CARYOPHYLLACEAE 129 



8. CERASTIUM L- 



Petals shorter than the sepals or about equalling them in length. 

 Pedicels shorter than the sepals at maturity. i. C.viscosurn. 



Pedicels longer than the sepals at maturity. 

 Leaf-blades less than 4 mm. long : sepals 3-3.5 mm. long : capsules 5-7 mm. 



long. 2. C. semidecandrtun. 



Ivcaf-blades over 4mm. long : sepals 5-6 mm. long : capsules 7-10 mm. long. 



3. C. vulgatuin. 

 Petals manifestly longer than the sepals. 



Annual : foliage viscid : corollas 6-12 mm. broad. 4. C. longipedxinculaium. 

 Perennial : foliage glabrous or pubescent : corollas 17-21 mm. broad. 



5. C. arvense. 



1. Cerastium viscosumly. Mouse-Ear Chickweed. (Man. p. 397 ; 

 I. F.y. 14S4.) In waste places and meadows, N. B. to Ont., Fla. and 

 Max. Nat. from Eu. , also in W. I., C. Am. and on the Pacific Coast. — 

 Pennsylvania : Lancaster ; Chester ; Dei^aware. 



2. Cerastium semidecandrum L. Smali. Mouse-Ear Chickweed. 

 (Man. p. 397 ; I. F.y. 148^.) In dry, sterile soil, N. J. and Pa. to Va. 

 Nat. from Eu. — Pennsylvania : Lancaster. 



3. Cerastium vulgatum L. Larger Mouse-Ear Chickweed. (Man. 

 P- 397 ; I- F- /■ 14S6.) In fields and woods, almost throughout North 

 America. Mostly nat. from Eu. Native of Asia. — Pemisylvania : MON- 

 ROE ; Northampton ; Bucks ; Delaware ; Chester ; Lancaster ; 

 Luzerne ; Franklin. 



4. Cerastium longipedunculatum Muhl. Nodding Chickweed. 

 (Man. p. 397 ; I. V.f. 148^.) In moist, shaded places, N. S. and Hudson 

 Bay to N. C., B. C, Nev. and Max. — Pennsylvania: Northampton; 

 Bucks ; Delaware ; Chester ; Lancaster. 



5. Cerastium arvense L. Field Chickweed. (Man. p. 398; I. F. 

 f. 1489.) In dry, rocky places, Lab. to Alaska, Ga., Mo., Nev. and 



Calif. Also in Eu. and Asia. — Pennsylvania : Northampton ; Bucks ; 

 Philadelphia ; Chester ; Lancaster ; Franklin ; Huntingdon ; 

 Lycoming ; Delaware ; York. 



5a. C. arvense oblongifolium (Torr. ) Hollick & Britton. (Man. p. 

 398. ) Delaware ; Lancaster ; Dauphin ; Perry. 



5b. C. arvense velutinum (Raf.) Britton. (Man. p. 398.) Chester ; 

 Lancaster. 



9. S AGIN A L. 



Sepals and petals mostly 4 : petals much shorter than the sepals or wanting. 



Stems and branches depressed-spreading : petals present, i. 5'. proctimbens. 



Stems and branches erect : petals obsolete or wanting. 2. 5. apetala. 

 Sepals and petals mostly 5 : petals as long as the sepals or nearly so. 



3. 5. decnnibens. 



1. Sagina procumbens L. Procumbent Pearl wort. (Man. p. 

 399; I. F.y. 1494.) In moist places, Newf. and Greenland to Mich., Pa. 

 and N. J. Native of Eu. and Asia. — Pennsylvania : Northampton, 

 streets of Bath ; Philadelphia. 



