308 ALSINACEAE 



3. Sagina L. 



Parts of the flower in 4's (or some flowers in 5's). 1. 5. procumbens. 



Parts of the flower in 5's, the petals equalling or shorter than the 



sepals. 2. 5. decumbens. 



i. S. procumbens L. In moist places: Newf. and Greenland to 

 N. J., Pa., Kan. and Mich. Probably naturalized from 

 Europe. 



Rare or occasional throughout most parts of our range, except 

 in the pine-barrens, there probably wanting. 



2. S. decumbens (Ell.) T. & G. In dry soil: E. Mass. to 111., 

 Fla., Mo. and La. 

 Conn. Fairfield Co., near the coast. 

 N. Y. Recorded only from S. I., there rare and local; and at 



Hempstead, L. I. 

 N. J. Monmouth, Mercer and Atlantic counties, thence increasing 



and common southward, except in the pine-barrens, there rare 



or wanting. 

 Pa. Near Philadelphia. 



Tertiary, common except on Beacon Hill; Cretaceous, common: 

 Older Formations, decreasing northward. Not north of the 

 moraine, except in Conn. 160-224 days. About sea level. 



Specimens have been mistaken for S. apetala Ard. of Europe. 



Sagina subulata L. has been collected as a waif near Philadelphia. 



From near Philadelphia, specimens were collected many years ago of Moenchia 

 erecta (L.) Gaertn. It differs from Sagina in having the styles opposite the sepals. Not 

 recently collected. 



4. Arenaria L. 



Valves of the capsule 2-clef t or 2- 1 < >ut het 1 , sometimes appearing as if 



double the number of the styles. 1. A. serpyllifolia. 



Valves of the capsule entire. 



Leaves subulate or setaceous, rigid. 



Leaves densely imbricated; pine-barren species. 2. A. caroliniana. 



Leaves fascicled in the axils. 3. A. stricla. 



Leaves soft, herbaceous, narrowly linear or filiform. 4. A. groenlandica. 



I. A. serpyllifolia L. In dry or rocky places: throughout eastern 

 North America. Naturalized from Europe. 



Common throughout our range, usually more plentiful- in cul- 

 tivated areas than elsewhere. 

 Arenaria leptoclados Guss., a European plant, more slender than 

 A. serpyllifolia L., has been reported as growing in waste places 



