124 NATURAL HISTORY OF PLANTS. 



GENERA. 



I. CANDOLLEiE. 



1. CandoUea Labill. — Flowers 5-merous. Sepals imbricated, 

 persistent. Petals usually 5, alternate witli the sepals, variably 

 imbricated deciduous. Stamens united to a variable height into 

 5 alternipetalous l-co -androus bundles (besides single free oppo- 

 sitipetalous stamens, in a few species) ; filaments free at the apex. 

 Anthers introrse, dehiscing by 2 clefts. Carpels 5, more rarely 

 3, 4, opposite the petals, 1-, 2-, very rarely 3-ovulate ; ovules ascend- 

 ing ; micropyle introrse inferior ; styles sulcate internally, bearing 

 capitate stigmas. Ripe carpels subcamose, or more usually dry, and 

 dehiscing as follicles. Seeds 1 or 2, arillate ; albumen fleshy ; 

 embryo minute. — Shrubs or undersbrubs ; leaves alternate simple 

 articulated at the base exstipulate ; flowers solitary terminal {S. E. 

 Australia). — See p. 85. 



2. Adrastaea DC. — Flowers 5-merous. Sepals imbricated per- 

 sistent. Petals 5, more rarely 3, 4, alternate with the sepals, 

 imbricated deciduous. Stamens 10, in two whorls, the inner 

 subalternipetalous ; filaments flattened cohering at the base ; 

 anthers basiti.xed introrse dehiscing by 2 clefts. Carpels 2 ; ovules 2, 

 ascending; styles subulate; fruit 2-follicular. — An undershrub; leaves 

 alternate, sessile, articulate; flowers sessile terminal (/r. Jux/ra/ia). 

 See p. 87. 



3. Pachynema K. Bu. — Flowers 5-merous. Sepals and petals 

 free imbricated. Stamens U-ll, variably arranged, 2 sterile interior 

 club-shaped, usually alternate with the carpels, 7-9 fertile ; filaments 

 flattened or club-sha])ed or conoidal ; anthers introrse, dehiscing 

 by 2 clel'ts. Carpels 2, 2-ovulatc ; when ripe dry 1 -seeded ; 

 seed arillate. — Herbs or shrubs ; branches rush-like or flattened 

 (cladodia) ; leaves minute scale-like deciduous ; more rarely few, 

 3-fid ; flowers axillary, solitary or few ; jjcdicel recurved {Australia). 

 See p. 88. 



