138 



CASSELL'S POPULAR GAEDENING. 



of pure blue in it. Sepals and petals pure white. 

 Lip roundiah-apiculate, deep blue. Summer months. 

 Columbia. 



W. discolor. — Leaves narrower than is usual in 

 these plants. Peduncle supporting a solitary flower. 

 Sepals and petals white, tinged with purple, the 

 latter being broader. Lip convolute, deep purple on 

 the disc, passing into white on the margin, raised 

 crest at the base white. Spring months. Central 

 America. (Now Zygopetalum discolor.) 



W. quadrata. — Peduncle one-flowered. Sepals 

 oblong-ovate, pale yellow, tipped with green ; petals 

 same size, clear yellow. Lip rolled over the column, 

 spreading in front, purple in the centre, toothed at 

 the base, where it is tinged with violet. Summer 

 months. Ooana. (Now Zygopetalum marginatum.) 



W. WaiUsiana. — This species is one-flowered, with 

 the fragrance of the Sweet Pea. Sepals and petals 

 cream-colour. Lip roundish in front, somewhat 

 wedge-shaped at base, delicate violet along centre ; 

 crest at the base consists of fine violet longitudinal 

 tubercles, which are only attached at base. Spring 

 months. Brazil. (Now Zygopetahi/m Wailesiamim.) 



Zygopetalum. — A somewhat extensive family, 

 containing numerous very handsome species, includ- 

 ing some lately removed from Warrea, as above. 

 The name is derived from zt/gos, "a yoke," and 

 petalon, and refers to the peculiar joining together 

 of the sepals and petals at the base. 



These plants should he potted in rough peat and 

 sphagnum moss; they should be thoroughly weU 

 drained, as they enjoy an abundant supply of water 

 during the growing season ; when this is completed 

 very little wiU suffice, as their large and stout 

 pseudo-bulbs enable them to withstand drought with 

 impunity. Brazilian House. 



Not a few cultivators, however, grow these plants 

 well in a mixture of leaf -mould, peat, and loam, in about 

 equal proportions. Charcoal for drainage, and also 

 more or less of it added to the soil, adds much to the 

 porosity and sweetness of the mixture. But in fact 

 these useful and fine winter blooming Orchids are by 

 no means particular as to soil, and provided the 

 drainage is perfect they will thrive and bloom 

 almost equally well in turfy loam, leaf-mould, or 

 ■fibrous peat, the most useful species of all, Maelcayi 

 and its varieties, often blooming freely in fibrous 

 loam, or the common compound of peat and loam 

 generally used for the usual run of stove plants or 

 the hardier terrestrial Orchids. 



Z. aromatieum. — This species is less robust than 

 the others ; the fiowers measure about four inches 

 across. Sepals and petals oblong-acute, the former 

 the larger, pale green. Lip large and flat, cordate 

 in front, crenate on the edge, centre deep blue, 



with a broad white margin, crested at the base. 

 "Winter months. Central America. 



Z. Machayi. — ^pseudo-bulbs large and ovate, bear- 

 ing numerous long strap-shaped leaves, which are 

 strongly ribbed and deep green. Scape erect and 

 many-fiowered. Sepals and petals green, trans- 

 versely barred with brown. Lip large and spreading, 

 Ulac, streaked and netted with lines of blue. The 

 variety erinitum is a dwarfer plant, with flowers 

 equally large, but slightly paler, and fringed with 

 numerous black tubercles. Autumn and winter 

 months, lasting long in full beaut}'. Brazil. 



Z. maxillare. — This species thrives admirably on 

 the stem of a Tree Fern, and when thus treated 

 displays its beauty to the greatest advantage. Stem 

 ascending; the pseudo-bulbs are somewhat small, 

 indeed the whole plant is dwarf. Sepals and petals 

 yellowish-green, and stained with brown towards 

 the base. Lip thick and flesh)-, deep rich blue. 

 Winter and spring months. BrazU. 



Z. rostratum. — Whole plant dwarf, flower large. 

 Sepals and petals yellowish-green. Lip large and 

 spreading, upwards of two inches across, white, 

 streaked and lined with rosy-pink. Autumn and 

 spring months. Demerara. 



TEEES AJSTD SHEUBS. 



Bt Geokge Nicholson. 



Clethra — the Sweet Pepper-bush, or White 

 Alder of the North-eastern United States — is repre- 

 sented in British gardens by a couple of handsome, 

 hardy, deciduous species. 0. alnifoUa has upright 

 panicled racemes of handsome fragrant white flowers ; 

 it forms a shrub three to ten feet high. C. acuminata 

 has solitary drooping racemes, and is a taller plant, 

 sometimes attaining tree stature. Both like a damp 

 spot iu peaty soil. 



Colutea arboresoens — the Bladder Senna of 

 Southern Europe, &c. — is a deciduous shrub, vrith pin- 

 nate leaves and yellow Pea-shaped flowers, followed 

 by large bladder-like pods. C. eruenta is a similar 

 plant, with reddish-tinted flowers. Both are quick- 

 growing, and succeed well in dry gravelly spots, or 

 on banks where few other shrubs would thrive. 



Cornus. — There are about twenty-five species of 

 the genus Cornus, all natives of north temperate and 

 sub-tropical regions. C. flm-ida, one of the North 

 American species, is very beautiful when in flower, 

 by reason of the very large pirre white bracts. C 

 mas; the Cornelian Cherrj--, has small clustered 

 yellow fiowers, which open from February to Aprilj 



