennials 



(ord. Cruciferte), of practically no value for the 



garden. 



junceum, 9", Je., hlf- 

 hdy., lil. 



chileuse, 6" to 12", Jy., 



hlf-hdy., pur. 

 filifolium, 6 to 8", My., 



hlf-hdy. or hdy., wh. 



SITONA. 



A genus of small beetles (Weevils'), the most 

 notable species of which are crinita, the Spotted 

 Pea Weevil, and lineata, the Striped Pea YVeevil, 

 attacking Leguminous plants. The latter is striped 

 dark and light yellow, while the former is grey and 

 rose with dark spots. The limbs in both species 

 are dull red. The beetles feed upon the leaves, 

 and the larvae attack the roots of the plants, so 



A MODERN SlNNINGIA (POPULARLY GLOXINIA) TWO YEARS FROM SEED SOWING 

 (see p. 338, and also p. 374, VOL. I.). 



SISYRINCHIUM (syn. SOUZA. BLUE- 

 EYED GRASS, SATIN FLOWER, KUSH LILY, 

 PIG ROOT.) 



A genus of hardy or half-hardy perennials (ord. 

 Iridesc), some of which are of considerable beauty 

 in the border, rock garden, frame, or greenhouse. 

 Grandiflorum is one of the prettiest of early 

 flowers. Propagation, by seeds sown when ripe or 

 in spring, and by offsets. Soil, sandy loam, with 

 leaf soil or peat. 



Principal Species and Varieties : 



angustifnlium, 6" to 9", 



sum., hdy.. pale bl. 

 - anceps, 6", sum., bl. 

 Other vars. are mu- 



cronatum and Nuttallii. 

 grandiflorum, 8" to 12", 



Other Species : 



bermudiana, It' to 2', 

 sum., hdy., 1>T. 



spr., hdy., 



Douglasii). 



Bell. 



album, wh. 

 striatum, 1' to 3', 



hdy., yel. 



pur. (//>' 

 Spring 



californicum, 1' to2',aut., 

 hlf-hdy. or hdy., yel. 



!<irrnxl I/I'IK (xee HtTraxtylis). 

 ,">'/.ixj Wood (see Dalbergia). 

 Sitolobium (see IHchsonia). 



that these Sitonas are very injurious in both stages. 

 It is a good plan to encourage the young seedlings 

 to grow quickly into the rough leaf stage. Applica- 

 tions of lime and soot (which see) to the soil in 

 autumn are excellent. Watering with petroleum, 

 2 oz. to 1 gallon of water, has also proved effica- 

 cious. 



SIUM. (WATER PARSNIP.) 



Glabrous hardy herbs (ord. Umbelliferae) of no 

 garden value. The Skirret is Sisarum. Erectum 

 (yn. angustifolium) and latifolium are common 

 British ditch weeds. 



SKIMMIA. 



Ornamental hardy evergreen shrubs (ord. Ruta- 

 ceae) with whitish (lowers, followed by berries, in 

 some cases of considerable beauty, but said to be 

 hurtful if eaten. These shrubs are worthy of being 

 more largely grown. Propagation, by seeds, sown 

 when ripe in peat, loam, and sand ; and by cuttings 

 under a bell-glass, in heat, and in sand or very 

 sandy loam. Soil, peat and loam. It is essen- 

 tial that both male and female plants should 

 be planted for the production of berries. 



