AN ENCYCLOPEDIA OF HORTICULTURE. 



Acacia continued. 



pairs of pinnae, each pinna bearing fifteen to eighteen pairs of 

 oblong-linear, obtuse, glabrous leaflets ; branches white ; prickles 

 sometimes wanting, h. 20it Arabia. 1823. Stove species. 



A. settgera (bristly). Synonymous with A. Riceana. 



A. sophoraa (Sophora-podded). fl. yellow ; spikes usually twin, 

 axillary. May. L. phyllodia obovate, oblong or lanceolate, quite 

 entire, many nerved ; sometimes there are bipinnate leaves at the 

 tops of the branches, h. 20ft New Holland, 1805. 



A. sphSBTOcephala (round-headed).* f.. yellow; racemes axillary, 

 usually twin, ovate-roundish. I. with numerous close-set linear 

 falcate pinnules, which are usually tipped by a glandular yellow 

 "food body;" spines twin, hollow. Mexico. A very remarkable 

 stove species, inhabited by ants during certain seasons in its 

 native country. 



A. nncinifolia (hook-leaved). . yellow ; spikes usually twin, 

 dense, on short peduncles, cylindrical March. L phyllodia long, 

 linear-subulate, flat, recurred, mncronate, three-nerved; branches 

 angular, h. 6ft Swan River, 1846. 



A. vera (true). Egyptian Thorn ; Gum Arabic, jl white, usually 

 in twin heads, pedunculate, axillary. July. L with two 

 pairs of pinnae, each pinna bearing eight to ten pairs of 

 oblong linear leaflets ; branches and spines red. h. 20ft Egypt, 



FIG. 5. FLOWERING BRANCH OF ACACIA RICEAM. 



A. verticillata (whorl-leaved).* ft. yellow ; spikes axillary, soli- 

 tary, oblong. March. L phyllodia linear, ending in a pungent 

 somewhat verticillately. h, 6ft to 10ft A 



ending in a 

 . h, 6ft to 

 ckly, greenhouse species, of variable habit 



mncrone, 



spreading, prickly, greenhouse species, of variable habit New 

 Holland, 17 



A. vestita (clothed).' JL yellow, in loosely racemose heads, along 

 the peduncles ; upper ones solitary. June. L phyllodia obliquely 

 elliptic-lanceolate, one-nerved, ending in an awnlike mucrone, 

 hispid, h. 4ft New Holland, 1820. 



A. viscldula (clammy).* Jl. yellow; heads globular, on short 

 stalks, axillary, solitary or twin. February, t. linear, clammy ; 

 branches slender, clammy. A. 6ft, erect New South Wales, 

 IBM, 



AC.ENA (from alcaina, a thorn ; in allusion to the 

 slender spines on the calyx or fruit). ORD. Rosaceae. A 

 genus of dwarf sub-shrubby plants. Flowers capitate, or 

 interruptedly spicate, uninteresting ; petals absent. Leaves 

 alternate, impari-pinnate. Excepting for rockwork, or as 

 edgings to flower beds, they are not of much value ; their 

 habit is, however, very compact and neat. They require 

 BiTnilftT treatment to other hardy herbaceous plants, in 

 ordinary soil. Increased by cuttings, creeping rootlets, 

 divisions, and by seeds. 



A. mlcrophylla (small-leaved).* fl. green, small, in close heads, 

 furnished with showy, long crimson spines. Summer. L small, 

 pinnate, h. lin. to 2in. New Zealand. A neat evergreen with a 

 compact and cushion-like growth ; it is a very effective subject for 

 the rock garden, and grows freely in most situations. The 

 crimson globular heads of spine-formed calyces form a conspicuous 

 and ornamental feature of the plant. SYN. A. Son* Zealand**. 

 See Fig. 6. 



Acaena continued. 



A. millefolia (myriad-leaved).* f. inconspicuous. A very distinct 

 species with finely-cut pale green leaves. The fruiting spikes of 

 this are not collected in globular heads, as in the others, and 

 their presence detract from its value as an ornamental plant 

 Otherwise, it is very graceful. 



iy-!eave.l\ 



spikes. June. I. pinnate; leaflets deeply cut 



A synonym of A. mien- 

 h. 9in. Chili, 



green, small, in rounded 

 eeply cut h. 6in. to 1ft 



Chili, 1828 Small, fern-like. 

 A. Nov Zealand! (New Zealand). 



phyOa. 

 A. ovalifolia (oval-leaved). A. green. 



1868. Good for rock gardens. 

 A, pnlchella (pretty).* jZ. inconspicuous. A pretty bronzy. 



leaved species, admirably suited for rockwork crevices, where 



space is no object It grows very rapidly, and forms handsome 



tufts. 



ACAIiYFEA (the name given by Hippocrates to the 

 Nettle). OBD. Euphorbiaceae. Stove ornamental and 

 variegated nettle-like leaved shrubs. Flowers greenish or 

 reddish, inconspicuous, in erect or drooping bracted axillary 

 or terminal spikes ; those of the upper portion sterile, of 

 the lower, fertile. The undermentioned only are those most 

 worthy of cultivation. They are very easily grown, with 

 ordinary stove treatment, and in a peat and loam compost. 

 When well cultivated, the leaves of the hybridised varieties 

 are highly coloured, but rather coarse than otherwise. In- 

 creased by cuttings under a glass in sandy soil, in stove 

 heat, during April. 



A. Macafeeana (Macafee's). J. red, blotched with bronzy crim- 

 son. 1877. 



A. macrophylla (large-leaved).* I. cordate ovate, russet brown, 

 blotched with paler spots. The best and handsomest stove 

 species. 



A. marglnata (margined). I large, very hairy, ovate-acuminate, 

 centre brown, w " " 



wide. 



)wn, with a distinct margin of rosy carmine, about iin. 

 Fyi Islands, 1875. 



(mosaic).* L bronzy green, variegated with orange 

 and dull red. Polynesia, 1877. 



A. torta (twisted). L dark olive, tinted green; margin cut 

 Islands. 



into blunt, oblong segments. 

 for its curiously contorted fol 

 are terete, and covered by 



Samoan 

 It 

 leaves 



for its curiously contorted foliage. It has erect stems, which 



the 

 way. 



Remarkable 

 ect stems, which 

 in a very singular 



A. tricolor (three-coloured). A synonym of A. WiOtaiana. 



A, Wilkesiana (Wilkes').* I. ovate-acuminate, curiously blotched, 



mottled, and splashed with red and crimson ; ground colour 



coppery green, h. 6ft to 10ft New Hebrides, 1866. STW. A. 



tricolor. 

 A. W. marginata (Wilkes's margined).* L large, olive brown, 



margined with rosy carmine. Fyi Islands, 1875. 



ACAHTHACKE. A large order of soft-wooded, 

 herbaceous plants, usually having gamopetalons axillary 

 flowers; calyx composed of deeply imbricated scales; bracts 

 large, leafy. 



