In its habit this plant resembles somewhat the _Pelargonium cordifolium_, is a native of the Cape, flowers from May to September, in favourable seasons has produced seeds here, but is more usually increased by cuttings. Varies with petals of a rich purple colour, in which the spots are similar, though not so conspicuous. [310] Erinus Alpinus. Alpine Erinus. _Class and Order._ Didynamia Angiospermia. _Generic Character._ _Cal._ 5-phyllus. _Cor._ Limbus 5-fidus aequalis. _Caps._ 2-locularis. _Specific Character and Synonyms._ ERINUS _alpinus_ floribus racemosis, foliis spathulatis. _Linn. Syst. Vegetab. ed. 14._ _Murr. p. 570._ _Ait. Kew. v. 2. p. 357._ AGERATUM serratum alpinum. _Bauh. pin. 221._ [Illustration: N^o. 310] The _Erinus alpinus_ is a native of Switzerland, Germany, and France; inhabiting the more mountainous parts of those countries. It is a very desirable little plant for the decoration of rock work, growing in close tufts, and producing numerous flowers of a lively purple colour during most of the summer months. Is increased without difficulty by parting its roots in Autumn, or from seed; in the winter some plants of it should be kept in pots under a frame or hand-glass, as it is liable to be injured by wet and frost. Was cultivated here by Mr. Miller in 1759. [311] Robinia Hispida. Rough-Stalk'd Robinia, or Rose Acacia. _Class and Order._ Diadelphia Decandria. _Generic Character._ _Cal._ 4-fidus. Legumen gibbum elongatum. _Specific Character and Synonyms._ ROBINIA _hispida_ racemis axillaribus, foliis impari pinnatis, caule inermi hispido. _Linn. Mant. p. 668. Ait. Kew. v. 3. p. 53._ ROBINIA racemis axillaribus, pedicellis unifloris, foliis impari pinnatis, caule inermi. _Jacq. Amer. 211. t. 179. f. 101._ PSEUDO ACACIA hispida floribus roseis. _Catesb. Carol. 3. p. 20. t. 20._ [Illustration: N^o. 311] There are few trees or shrubs which have contributed more to adorn our plantations, and shrubberies, than those of this genus, nine species of which are enumerated in the _Hort. Kew._ of Mr. Aiton, most of these are natives either of North-America, or Siberia: the present species, an inhabitant of Carolina, is perhaps the most ornamental of the whole: its large pendant bunches of rose-coloured flowers load the branches in May and June, and sometimes a second crop will be produced late in the season, these with us usually fall off without producing any seed-vessels.