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LETTER XXXVI. 



Saxifrage Tribe. 



1 . Leaves alternate. 



2. Petals distinct. 



3. Stamens growing 

 from the side of the 

 calyx. 



4. Carpels more or 

 less distinct. 



5. Embryo as long as 

 the seed. 



1. Leaves sometimes 

 with stipules. 



2. Petals sometimes 

 wanting. 



3. Carpels inferior or 

 superior. 



4. Carpels, when ripe, 

 diverging and open- 

 ingatthe point only. 



HOLSELEEK TrIBE. 



1. Leaves alternate. 



2. Petals distinct. 



3. Stamens growincr 

 from the side of the 

 calyx. 



4. Carpels more or 

 less distinct. 



5. Embryo as long as 

 the seed. 



1. Leaves without 

 stipules. 



2. Petals always pre- 

 sent. 



3. Carpels superior. 



4. Carpels, when ripe, 

 opening along their 

 whole inner edge. 



5. Embryo in albumen. I 5. No albumen. 



Rose Tribe. 



1. Leaves alternate. 



2. Petals distinct. 



3. Stamens growing 

 from the side of the 

 calyx. 



4. Carpels more or 

 less distinct. 



5. Embryo as long as 

 the seed. 



1 . Leaves usually 

 with stipules. 



2. Petals sometimes 

 wanting. 



3. Carpels inferior or 

 superior . 



4. Carpels, when ripe, 

 opening along their 

 whole inner or outer 

 edge. 



5. No albumen. 



Hence, it appears, that when the differences be- 

 tween these three tribes are strictly inquired into, 

 there is nothing that will positively distinguish the 

 Saxifrages from the Roses, except the albumen of the 

 former, and the peculiar manner in which the two 

 carpels spread away from each other, and open at the 

 point when ripe. 



As for the Houseieek Tribe, the distinctions by 

 which it is known are more numerous and obvious, as 

 vou will see by studying the table. 



