138 SUMMER FLOWERS. 



J J+ Fruit single or one-seeded. 



31. Valerianaceous plants herbs ; flowers not in close heads; 



corolla five-lobed ; stamens fewer than the corolla-lobes. 



32. Dipsacaceous plants herbs ; flowers in compact heads or 



spikes ; stamens equalling in number the divisions of the 

 four- or five-lobed corolla. 



ttt Stamens attached to the corolla, cohering by their anthers. 



33. Composite plants herbs ; florets collected in heads ; sta- 



mens as many as the corolla lobes ; fruit dry, one-seeded. 



tttt Stamens free from the corolla, the anthers cohering. 



34. Lobeliaceous plants herbs ; flowers not in heads ; stamens 



as many as the lobes of the corolla ; fruit many-seeded. 



ft ttt Stamens free from the corolla, the anthdrs distinct. 



35. Campanulaceous plants herbs ; stamens as many as the 



lobes of the corolla ; anthers opening longitudinally. 



36. Vacciniaceous plants shrubs ; stamens twice as many as 



the lobes of the corolla ; anthers opening by two terminal 

 pores. 



** Stamens hypogynous. 



37. Ericaceous plants shrubs; stamens equal to or twice as 



many as the lobes of the corolla ; anthers with an appen- 

 dage, opening by two pores. 



*** Stamens per igy nous ; (ovary superior). 

 t Seeds attached to a free central placenta. 

 J Stamens opposite the corolla-lobes. 



38. Primulaceous plants herbs ; stamens equalling in number 



the lobes of the corolla ; style one ; ovary many-seeded. 



39. Plumbaginaceous plants herbs ; stamens equalling in 



number the lobes of the corolla ; styles five ; ovary containing 



