306 ICOSANDRIA. PENTAGYNIA, 



Order III.— TRIGYNIA. 



339. SESUVIUM. L. 



Ccdix 5-parted, coloured. Petals none. Cap- 

 sule superior, ovate, 3-celled, opening trans- 

 versely all round, many-seeded. Seeds minute. 



Succulent herbaceous plants with opposite semiam- 

 plexicaule entire leaves, and axillary, solitary flowers. 



Species. 1. S. sessile. Leaves spathulate, flat; flowers 

 sessile, rosaceous. Hab. On the sea-coast, from New- 

 Jersey to Florida. Leaves someiinnes nearly linear; seg- 

 ments of tlie calix pointed below the summit. 



Order IV.— PENTAGYNIA. 

 540. ARONIA. Persoon. Mesptlus. L. 



Calix 5-toothed. Petals 5. Berry inferior 5 

 to lO-celled^ cells 1 orS-seeded. Speeds cartila- 

 ginous. 



Shrubs without spines, having alternate undivided 

 leaves, and flowers which are corymbose or racemose, 

 generally white; fruit a small black purple or scarlet po- 

 nioid berry, containing seeds similar to those of apples. 



BrECiES. 1. A. \rbntif'jlia. Berries scarlet in co. 

 rymbs, astringent and scarcely eatable at any period; but 

 without any acidity, and sweetish. 2- melanocarpa. 

 Fruit also astringent and black or nearly so, but prefera- 

 ble to the preceeding. 3. Boh^apinm. Berries purple, 

 pruinose, very saccharine and agreeably flavoured. 4. 

 ovalis. 5. miiguinea. Ph. 6^ *M?iifoUa. Smootli: 

 leaves roundish, the upper part toothed, pinnately 

 nerved, under side somewhat glaucous; raceme simple, 

 elongated; fruit black and sweet. Hab. In ravines and 

 on the elevated margins of small streams from Fort Man- 

 dan to the Northern Andes. Obs. A shrub 4 or 5 feet 

 high; leaves roundish and retuse, somewhat attenuated 

 at the base, toothed towards the summit; fruit dark 

 purple, somewhat pruinose, very agreeable and saccha- 

 rine; ripening about July and August. 



A North American genus, with the exception of 2 Eu- 

 ropean species, and 1 said to be indigenous to mount Ida 

 in Crete. 



541. PYRUS. L, (The Apple and Pear.) 



Calix 5-cleft. Petals 5. Apple large and 

 carnose, inferior, 5-celled, many-seeded. 



