Hydrophyllacece Whitlavia. 315 



having purple, blue or pink flowers. E. Ortgiesiana, is a 

 recently introduced perennial species of trailing habit with 

 purple and white flowers. 



3. WHITLAVIA. 



Dwarf branching glandular pubescent annuals with simple 

 petiolate leaves and large campanulate racemose flowers. Calyx 

 deeply 5-partite. Corolla tubular - campanulate, inflated at 

 the base. Stamens exceeding the corolla ; filaments with an 

 appendage at the base. Capsule many-seeded. Named .in 

 honour of Francis Whitla, a patron of botany. 



1. W. grandiflora. This is a very showy plant with large 

 deep blue Campanula-like flowers and deltoid or oblong 

 coarsely-toothed hispid leaves. A native of California. 



4. WIGlNDIA. 



Tall hispid herbaceous plants, remarkable for their large 

 bold foliage. Leaves alternate, simple, more or less toothed or 

 lobed, becoming gradually smaller upwards. Flowers in gyrate 

 cymes, resembling those of Eutoca, in structure. The few 

 species known are natives of tropical America, and, therefore, 

 only available for Summer decoration. This genus was named 

 in honour of Wigand, formerly Bishop of Pomerania. 



1. W. Caracasana. A magnificent plant attaining a height 

 of 6 to 12 feet or more, densely clothed with broad oval leaves, 

 the lower ones from 2 to 3 feet long. 



W. wrens and W. Vigieri have likewise very large ornamental 

 foliage, but the former is clothed with virulent stinging hairs. 



ORDER LXXIV. CONVOLVULACEJE. 



Twining or trailing herbs, rarely shrubs or trees. Leaves alter- 

 nate, entire or lobate. Flowers in axillary or terminal racemes 

 or solitary. Calyx of 5 equal or unequal persistent imbricate 

 sepals. Corolla hypogynous, regular, salver-shaped or tubular, 

 5-lobed or nearly entire, plaited, convolute or twisted in bud. 

 Stamens 5, inserted on the corolla-tube ; filaments often dilated 

 at the base. Capsule 1-to 4-celled, few-seeded. A large order 

 of highly ornamental plants, chiefly natives of tropical countries- 

 There are 40 genera and about 650 species. The curious 

 leafless genus Cuscuta is referred here. The species are annual 



