290 DECANDRIA PENTAGYNIA. 



S14. ARENARLi. L, (Sand-wort.) 



Calix S-Ieaved, spreading. Petals 5, entire. 

 Capsule l-celled, many-seeded. 



Flowers axillary or terminal; leaves stipulate; flowers 

 sometimes with 5 to 8 stamina, and 5 styles. Seeds mera- 

 branaceoiisly margined in A. rubra. And A. media. 



Species. \. \. peploides. On the sea-coast. 2.lateri' 

 Jlora. Common in the mountainous parts of Pennsylvania. 

 3. serpyllifolia. 4. thymifolia. 5. macrocarpa- 6. patnla. 

 7. sqnarrosa. 8. stnata. 9. glabra. \Q. juniperina. 11. 

 land folia. \2- fnsciculata. 13. canadensis. 



An European genus and many of the species alpine. 



Order IV— TETRAGYNIA. 



315. MICROPETALON. Fersoon, Spergu- 

 lA STRUM. Mich, 



Calix 5-leaved, spreading. Fctnls 5, minute, 

 entire or none. Capsule ovate, 4-valved. 



Habit similar to Stellaria. 



Species. 1. M. lanvginositm. 2. lonceolatnm. S.gra- 

 mineinn. Is not this Stellaria graminea? 



A trifling genus which ought to be united with Stella- 

 tia. 



Order V.— PENTAGYNIA. 

 316. SPERGULA. i. (Spurrey.) 



Calix 5-leaved. Fetals 5, entire. Capsule 

 ©vate, l-celled, 5-valvcd. 



Leaves verticillate, stipulate, or opposite and naked; 

 flowers axillary and terminal sometimes pentandrous. 

 Seeds mostly marginated. A genus partly distinguisha- 

 \i\e by habit from Arenaria, but destitute of character. 



Species. 1. S. arvensis. 2. saginoides. Common in 

 sandy fields and upon rucks frora New Jersey to NortU 

 (Carolina. 



