118 MYRTACEiE. \Myrtacece. 



Calyx-tube elongated and tapering at the base. 



Calyx-limb obscurely toothed 3. Acmena. 



Calyx-limb distinctly 4-lobed 4. Jambosa. 



Calyx entire and closed in the bud, splitting irregularly as the flower 



opens 5. Psidium. 



Calyx-tube wholly adnate, the lobes reaching to the ovary. Leaves 



3- or 5-ribbed 6. Rhodomyrtus. 



1. B^CKEA, Linn. 

 Calyx-tube campanulate, acute at the base, produced above the ovary ; lobes 

 5, membranous. Petals 5. Stamens 10 or fewer. Ovary 2- or 3-celled, 

 with several ovules in each cell. Capsule opening at the top in 2 or 3 locu- 

 licidal valves. Seeds angular. Embryo straight, with short cotyledons. — 

 Heath-like shrubs. Leaves opposite, small, and narrow. Flowers solitary 

 in the axils, with 2 minute bracts at their base. 



A small genus, chiefly Australian, with one species extending over the Indian Archipelago 

 to China. 



1. B. frutescens, Linn.; DC. Prod. iii. 229 ; Bot. Mag. t. 2802. A 

 glabrous, heath-like shrub, with twiggy branches. Leaves linear-subulate, 

 3 or 4 lines long, erect or spreading. Flowers small, nearly sessile and soli- 

 tary in the axils of the leaves, and not attaining half their length. Calyx-lobes 

 orbicular, and almost petal-like. Stamens 10 or rarely 8. Ovary 3-celled. — B. 

 Cumingiana, Schau. in Walp. Rep. ii. 920. 



Very common in the island, Champion and others. Extends over the Indian Archipelago, 

 the Malayan Peninsula, the Philippines, and South China. The Malacca specimens, as well 

 as the Chinese ones, have the parts of the flowers generally in fives, and only occasionally 

 and accidentally reduced to fours. 



2. SYZYGIUM, Gaertn. 



Calyx-tube shortly obovate, produced above the ovary, bordered with 4 or 

 rarely 5 very short teeth, which disappear as the flower expands. Petals 4 or 

 rarely 5, more or less cohering and falling off together, or rarely free. Stamens 

 numerous, free. Ovary 2-celled, with several ovules in each cell. Fruit a 

 berry, crowned by the truncate remains or scar of the calyx. Seed rarely 

 more than 1. Embryo straight, the cotyledons thick and usually consolidated 

 into a single mass. — Trees or shrubs. Leaves opposite, coriaceous. Flowers 

 in trichotomous panicles, usually terminal and corymbose, more rarely axillary 

 and few-flowered. 



A considerable genus, dispersed over tropical Asia, with a few African or Australian spe- 

 cies. It differs in little but the calyx from the very large chiefly American genus Eugenia, 

 and, as well as the two following genera, is united with it by many botanists. 



Panicles few-flowered, axillary. Leaves not above 1 in. long. Petals 



free 1. S. luxifoliwn. 



Cymes small, mostly terminal. Leaves narrow, 1^ to 2 in. long. Petals 



cohering 2. S. odoratum. 



Panicles many-flowered, lateral. Leaves 3 to 6 in. long. Petals cohering 3. S. nervosum. 



1. S. buxifolium, Hook, and Am. Bot. Beech. 187. A glabrous, much- 

 branched shrub, the younger branches quadrangular. Leaves obovate or 

 broadly oblong, obtuse, \ to 1 in. long, narrowed at the base into a very 

 short petiole, rather thick ; the lateral veins inconspicuous. Cymes or panicles 



