184 



CARYOPHYLLACEAE (PINK FAMILY) 



1. C. Buffumae. 



i. C. brachypodium. 



3. C. longipedunculatum, 



4, C. elongatum. , 



6. CERASTIUM L. Chickwbed 



Mostly low pubescent or hirsute herbs with white flowers in terminal leafy 

 or scariously bracted dichotomous cymes. Sepals distinct. Petals emar- 

 ginate or bifid. Stamens 10. Styles 5. Capsule often incurved, twice or 

 thrice the length of the sepals, opening by about 10 apical teeth. Seeds 

 rough. • ''- 



AuQuals. 



Leaves less than 20 mm. long; pedicels not longer than the 

 capsule. 

 Rays and pedicels strongly swollen at base 

 Rays and pedicels same diameter as the node 

 Leaves more than 20 mm. long; pedicels much longer than 

 the capsule. 

 Capsule long-exserted 

 Capsule nearly wholly included 

 Perenmals. 



Petals scarcely longer than the sepals. 



Leaves sparse .... .... 5. 0. beeringianum, . . 



Leaves imbricated below . . , . . . . 6. C. fuegianum. 



Petals about twice as long as the sepals. 



Mature capsule scarcely surpassing the sepals . . . 7. C. arvense. 

 Mature capsule about twice as long as the sepals . . S. 0. oreophilum. 



1. Cerastium BuffuiHae A. Nels. Bull. Torr. Bot. Club 26: 239. 1899. An- 

 nual, yeUowish-green, glandular-pubescent, and very leafy: stems crowded 

 upon the slender root and freely branched, becoming matted: leaves narrowly 

 oblong to elliptic, 5-12 mm. long: the few-flowered cymes very numerous; 

 the peduncles and pedicels dilated or swollen at the base into an elliptic- 

 oblong foot: petals one half longer than the oblong obtusish sepals: capsule 

 about twice as long as the sepals. — ^Type locality only, Big Horn Mountains, 

 Wyoming. 



2. Cerastium brachypodium (Engelm.) Robins, in Brit. Mem. Torr. Club 

 5: 150. 1894. Annual, pale green, viscid-pubescent: stems erect, simple or 

 sparingly branched, 1-2 dm. high: leaves oblong or spatulate, 1-2 cm. long: 

 cymes terminal, rather few-flowered; pedicels, even the lower ones, scarcely 

 exceeding the capsule, from nearly erect to widely spreading or decurved: 

 capsule usually slightly curved, 2-3-times as long as the calyx. — Not infre- 

 quent in our range, and eastward and westward. 



3. Cerastium longipedunculatum Muhl. Cat. 45. 1813. Annual, bright 

 green, more or less viscid-pubescent: stems weak, branched, ascending or 

 almost prostrate: leaves oblong to spatulate below, lanceolate or narrower 

 upward, 2-5 cm. long: cyme several to many-flowered; the pedicels slender, 

 much longer than the mature capsule: petals twice as long as the nodding 

 capsule. C. nutans. — Across the continent. 



4. Cerastium elongatun Pursh, Fl. Am. Sept. 321. 1814. Annual, glan- 

 dular-pubescent, 1-2 dm. high: stems many from the base, somewhat branched: 

 leaves linear-lanceolate, 15-30 mm. long, very numerous below: cyme usu- 

 ally trichotomous; the pedicels rather stout, variable in leiigth, usually much 

 longer than the mature capsule: petals large, often more than twice as long 

 as the acute sepals: capsule short, subglobose and scarcely exserted. — Northern 

 Wyoming, Montana, and westward. 



5. Cerastium beeringianixm Cham. & Schlecht. Linnaea 1: 62. 1826. Per- 

 ennial, tomentulose and somewhat glandular- viscid above: stems usually sev- 

 eral from the slender branches, of the caudex, low and spreading, ovate- 

 elUptic, oblong or lanceolate, 3-10 mm. long: flowers few, in a narrow cyme, 

 with short pedicels: petals and capsule but little longer than the sepals. — In 

 the mountains; from New Mexico to Alaska. 



6. Cerastium fuegianimi (Hook.) A. Nels. Perennial, with slender root- 

 stock; the slender strict stem only 5-10 cm. high: leaves short, thickish and 

 itnbricated on the lower part of the stem: flowers solitary or few: petals and 

 capsule but slightly longer than the calyx. (C. arvense fuegianum Hook. Bot. 

 U. S. Expl. Exp. 1: 129; Hoi. & Brit. BulL.Torr. Bot. Club 14: 50.)— In 

 Yellowstone Park, also in Fuegia. 



