DICOTYLEDONES— THALAMIFLOEiE 283 



imbricate, deciduous. Stamens 5, hypogynons, alternate with 

 the peials ; anthers 2-celled. Ovary superior ; styte single ; 

 stigmas equal in number to the placentas, which are 2 or more, 

 and either axils or parietal ; ovides anatropous, horizontal or 

 ascending. Fruit baccate, or a loculicidal capsule. Seeds 

 nximerous, AN-ith a minute embryo in copious fleshy albumen. 



Distrihiition and Numbers. — They are chiefly Australian 

 plants, but are occasionallj' found in Africa and some other 

 parts of the globe. None, however, occur in Europe or America. 

 Illustrative Genera : — Pittosporum, Soland. ; Cheiranthera, 

 Cunningham. The order includes about 80 species. 



Properties and Uses. — These plants are chiefly remarkable 

 for their resinous properties. Some have edible fruits, as cer- 

 tain species of Billaidiera. A few are cultivated in this 

 country on account of their flowers, as Sollya, Billardiera, &c. 



Order 66. TeemandkacejB, the Porewort Order. — Charac- 

 ter. — Heath-like shrubs, with usually glandular hairs. Leaves 

 exstipulate, alternate or whorled. Flowers axillary, solitary, 

 pedicellate. Sepals 4 or 6, eqvial, slightly coherent, deciduous, 

 and with a valvate aestivation. Petals corresponding in number 

 to the sepals, deciduous, and with an involute aestivation. Sta- 

 mens distinct, hypogynous, 8 — 10, 2 being placed before each 

 petal ; anthers 2- or 4-celled, with porous dehiscence. Ovary 

 2-celled; ovules 1—3 in each cell, pendulous; style 1 or 2 ; 

 stigmas 1 — 2. Fruit 2-celled, a capsule with loculicidal dehis- 

 cence. Seeds pendulous, hooked at the chalazal end ; embryo 

 straight, in the axis of fleshy albumen ; radicle next the hilum. 



Distribution and Numbers.— ATI are natives of New Holland. 

 Illustrative Genera : — Tetratheca, Smith ; Tremandra, H. Br. 

 The order includes about 16 species. 



Properties and ZJses.-^Altogether unknown. 



Order 67. Polygalace^, the Milkwort Order. — C h a r a c te r. 

 — Shrubs or herbs. Leaves alternate or opposite, exstipulate, 

 and usually simple. Pedicels bracteate. Flowers irregular, 

 unsymmetrical, and arranged in a somewhat papilionaceous 

 manner ; but here the wings are derived from the calyx, where- 

 as in the Leguminosse they belong to the corolla. Sepals 5, very 

 irregular, usually distinct ; 3 are exterior, and of these 1 is 

 posterior and 2 anterior ; the other 2 are interior and lateral, 

 usually petaloid, and form the wings to the flower. Petals 

 hypogynous, usually 8, more or less united, of which 1, forming 

 the keel, is larger than the rest, and placed at the anterior part 

 of the flower ; the keel is either naked, orosted, or 3-lobed ; the 



