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ARBORETUM AND FRUTICETUM.

PART III.

Celsla. lanata Jac., Bot. Reg., t. 438., and our Jig.

1126., is a suffruticose plant of uncertain origin, butwith showy yellow flowers, which it produces fromJuly to September, it is commonly kept in a frame,but would thrive well on conservative rockwork, in afavourable situation.

Capriiria lanceoluta L.; Frcelfma salicifblia Bot.

Mag., t. 1556. ; is a native of the Cape of Good Hope ,introduced in 1774. A plant has stood against the wallin the Chelsea Botanic, Garden for several years ;and, though it is generally klled down to the groundin winter, it has always hitherto sprung up again inspring, and made a much finer appearance than itcould possibly have done in a pot.

The genera Aionsd a R. et P., Angelbnia H. B. etKunth, Lophosptrmum Don, Rhodochiton Zucc., Nyc-terinia D.Don, all contain species which might be triedagainst a conservative wall in the south of England.

If, after perusing what is stated in this work respecting the half-hardy ligneousplants of any order or tribe, the reader will turn to the same natural order or tribein our Hort. Brit., he will generally find a number of other species, green-house or stove plants, andsuffruticose or completely ligneous, from which he may increase his selection for trial in the open air.

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CHAP. LXXXVI.

OF THE HARDY LIGNEOUS PLANTS OF THE ORDER LABIA'CEiE .

Almost the whole of the plants of this order, which are technically ligneousor suffruticose, may be more properly treated, in gardens, as herbaceous plants

than as shrubs; nevertheless, asIII .) < this work would be incompletewithout noticing them, we shailname some of the principal species,and refer for the remainder toour Hortus Brttannicus. The bestsituation for a collection of lig-neous Labiaceae , is on dry rock-_ work.

Satureja montana L., FI. Greec. t. 543., and ouryfjg. 1131., is a well-knownculinary herb, a native of the south of Europe , which, on dry calcareous soil,will form a neat little evergreen bush,from 1 ft. to 2 ft. in height. S.capitata Willd., a native of the Le-vant, is equally hardy, and, indeed,appears to be only a variety of theformer. There are, also, some speciesor varieties from Sicily , Candia, and Usthe Ionian Islands, which are con-sidered as frame plants, and maybe tried on conservative rockwork.

T hynius vulgaris L., and ourJig. 1132., forms a neat little ever-green shrub, when kept in dry cal-careous soil, or on rockwork : andT. grandiflorus Hort. ; T. Masti-china L., Black., t. 134.; is a nativeof Spain , with hoary, hairy calyxes.

In an arboretum where every singlespecies or variety is to be exhibitedby itself, such a beautiful and fragrant genus as Thymus may have a small cone or hemisphere of rockwork devoted to each speciesor variety. There are some half-hardy species, which might also be tried.They are not only beautiful when in flower, but are highly fragrant, andattractive to bees.

H yssopus crficmdlish., and our Jig. 1133., forms an undefshrub of 2 ft. in

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