226 LETTER XLIX. 



Polypetalous Apocarpous Exogens. 



Group 7« Apocarpotts. 



a. The Rose Tribe (Rosacese), Plate VIII. 1. 

 The Apple Tribe (Pomea?). 



The Almond Tribe (Amygdalese). 



The Burnet Tribe (Sanguisorbea?). 



The Pea Tribe (Leguminosse), Plate VIII. 2. 



The Carolina Allspice Tribe (Calycanthaceae). 



b. The Saxifrage Tribe (Saxifragaceae), Plate 



XXXVII. 2. 

 The Bauera Tribe (Baueracese). 

 The Houseleek Tribe (Crassulacese), Plate 



XXXVII. 1. 



Subclass II. MoNOPETALous Plants. 

 The groups are five ; namely — 



1. Polycarpous ; ovary of several carpelsy either dis- 



tinct or consolidated, and 7iever inferior, except 

 in one case ; fruit never bony and nut-like. 



2. Epigynons ; ovary of several carpels, either distinct 



or consolidated, and inferior in all cases. 



3. Aggregose ; ovary of one carpel only, and that 



either superior or inferior. 



4. Nucamentous ; ovary of two or more carpels, which 



change to bony nuts or seed-like pericarps, and 

 are never inferior. 



5. Dicarpous ; ovary of two carpels, which are always 



superior, and do not change to bony nuts or seed- 

 like pericarps. 



The commoner natural orders belonging to these 

 groups, are as follows: — 



