16 Key to the System of 



74. Lobes of the corolla almost constantly four, overlapping 



before expansion. 



Herbs, rarely somewhat woody plants ; flowers minute, 

 usually in spikes ; calyx consisting of sepals ; corolla dry, 

 almost transparent; stigma generally elongated, undi- 

 vided ; fruit very small, mostly opening by transverse 

 dehiscence ; embryo usually straight. Figure 98. 



Plant agineae. 377 



Lobes of the corolla almost constantly five and before 

 expansion contiguous, their marginal membrane then 

 folded inward. 



Herbs or shrubs, rarely small trees ; leaves scattered or 

 sometimes two laterally placed together ; flowers often 

 rather large ; stamens usually five, rarely unequal ; fruit 

 often two-celled ; seeds usually indefinite in number ; 

 embryo simply curved or coiled, generally filiform. 

 Figure 103. Solaiiaceae. 378 



75. Placentary one, fixed to the base of the fruit-cavity ... 76 



Placentaries two or more, fixed high or low to the 

 inner angle of the fruit-cells ... ... ... 77 



76. Fruit dehiscent, generally many-seeded. 



Herbs, seldom somewhat woody plants ; leaves usually 

 scattered or basal or whorled or crowded, in some species 

 dotted as well as the inflorescence; stamens opposite to 

 the lobes of the corolla ; stigma constantly undivided ; 

 fruit always one-celled. Primulaceae. 381 



Fruit indehiscent, generally one-seeded. 



Trees or shrubs; leaves nearly always scattered and pervaded 

 by pellucid dots or streaklets; stamens opposite to the 

 lobes of the corolla, not rarely in flowers distinct from 

 those bearing pistils; stigma undivided; fruit constantly 

 one-celled. Figure 99. Myrsinaceae. 383 



77. Anthers one-celled. 



Weak or robust shrubs, rarely trees and then not very tall; 

 leaves stiff, harsh, nearly always scattered ; stamens 

 usually five, often adriate to the corolla; anthers never 

 dorsally appendiculated ; stigma undivided ; fruit-cells 

 usually more than one ; placentaries fixed often high 

 to the inner angle of the fruit-cell. Figure 1 10. 



Epacrideae. 384 



Anthers two-celled ... ... ... ... 78 



