TELLOW VETCHLI>'G. 



343 



which require protection in this 

 country ; and which are not worth 

 the trouble of growing. 



XiMENE^siA. — Composite. — An- 

 nual and perennial plants, natives 

 of Mexico, with yellow flowers, 

 ■which will grow in any common 

 garden soil . There are two biennial 

 species, which should be kept in a 

 frame during winter, and trans- 

 planted to the open border in 

 spring. 



Xtlo^bium. — OrchidacecE. — Bra- 

 zilian parasites, growing on trees, 

 and requiring a stove in England. — 

 For their culture, see Orchideous 

 Epiphytes. 



Xylopht'lla. — Euphorhlacece. 

 — Very curious shrubs, which pro- 

 duce their flowers on the margins of 

 their leaves. They are mostly natives 

 of Jamaica, and require a stove in 

 England. The flov>-ers are generally 

 greenish, but those of X montdna, 

 the Sea-Side Laurel, are of a bright 

 yellow. They are generally grown 

 in sandy peat. 



Xylo'steum. — The Fly Honey- 

 suckle.— See LONl'CERA. 



XT" AM. — Dioscorea. — Herbaceous 

 -'- plants, natives of the tropics, 

 generally with greenish-white flowers, 

 the tuberous roots of which are 

 eaten as a substitute for Potatoes. 

 The stems of most of the species 

 are vv^eak, and cannot support them- 

 selves. 



Yarrow. — A chillea MillefdUum. 



Yellow Rattle. — Rhindnthus 

 major. — A British plant, which is 

 very ornamental, from its yellow | 

 labiate flowers having each a bright j 

 dark eye. 



Yellow Root. — See Xantho- 



RHl'ZA. i 



Yellow Sultan. — See Amber- } 



BO^A. I 



Yellow Vetchlixg. — Ldthyrus \ 



FIG. 60.— YD'CCA DKACO'KIS. 



commonest kinds in British gar- 

 dens are Y. gloriosa, Y. draconis, 

 and Y. filamentosa. All these are 

 natives of North America, and are 

 quite hardy in Britain ; they have 

 all white flowers, and they are Aloe- 

 like slu-ubs, presenting the general 



J. 'pAaca.— A British climbing Yetcb, 

 with yellow flowers, only found in 

 sandy soils. 



Yellow Wort. — Clddra perfo- 

 lidta. — A British annual, wdth 

 glaucous leaves and yellow flowers. 

 It is always found in a wild state in 

 chalky soils, and it will seldom grow 

 in gardens unless the soil be chalky, 

 or of a calcareous loam. 



Yew Tree. — See Ta'xus. 



Yucca. — Liliacece, or Tidipdcece. 

 — Adam' s Needle. —Evergreen plants 

 with leaves like the Aloe, and some- 

 times a stem, or rather trunk, like 

 a Palm-tree. Some of the species 

 have been known to have a trunk 

 twenty feet high, sending up, every 

 year, five or six immense flower- 

 stems, each six or eight feet high. 

 In ordinary cases, however, the 

 trunk is rarely more than two or 

 three feet high, though the flower- 

 stem frequently measures five or 

 six feet. The flowers are bell- 

 shaped, and generally white. The 



