Aquilaria 



(66 ) 



Arabis 



young plants must be transplanted, when large 

 enough, into separate pots, and grown on until 

 large enough for deeper water. 



A Selection. Hardy aquatics suitable for out- 

 door cultivation, or for a tank in a cold house, or 

 one with a little heat : 



Nymphaeas in great variety, including the several 

 hardy species and the hybrids from France and 

 America. These will be found under the title of 

 the plant in subsequent pages. Nuphar luteum ; 

 N. advena, N. minimum ; Alisma Plantago ; Apono- 

 geton distachyon ; Hottonia palustris ; Limnan- 

 themum nymphoides ; L. peltatum ; Orontium 

 aquaticum ; Stratiotes aloides ; Utricularia vul- 

 garis ; Azolla caroliniana. The curious Trapa 

 natans, like the last named, has floating leaves ; it 

 is not quite hardy, but can be kept in a tub in the 

 greenhouse in winter. 



Of those of a non-floating character there are 

 Acorus Calamus, A. graruineus ; Alisma Plantago ; 

 Butomus umbellatus ; Calla palustris ; Iris Pseuda- 

 corus, I. laevigata, I. aurea, etc. ; Menyanthes tri- 

 foliata ; Peltandra virginica ; Pontederia cordata ; 

 Ranunculus Lingua major ; Sagittaria sagittifolia, 

 S. s. fl. pi., and others ; and Typhas. Richardia 

 africana does in mild localities. 



For the margin in moist soil there are many 

 plants : Acoruses, Arundos, Bambusas, Calthas, 

 Oardamine pratensis fl. pi , Cyperus longus, Gun- 

 neras, Habenarias, Parnassias, Phormiums, Primula 

 rosea, Scirpus, Spiraeas, and many others. 



Aquatics requiring heat comprise such as 

 Aponogeton fenestrale and others of the genus, 

 Cyperuses, Eichorneas, Jussiaaa grandiflora, 

 Limnanthemum indicum, Nelumbiurns, the 

 beautiful tropical Nymphaeas, Salvinia natans, 

 Thalia dealbata, and many more. 



AQUILARIA. 



Two or three trees (ord. Thymeteaceas) requir- 

 ing moist stove treatment. The Eagle-wood of 

 the natives is the heart-wood of malaccensis. 

 Flowers greenish white. Propagation is by im- 

 ported seeds, also by cuttings in sandy soil in a 

 propagating case with plenty of bottom heat. 

 Fibrous loam, with a third part of peat, and plenty 

 of sand to ensure porosity, suits. 



Principal Species : 



malaccensis, <>' to 12' (*?/?*. o'"ta). 



AQUILEGIA. (COLUMBINE.) 



Description. One of the most elegant of border 

 flowers {ord. Ranunculacese), producing graceful, 

 long-spurred flowers on stems rising well above the 

 beautifully-divided leaves. The greater number 

 are hardy, though some, such as cserulea, are not 

 easily grown in every garden. They are very 

 ornamental in beds, borders, and rockeries, and 

 the newer hybrids make fine pot plants. The long 

 spurred hybrids of CEerulea and chrysantha are 

 very handsome, though not so long lived as vul- 

 garis, our common Columbine. 



Propagation. By division or seeds, the latter 

 sometimes germinating very irregularly. Sow 

 under glass as soon as possible after it is ripe. 



Soil. The choicer species like a soil of sandy 

 loam and leaf mould, but the more robust will 

 grow in any common soil. 



Other Cultural Points. While the Columbines 

 like moisture, the position in which they are grown 

 should be properly drained and sunny. They cross 

 freely, and isolation or protection with muslin is 

 necessary if it is intended to keep the offspring pure. 



Principal Species : 



alpina, 1', My., bl. A beautiful plant with large 

 flowers, sometimes both bl. and wh. Rock garden. 



CEerulea, 1J', My., etc., bl., wh. A lovely plant 

 with large flowers having long, slender spurs which 

 are tipped with grn. (syns. leptoceras and 

 macrautha). 



csrulea hybrida. The hybrids of crerulea, chrys- 

 antha, etc., are among the most charming of all 

 Columbines, with their long spurs and varied 

 colours, red, bl., yel., and wh. being represented. 



canadensis, 2', My., etc., sc., yel. A pretty, free- 

 blooming plant of good colour and habit. 



chrysantha, 3J', My., etc., yel. A great garden 

 favourite, though not long-lived in many gardens. 



einseliana, 2J', My., bl. Best known by its 

 var. thalictrifolia. 



formosa, 3', sum., red, yel. A fine border plant 

 with rather short spurs (syns. arctica and cali- 

 fornica). There are a few varieties. 



glandulosa, 1', Je., lil., bl., wh. This is a short- 

 lived plant which should be regularly raised from 

 seed to replace the plants lost. It varies in height 

 and a little in shade. Bicolor, jucunda, longi- 

 calcarata, parviflora, and unicoior are good 

 varieties. 



olympica, My., light bl., wh. A nice species, of 

 which there is a double form. 



pyrenaica, G" to 1', lil. bl. A charming little 

 Alpine species, with flowers large compared with 

 the size of the plant. 



sibirica, 1', sum., pale bl. A neat rock plant 

 (syns. speciosa and garnieriana). 



Skinned, 2', Jy., etc., yel., grn., red. A pleasing 

 species. 



Stuarti, 9", Je., dark bl., wh. A lovely hybrid 

 between glandulosa and vulgaris wittmanniana. 

 Should be treated as a bien. in most gardens. 

 Raised by Dr. Stuart, Chirnsicle. 



vulgaris, 3' and upwards, My., etc., various. An 

 old, well-known garden plant with many varieties, 

 single and double. 



Other Species : 



Bertolonii, 1', glauca, 2', Je., parviflora, 1', Je., 



Jy., bl. blush. bl. 



flabellata, 1', lougissiina, 4', viridiflora, l',My., 



Je., wh. Jy. , yel. grn. 



fragraiis, 6', moorcroftiaua, 1', 



My., yel. My., bl., wh. 



ARABIS. (WALL CBESS. ROCK CKESS). 



Description. A large genus of plants {Ord. 

 Cruciferae) of which a considerable number are of 

 much value in the garden, although many are of a 

 weedy and unornamental character. They are 

 generally of a trailing or creeping habit, and are 

 thus well suited for rockwork. edgings, or small 

 flower beds. The flowers are in clusters. Some 

 of the variegated - leaved varieties are greatly 

 appreciated. 



Propagation. All the species may be propagated 

 by division, or by cuttings taken off after flower- 

 ing and put in light soil under a handlight or frame 

 and shaded until rooted. All, except the varie- 

 gated forms and the double flowered variety of 

 alpina, are readily raised from seeds sown under 

 glass or in the open in spring. 



Soil. Arabises, as a rule, prefer a light and 

 rather dry soil. Lucida and its variegated form, 

 however, like a strong and rather damp soil. 



Other Cultural Points. They look best on a 

 rockery, or as an edging, and require little atten- 

 tion in the way of manure. It is desirable, if 



