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. viscosum. 



Pedicels longer than the sepals at maturity. 

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



long. 2. C. semidecandrum. 



Leaf-blades over 4mm. long : sepals 5-6 mm. long: capsules7-iomm.long. 



3. C. vulgalum. 

 Petals manifestly longer than the sepals. 

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

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



5. C. arvense. 



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

 I. V.f. '484-^ In waste places and meadows, N. B. to Ont., Fla. and 

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

 Pennsylvania : Lancaster ; Chester ; Delaware. 



2. Cerastium semidecandrum L. Smai,i, Mouse-Ear Chickweed. 

 (Man. p. 397 ; I. F.y. /48J.) 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 ; l- F. /. 14S6.) In fields and woods, almost throughout North 

 America. Mostly nat. from Eu. Native of Asia. — Pennsylvania : Mon- 

 roe; Northampton; Bucks; Delaware; Chester; Lancaster; 

 Luzerne ; Franklin. 



4. Cerastium longipedunculatum Muhl. Nodding Chickweed. 

 (Man. p. 397 ; 1. F.y. 148/.) In moist, shaded places, N. S. and Hudson 

 Bay to N. C, B. C, Nev. and Mex. — 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 velutlnum (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. S. procumbens. 



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'. decumbens. 



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

 399; I. F.y. 141)4.) -^^ moist places, Newf. and Greenland to Mich., Pa. 

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

 streets of Bath ; Philadelphia. 



