NATURAL ORDERS. 



XXVII. Onagracese. Perianth in twos or fouis. Stamens definite. 

 Ovary inferior. One style. 



XXVIII. Lytharieae. Stamens usually definite, inserted with the 

 petals at the top of the calyx-tube. Ovary syncarpous within the base 

 of the tube. One style. Lower leaves opposite. 



XXIX. Cuburbitaceae. Climbers with tendrils. Flowers unisexual. 

 Ovary inferior. 



XXX. Crassulaceae. Leaves succulent. Sepals, petals, stamens of 

 one or two rows, and free carpels, all isomerous. 



XXXI. Ribesiacese. Shrubs. Flowers regular. Stamens definite. 

 Ovary inferior. Placentas parietal. One style. 



XXXII. Saxifragaceae. Flowers regular. Stamens definite. Ovary 

 syncarpous at the base, but a separate style for each carpel. 



XXXIII. Droseraceae. Herbs with radical leaves covered with 

 long glandular hairs. Flowers regular. Stamens definite. Placentas 

 parietal. Styles distinct. 



XXXIV. Halorageae. Aquatic herbs with very small flowers. Calyx- 

 lobes and petals 4, 2, or none. Stamens definite. Ovary inferior. Styles 

 or stigmas distinct. 



** Petals and ttamcns epigynous (rotund an epigynous disk). 



XXXV. Umbelliferse. Leaves alternate. Fruit dry, separating from 

 the axis into seed-like carpels. 



XXXVI. Araliaceae. Leaves alternate. Fruit succulent. Carpels 

 often more than 2, and not separating. 



XXXVII. Loranthacese. Parasites. Stamens on, or opposite to the 

 petals. Leaves usually opposite. Ovary 1- celled. 



XXXVIII. Cornaceae. Leaves usually opposite. Stamens alternate 

 with the petals. Style .one. 



Subclass 3. MONOPETAL^E. Petals united (at least at the base) into a 

 single corolla. [The petals are absent in some Primulaceae and Oleaceae, 

 and are free in some Ericaceae and Plumbagineae.] 



1. Corolla epiyynous, bearing the stamens. 



XXXIX. Caprifoliaceae. Leaves opposite. No stipules. Ovary 2- 

 or more-celled. 



XL. Stellatse (a tribe of Rubiaceae). Stipules like the leaves in 

 appearance, and forming whorls with them round the stem. Ovary 

 2-celled, with 1 seed in each cell. 



XLI. Valerianeae. Stamens fewer than the lobes of the corolla. 

 Ovary and fruit 1 -seeded. 



XLII. Dipsacese. Florets in compact heads or spikes. Stamens 

 isomerous. Anthers free. Ovary and fruit 1 -seeded. 



XLIII. Comppsitse. Florete in compact heads. Stamens isomerous. 

 Anthers united in a ring round the style. Ovary and fruit 1-seeded. 



2. Stamens free from the corolla. 



XLIV. Campanulaceae. Herbs. Stamens as many as the corolla- 

 lobes. Anthers opening longitudinally. 



XLV. Ericaceae. Shrubs. Stamens usually twice as many at the 

 corolla-lobes. Anthers opening in pores or cross- valves. 



