WOOTON AND STAJSTDLEY FLORA OF NEW MEXICO. 237 



KEY TO THE SPECIES. 



Perennials; petals about twice as long as the sepals. 



Lower leaves oblong or oblanceolate, obtuse 1. C. beeringianum. 



Lower leaves linear or linear-lanceolate, acute. 



Leaves all linear or linear-lanceolate 2. C. scopulorum. 



Leaves of the inflorescence ovate 3. C. oreophilum. 



Annuals; petals only slightly or not at all exceeding the 

 sepals. 



Lower leaves sericeous 4. C. sericeum. 



None of the leaves sericeous. 



Pedicels in fruit 1 to 3 times as long as the calyx, 



usually straight or nearly so 5. C. brachypodum. 



Pedicels in fruit 5 times as long as the calyx or more, 



strongly curved 6. C. longipedunculatum. 



1. Cerastium beeringianum Schlecht. & Cham. Linnaea 1: 62. 1826. 

 Type locality: "Ad sinus Eschscholzii etbonae spei." 



Range: British America to Arizona and New Mexico. 



New Mexico: Upper Pecos River {Bartlett 178). Damp woods. 



2. Cerastium scopulorum Greene, Pittonia 4: 298. 190J. 

 Type locality: La Plata Mountains, Colorado. 

 Range: Wyoming to New Mexico. 



New Mexico: Rio Pueblo; Winsors Ranch; Magdalena Mountains; Organ Moun- 

 tains; White and Sacramento mountains. Damp woods, in the Transition Zone. 



3. Cerastium oreophilum Greene, Pittonia 4: 297. 1901. 



Type locality: Foothills of the Rocky Mountains near Fort Collins, Colorado. 



Range: Colorado and New Mexico to California. 



New Mexico: Northwestern corner of the State (PaZmcr). 



4. Cerastium sericeum S. Wats. Proc. Amer. Acad. 20: 35^. 1885. 

 Type locality: Huachuca Mountains, Arizona. 



Range: Southern New Mexico and Arizona. 

 New Mexico: West Fork of the Gila {Wooton). 



A most striking species, at once distinguished from all our others by the dense 

 sericeous pubescence of the lower leaves. 



5. Cerastium brachypodum (Engelm.) Robinson in Britton, Mem. Torrey Club 5: 



150. 1894. 

 Cerastium nutans brachypodum Engelm.; A. Gray, Man. ed. 5. 94. 1867. 

 Type locality: Illinois. 



Range: South Dakota and Montana to Texas and Arizona, south into Mexico. 

 New Mexico: Santa Fe and Las Vegas mountains; Mogollon Mountains; Burro 

 Mountains; Hillsboro; White Mountains. Damp woods, in the Transition Zone. 



6. Cerastium longipedunculatum Muhl. Cat. PI. 46. 1813. 

 Cerastium nutans Raf . Prec. Somiolog. 36. 1814. 



Type locality: Pennsylvania. 



Range: British America to North Carolina and Arizona. 



New Mexico: Mogollon Mountains; Burro Mountains; Sawyers Peak; Organ 

 Mountains; White Mountains. Damp woods, in the Transition Zone. 



