MYRTACEAE 351 



Genera 14, species about 3,000, .tropical and subtropical regions of both 

 hemispheres, 10 genera and over 120 species in the Philippines. 



1. Fruit a dehiscenlt capstile; flowers umbellate 1. Eucalyptus 



1, Fruit indehiscent, fleshy. 



2. Leaves glabrous; fruit few-seeded 2,,Eugenia 



2. Leaves pubescent; fruit many-seeded; : 3. Psidinm 



1. EUCALYPTUS L'Heritier 



Trees with opposite or alternate, coriaceous, horizontsil Oi vertical, 

 glabrous leaves, very variable in shape, the nerves slender. Flowers small 

 to large, in axillary or lateral, peduricled, solitary umbels. Calyx-tube 

 obconic, campanulate, or oblong, adnate to the ovary, trunc&te, entire or 

 with 4 minute teeth, the orifice closed by a hemispheric, conical, or elongated, 

 thin or thick, fleshy or woody operculum, covering the stamens in bud, and 

 falling off entire, apparently formed of the concrete petals. Stamens 

 numerous. Ovary inferior, summit flat, convex or conical, 3- to 6-celled. 

 Fruit composed of the more or less hardened, truncate, calyx-tube enclosing 

 the capsule, opening at the apex by as many valves as there are cells. 

 Seeds few to many, small. (Greek "well" and "conceal," in allusion to 

 the operculum covering the stamens in bud.) 



Species 450 or more, mostly Australian, a few in Malaya, in the Philip- 

 pines 1 indigenous in Mindanao and a few Australian species introduced and 

 cultivated. 



*1. E. TERETicoRNis Sm. Blue Gum. 



A, tree reaching a height of 15 m or more, the bark grayish, peeling oflF 

 in thin layers. Leaves coriaceous, lanceolate, usually somewhat falcate, 

 10 to 25 cm long, pale, the nerves ascending. Peduncles axillary or 

 lateral, up to 1,5 cm long, each wiith 3 to 8 short-peduncled flowers. Flowers 

 white, about 1.5 cm in diameter when expanded, the calyx-tube obconic, 

 about 6 mm in diameter. Operculum about 10 mm long, conic-rostratp. 

 Fruit obovoid or subglobose, about 8 mm in diameter, protruded beyond the 

 calyx-rim and apiculate. 



Occasionally cultivated, but not spontaneous, fl. Feb.-Mar. A native of 

 Australia, now cultivated in many other warm countries. 



8. EUGENIA Linnaeus 



Glabrous trees or shrubs with opposite, rarely alternate, usually coria- 

 ceous leaves. Inflorescence terminal,, axillary, lateral, or sometimes cau-^ 

 line, the flowers solitary, fascicled, or in short racemes, cymes, or panicles. 

 Calyx-tube globose, ovoid, funnel-shaped, or sometimes elongated, the 

 lobes 4, rarely 5. Petals 4, rarely 5 or none, free or united in a calyptra. 

 Stamens very many. Ovary 2-, rarely 3-celled; style filiform; ovules 

 many in each cell. Fruit fleshy, rarely dry and fibrous, berry-like or 

 drupe-like, few-, often only 1-seeded. (In honor of Prince Eugene of 

 Saxony.) 



Species more than 700 in the tropics of both hemispheres, about 100 in 

 the Philippines. 



1. Flowers small, the calyx less than 6 mm long; petals cohering and 



falling as a whole 1. E. jambolana 



1. Flowers large, the calyx 1 cm long or more; 'petals free. 



