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CASSELL'S POPULAR GARDENING. 



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

 Lip roundish-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. 



W. quadrat a. — 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. Ocana. 



W. Wailesiana. — 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 the base, delicate violet along the 

 centre ; the crest at the base consists of fine violet 

 longitudinal tubercles, which are only attached at 

 the base. Spring months. Brazil. 



Warscewiczella. — A small genus named in 

 honour of M. Warscewicz, a celebrated botanical 

 collector ; they are very nearly allied to Warrea, and 

 require the same treatment. Brazilian House. 



W. marginata. — This is a handsome plant, quite 

 destitute of pseudo-bulbs, but producing broad, 

 strongly-ribbed leaves, which imbricate at the base. 

 Peduncle one-flowered, shorter than the leaves. 

 Sepals and petals all turned back, pure white, 

 tinged with straw-colour in some varieties. Lip 

 large, spread wide open, rolled over the column at 

 the base, pale yellow, with an uninterrupted broad 

 marginal border of rich crimson. It blooms at 

 various seasons. New Grenada. 



Zygopetalum. — A somewhat extensive family, 

 containing numerous very handsome species. The 

 name is derived from zygos, " a yoke," and petalon, 

 and refers to the peculiar joining together of the 

 sepals and petals at the base. 



These plants should be potted in rough peat 

 and sphagnum moss ; they should be thoroughly 

 well drained, as they enjoy an abundant supply of 

 water during the growing season ; when this is 

 completed very little will suffice, as their large and 

 stout pseudo-bulbs enable them to withstand drought 

 with impunity. Brazilian House. 



Z. aromaticum. — This species is less robust than 

 the others ; the flowers 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. Mackaii. — pseudo-bulbs large and ovate, bear- 

 ing numerous long strap-shaped leaves, which are 

 strongly ribbed and deep green. Scape erect and 

 many-flowered. Sepals and petals green, trans- 

 versely barred with brown. Lip large and spreading, 

 lilac, streaked and netted with lines of blue. The 

 variety crinitum 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 beauty. 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 fleshy, deep rich blue. 

 Winter and spring months. Brazil. 



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 AM) SHEUBS. 



By George 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. C. alnifolia 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 in peaty soil. 



Colutea arboreseens— the Bladder Senna of 

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

 nate leaves and yellow Pea- shaped flowers, followed 

 by large bladder-like pods. C. cruenta 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. Jlorida, one of the North 

 American species, is very beautiful when in flower, 

 by reason of the very large pure white bracts. C. 

 mas, the Cornelian Cherry, has small clustered 

 yellow flowers, which open from February to April, 



