ALSINACEAE. 



Vol. II. 



4. A, media. 



A.pubcra. 



A, tennesscensis. 



7. A, Holoslca. 

 S. A, glauca. 



9. A. longifolia. 



10. A, gramiiica. 



11. A, longipes. 



Petals shorter than the calyx ; lower leaves petioled. 

 Petals longer than the calyx, or as long ; lower leaves rarely petioled. 

 Petals longer than the blunt sepals. 

 Petals as long as the acute or acuminate sepals. 

 Leaves narrow, linear, oblong, oblanceolate or spatulate. 

 Flowers y"~ni" broad. 



Leaves lanceolate, ciliate. 

 Leaves linear, glabrous. 

 Flowers only 2"-6" broad. 



Bracts of the cyme small, scarious. 



Pedicels widely spreading ; cyme diffuse. 



Leaves linear, acute at each end ; seeds smooth. 

 Leaves lanceolate, broadest below ; seeds rough. 

 Pedicels erect ; flowers few or solitary. 

 Bracts of the cyme foliaceous, resembling the upper leaves. 



Capsule iJ4-2 times as long as the calyx; leaves lanceolate or oblong-lanceolate. 

 Seeds rough ; petals equalling or longer than the calyx. 12. A.crassifolia. 



Seeds smooth; petals much shorter than the caly.x or none. 13. A.borealis, 

 Capsule not longer than the calyx ; leaves linear or linear-spatulate ; petals none. 



14. A.fontinalis. 



I. Alsine aquatica ( L. ) Britton. Water Mouse-ear Chickweed. Fig. 1749. 



Cerastium aqualicitin L. Sp. PI. 439. 1753. 



StcUaria aquatica Scop. Fl. Carn. Ed. 2, 1 : 319. 1772. 



Alsii'C aquatica Britton, Mem. Torr. Club 5 : 356. 1894. 



Perennial, stem angled, mostly glandular-pubescent 

 above, nearly glabrous below, ascending or decum- 

 bent, branched, l-2l long. Leaves ovate or ovate- 

 lanceolate, acute at the apex, the upper sessile and 

 subcordate, the lower petioled, rounded at the base, i'- 

 2' long; flowers about i' broad, solitary in the forks 

 of the stem and in terminal cymes ; pedicels slender, 

 glandular, deflexed and much longer than the calyx in 

 fruit; calyx campanulate; sepals ovate, acute, about 

 one-half as long as the 2-cIeft petals; stamens 10; 

 styles 5, alternate with the sepals, rarely 6; capsule 

 nvoid-oblong, slightly longer than the caly.x; seeds 

 rough. 



In wet and waste places, Quebec and Ontario to Pennsyl- 

 Adventive from Europe. Water-chickweed. May-Aug. 



vania. Also in British Columbia. 



2. Alsine humifusa ( Rottb. ) Britton. Low 

 Chickweed. Fig. 1750. 



Stcllaria humifusa Rottli. Skrift. Vid. Selsk. 10: 447. 

 1770. 



Arenaria Ihymifolia Pursb. Fl. Am. Sept. 317. 1814. 



Alsine humifusa Britton. Mem. Torr. Club 5: 150. 1894. 



Glabrous, stems branching, spreading and ascend- 

 ing, i'-3' long, purplish. Leaves ovate or oblong, 

 fleshy, 2"-3" long, acutish or obtuse, sessile ; bracts 

 foliaceous; flowers few or solitary, terminal or 

 axillary, 3"-s" broad ; sepals ovate-lanceolate, acute 

 or acntish, 2" long; petals 2-parted, equalling or 

 somewhat exceeding the calyx ; capsule ovoid, as 

 long as the sepals; seeds smooth, brown. 



In moist or wet places. Greenland and Labrador to 

 New Brunswick and Maine, west to Alaska and Oregon. 

 Also in northern Europe and Asia. Summer. 



