174 ROSACES. 



enveloped in pulp, the fruit being an assemblage of 

 small drupes ; in Agrimony alone there are but two 

 seeds, which are enclosed in a bristly, hardened calyx. 

 The plants in this division are mostly herbaceous, but 

 some few are shrubs. ]STone of them are injurious ; the 

 leaves and roots of some are astringent, or tonic. The 

 fruit of the Strawberry, Raspberry, and Bramble, is too 

 well known to need any description. 



3. DRYAS (Mountain Avens). Calyx in 8 10 equal 

 divisions, which are all in one row ; petals 8 10 ; styles 

 finally becoming feathery tails, not hooked at the ex- 

 tremity. (Name from the Greek drys, an Oak, from a 

 fancied resemblance between the leaves.) 



4. GUM (Avens). Calyx 10-cleft, in two rows, the 

 outer division smaller ; petals 5 } styles finally becoming 

 jointed awns hooked at the extremity. (Name from 

 the Greek geyo, to taste.) 



5. POTENTILLA (Cinquefoil). Calyx 10-cleft, in 2 

 rows, the outer divisions smaller ; petals 5 ; seeds with- 

 out awns, on a dry receptacle. (Name from the Latin 

 potens, powerful, from the powerful properties supposed 

 to reside in some species.) 



6. TORMENTILLA (Tormentil). Calyx 8-cleft, in 2 

 rows ; the outer divisions smaller ; petals 4 ; seeds with- 

 out awns, on a dry receptacle. (Name from the Latin 

 tormina, dysentery, for which disease it was considered 

 a specific.) 



7. SIBBALDIA. Calyx 10-cleft, in 2 rows, the outer 

 divisions smaller ; petals 5 ; stamens 5 ; seeds about 5, 

 without awns, on a dry receptacle. (Named after Robert 

 Sibbald, a Scottish naturalist of the 17th century.) 



8. COMARUM (Marsh Cinquefoil). Calyx 10-cleft, in 

 2 rows, the outer divisions smaller ; petals 5 ; seeds with- 

 out awns, on an enlarged spongy receptacle. (From the 

 Greek comaros, the name of a plant very distinct from 

 the present.) 



9. FRAGARIA (Strawberry). Calyx 10-cleft, in 2 rows, 

 the outer divisions smaller ; petals 5 ; seeds without 



