VOL. II.] 



PINK FAMILY. 



Cerastium brachypodum compactum Robinson, Proc. Am. Acad. 29: 278. 1894. 

 Cyme capitate; capsules very slender. Nebraska to Texas. 



6. Cerastium arvense L,. Field Chickweed. (Fig. 1489.) 



Cerastium arvense L. Sp. PI. 438. 1753. 



Perennial, densely tufted, erect or ascend- 

 ing, pubescent or nearly glabrous, flowering 

 stems simple or sparingly branched, 4 / -io / 

 high. Basal leaves and those of the sterile 

 shoots linear-oblong, close, slightly narrowed 

 at the base; stem-leaves distant, linear or nar- 

 rowly lanceolate, 5"-i5" long, i // -2 // wide, 

 acute; flowers several, cymose, 6 // -8 // broad; 

 pedicels slender, erect; petals obcordate, 

 much exceeding the lanceolate acute sepals 

 which equal or are a little shorter than the 

 slightly oblique pod. 



In dry, rocky places, Labrador to Alaska, south 

 to Georgia, Missouri, Nevada and California. 

 Also in Europe and Asia. April-July. 



Cerastium arvense oblongifolium (Torr. ) Holl. & Britt. Bull. Torr. Club, 14: 47. 1887. 

 Cerastium oblongifolium Torr. Fl. U. S. 460. 1824. 



Larger, pubescent, leaves oblong or lanceolate, broader, mainly obtuse; capsules about twice 

 the length of the calyx. Mainly on magnesian rocks, southern New York to Virginia, west to 

 southern Ontario, Minnesota and in the Rocky Mountains and Sierra Nevada. 



Cerastium arvense velutinum (Raf. ) Britton, Mem. Torr. Club, 5: 150. 1894. 

 Cerastium velutinum Raf. Med. Rep. (II.) 5: 359. 1808. 

 Cerastium arvense var. rillosum Holl. & Britt. Bull. Torr. Club, 14: 49. 1887. 



Depressed, villous-pubescent, stem-leaves lanceolate or ovate-lanceolate; capsule 2 or 2^ times 

 the length of the calyx. On serpentine rocks, Lancaster and Chester counties, Pa. 



7. Cerastium alpinum L,. Alpine Chickweed. 

 (Fig. 1490.) 



Cerastium alpinum L. Sp. PI. 438. 1753. 



Perennial, generally silky-hairy, sterile stems prostrate, 

 flowering stems erect, 2 / -6' high. Lower leaves somewhat 

 oblauceolate or spatulate, dense, 2 // -4 // long, obtuse; upper 

 leaves distant, ovate-oblong, obtusish, 4 // -S // long; flowers 

 solitary or 2-3, 6" -9" broad; pedicels slender; petals 2-lobed, 

 twice the length of the lanceolate acute scarious-tipped sepals; 

 pod longer than the calyx, nearly straight. 



In nioist, rocky places, Gaspe, Quebec; Labrador and in arctic 

 America. Also in arctic and alpine Europe and Asia. Summer. 



Cerastium alpinum Fischerianum (Ser. ) T. & G. Fl. N. A. i: 188. 

 1838. 



Cerastium Fischerianum Ser. in DC. Prodr. i: 419. 1824. 



Taller; pubescence more rigid. Labrador and through arctic 

 America to Siberia. 



