148 MYRTACE^. 



even when the translucent glands are not conspicuous 

 the leaves have as a rule a distinct scent. 



Species about 2,000 in the warmer parts of the world. 

 Leaves linear, ^ inch wide. Flowers small . . . b^ckea. 

 Leaves broad with three main nerves. . . rhodomyrtus. 

 Leaves broad with midrib and slender veins . . . Eugenia. 

 Leaves broad, of mature plants alternate . . . eucalyptus. 

 Flowers in globular heads , . . syncarpia. 



Bi€CKEA. F.B.L 59 L 



Leaves narrow and small. Flowers small. Stamens 



five or ten only. Ovary two to three-celled ; ovules many 



on peltate placentas. 



Species 60, mostly Australian. 



Baeckca virgata Andrs. ; 1 2. Loosely branched shrub 



with slender twigs. Leaves 5^ by J^ inch, linear- 

 lanceolate to narrow-oblong, acute, flat, one-nerved, with 

 numerous pellucid glands raised on the lower side when 

 dry. Flowers in the upper axils, umbelled by pedicels of 

 1/5 inch on peduncles of ^ inch. Calyx hemispheric, 

 ^ inch lobes small and round. Petals round, stamens 

 five : filaments short. Ovary inferior, three-celled : 

 ovules round the edges of peltate placentas. Capsule 

 flat-topped. 



An introduction from Australia, native from Victoria northwards to 

 Queensland. Fyson 1864, 2167. 



EUCALYPTUS. 59 n.* 



Australian Gum. 

 Trees with the leaves on the young plants, and on those 

 which spring up from a stump, opposite, sessile hori- 

 zontal; but on the upper and newer branches alternate, 

 petioled and drooping. Flowers three or more, on axillary 

 peduncles. Calyx top-shaped, scarcely toothed. Petals 

 five, united into a hemispherical cap which soon falls 



