188 SUMMER FLOWERS. 



+++ 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 attaclied to tlie corolla, cohering hy 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. 



31;. Lobeliaceous plants — herbs ; flowers not in heads ; stamens 

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



ttttt Stamens free from the corolla, the anthers distinct. 



85. Campanulaceous plants — herbs ; stamens as many as the 

 lobes of the corolla ; anthers opening longitudinally. 



36. Vacciniaceoiis plants — shrubs ; stamens twice as many as 



the lobes of the corolla ; anthers opening by two terminal 

 pores. 



** Stamens hifpogynoiis. 



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 perigynous ; (ovary superior). 

 t Seeds attached to a free central placenta. 

 % Stamens opposite the corolla-lohes. 



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 



