ICOSANDRIA. POLTGYNIA. 311 



Asia (Siberia.) Are there no species in the southern he- 

 misphere? 



.^50. COMARUM. L. (Marsh Cinqnefoil.) 



Calix inferior, 10-cleft, 5 of the segments al- 

 ternately smaller. Petals 5, smaller than the 

 calix. Seeds even, attached to an ovate spongy 

 persistent receptacle, not becoming a berry. 



A marsh plant; with pseudopinnated leaves, stipules 

 growing to the petioles, and sheathing the stem; pedun- 

 cles feu-flowered axillary and terminal. Flowers brown- 

 ish, leaves glaucous beneiuh. 



Species. 1. C paliistre. In nearly all the western 

 states and territories as far as Louisiana. — A genus of but 

 a single species, common to the whole nothem hemis- 

 phere. 



551. FRAGARIA. L, (Strawberry.) 



Calix inferior, 10-cleft, 5 of the segments al- 

 ternately smaller. Petals 5, Receptacle of the 

 seed ovate and deciduous becoming a berry, 

 Seeds even. 



Creeping herbaceous plants, often sending out filiform 

 radicant stems in all directions which diminish the quan- 

 tity of flowers and fruit; leaves ternate, very rarely digi- 

 tate, by cultivation sometimes simple; stipules adnate to 

 the petiole; flowers often terminally corymbose, some- 

 times dioicous; receptacle esculent. 



Species. 1. F. vesca. v. v. In the state of Ohio near 

 Lake Krie. 2. virginicma. 3. canadensis. 



A small but very widely dispersed genus, of which there 

 are 3 species in Europe, 1 in Surinam, 1 in Chili, and 1 at 

 Buenos Ayres, in South America, a yellow flowered spe- 

 cies has also been recently introduced from India. 



552. CALYCANTHUS. L, (Carolina All-spice.) 

 Calix urceolate, the lower part entire, upper 



part miiltifid, squarrose, leaflets colored, peta- 

 loid. Corolla none. Styles many. Seeds many, 

 naked, smooth and cartilaginous, included in 

 the enlarged ventricose and succulent calix. 



Odoriferous and spicy shrubs with opposite and very 

 entire leaves destitute of stipules, having the upper sur- 



