34 CARYOPHYLLACE^E. (PINK FAMILY.) 



elliptic or oblong-lanceolate : flowers in a simple or compound open umbel- 

 like few-rayed cyme: pedicels elongated. Gray, Proc. Acad. Philad. 1863, 

 59. Mountains of Colorado and northward. 



*- 4- Petals equalling or surpassing the calyx. 



2. S. longifolia, Muhl. Stem erect, weak, often with rough angles : leaves 

 linear, acutish at both ends, spreading : cipnes naked and at length lateral, pedun- 

 cled, many-flowered ; the slender pedicels spreading. From Oregon to British 

 America and across the continent. 



3. S. longipes, Goldie. Shining or somewhat glaucous, very smooth : 

 leaves ascending, lanceolate or linear-lanceolate, broadest at the base : cyme ter- 

 minal, few-flowered ; the long pedicels erect. Colorado and northward, thence 

 eastward to Wisconsin and Maine. 



Var. Igeta, Torr. & Gray. Branches erect from creeping stems, 3 to 6 

 inches high : leaves erect, rigid, carinate : sepals rather obtuse. With the Inst, 

 in the mountains. 



Var. Edwardsii, Torr. & Gray. Branches an inch or two high: leaves 

 ovate-lanceolate (the lowest sometimes ovate), sometimes sparsely ciliate at the 

 base : sepals acutish. Mountains of Colorado. 



# # Bracts foliaceous. 

 H- Petals shorter than the sepals, or none. 



4. S. borealis, Bigelow. Erect or spreading : leaves elongated, lance-linear, 

 finely serrulate, the intramarginal nerve very indistinct : flowers in dichotomous 

 cymes : seeds smooth. Abundant in the mountains of Colorado and north- 

 ward, and across the continent. 



5. S. Obtusa, Engelm. Like the last, but prostrate; leaves triangular-ovate, 

 smooth-edged, 1-nerved, and the delicate reticulated veins uniting into distinct 

 intramarginal nerves : seeds (under the lens) covr-red with oblong-linear pectinate 

 tubercles. Bot. Gazette, vii. 5. W. Colorado on the tributaries of the Gun- 

 nison lliver, Brandegce ; also in British Columbia. 



H H- Petals exceeding the sepals (sometimes wanting in No. 6). 



6. S. crassifolia, Ehrhart. Stems diffuse or erect, flaccid : leaves rather 

 fleshy, varying from linear-lanceolate to oblong : flowers terminal or in the 

 forks of the stem or of leafy branches : seeds rugose-roughened. Colorado, 

 Montana, and eastward to the Ohio valley. 



7. S. Jamesii, Torr. Somewhat viscidly pubescent, rather stout : leaves 

 linear to ovate-lanceolate : pedicels divaricate : seeds smooth. New Mexico, 

 Colorado, and westward. 



5. ARENA HI A, L. SANDWORT. 



Styles 3. Capsule globose or short-oblong. Mostly low annuals or peren- 

 nials, usually tufted : with sessile leaves, often subulate and more or less rigid : 

 flowers white, cymosely panicled or capitate. 



1. The 3 valves of the capsule 2-cleft or parted: seeds not nppendnged at the 

 hilum : cespitose perennials, mostly scarious-bracted . ARENARIA proper. 



* Petals exceeding the sepals. 



1. A. COngesta, Nutt. Smooth and glaucous : leaves very narrowly subu- 

 late, scabrous on the margin, often pungent : flowers in 1 to 3 dense subumbeJlate 



