CAR YOPH /LLA CEAE. 395 



Cymes lateral ; leaves oblong, 1-2 cm. long. 3. A. uliginosa. 



Stems with 1 or 2 pubescent lines ; petioles often ciliate. 



Petals shorter than the calyx ; lower leaves petioled. 4. A. media. 



Petals longer than the calyx ; lower leaves rarely petioled. 5. A. pubera. 

 Leaves narrow, linear, oblong, oblanceolate or spatulate. 



Flowers 1.4-2 cm. broad. 6. A. Holostea. 



Flowers only 4-12 mm. broad. 



Bracts of the cyme small, scarious. 



Pedicels widely spreading ; cyme diffuse. 



Leaves linear, acute at each end ; seeds smooth. 7. A. longifolia. 

 Leaves lanceolate, broadest below ; seeds rough. 8. A. graminea. 

 Pedicels erect ; flowers few or solitary. 9. A. longipes. 



Bracts of the cyme foliaceous, resembling the upper leaves. 



Capsule 114-2 times as long as the calyx ; leaves lanceolate or oblong- 

 lanceolate. 

 Seeds rough ; petals equalling or longer than the calyx. 



10. A. crassifolia. 

 Seeds smooth ; petals much shorter than the calyx or none. 



11. A. borealis. 

 Capsule not longer than the calyx ; leaves linear or linear-spatulate ; 



petals none. 12. A. fontinalis. 



1. Alsine aquatica (L.) Britton. Water Mouse-ear Chickweed. (I. F. f. 

 1472.) Perennial; stem angled, mostly glandular-pubescent above, ascending or 

 decumbent, 3-7 dm. long. Leaves ovate or ovate-lanceolate, acute, the upper 

 sessile and subcordate, the lower petioled, rounded at the base, 2-5 cm. long; 

 flowers about 1.2 cm. 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-cleft 

 petals; stamens 10; capsule ovoid-oblong, slightly longer than the calyx; seeds 

 rough. In wet and waste places, Ont. to Penn. Also in Br. Col. Adventive from 

 Europe. May-Aug. 



2. Alsine humifusa (Rottb.) Britton. Low Chickweed. (I. F. f. 1473.) 

 Glabrous; stems spreading and ascending, 2-8 cm. long, purplish. Leaves ovate 

 or oblong, fleshy, 4-6 mm. long, sessile; bracts foliaceous; flowers few or solitary, 

 6-10 mm. broad; sepals ovate-lanceolate, acute or acutish, 4 mm. long; petals 

 2 -parted; capsule ovoid, as long as the sepals; seeds smooth, brown. In moist or 

 wet places, Lab. to N. B. and Me., west to Ore and Alaska. Also in northern 

 Europe and Asia. Summer. 



3. Alsine uliginosa (Murr.) Britton. Bog Starwort. Marsh Chick- 

 weed. (I. F. f. 1474. ) Weak, slender, generally growing in masses; stems nearly 

 simple, 1-4 dm. long. Leaves oblong, 16-25 mm. long, 4-10 mm. wide, narrowed at 

 the base, the lower slightly petioled and sometimes ciliate, the upper sessile; flowers 

 6 mm. broad, in lateral sessile cymes, rarely terminal; sepals lanceolate, acute; 

 petals 2-parted, about the length of the calyx and the ovoid pod; seeds rough. In 

 cold brooks and springs, Md. and Penn. to Newf. Also in Br. Col. and the N. W. 

 Terr., Europe and Asia. Summer. 



4. Alsine media L. Common Chickweed. (I. F. f. 1475.) Annual, tufted, 

 much branched, decumbent or ascending, 1-4 dm. long, glabrous except a line of 

 hairs along the stem and branches, the pubescent sepals and the sometimes ciliate 

 petioles. Leaves ovate or oval, 4-35 mm. long, acute or rarely obtuse, the lower 

 often cordate; flowers 4-8 mm. broad, in terminal leafy cymes or also solitary in 

 ihe axils; sepals oblong, longer than the 2-parted petals; stamens 2-10 ; capsule 

 ovoid, longer than the calyx; seeds rough. A weed in waste places, meadows and 

 woods, common throughout N. Am. Naturalized from Europe, though possibly 

 native northward. Jan. -Dec. 



5. Alsine pubera (Michx.) Britton. Great Chickweed. (I. F. f. 1476.) 

 Perennial, 1-3 dm. high, branching, the stems and branches with two hairy lines. 

 Leaves oblong or ovate-oblong, 1-6 cm. long, their margins ciliate, the upper 

 generally sessile, the lower sometimes narrowed at the base or on broad petioles, 

 those of sterile shoots sometimes all petioled ; flowers 8-12 mm. broad, in terminal 

 leafy cymes ; sepals lanceolate, shorter than the 2-cleft or 2-parted petals ; capsule 

 subglobose, or ovoid, its teeth revolute after splitting ; seeds rough. In moist 

 rocky places, N. J. and Penn. to Ind., Ky., Ga. and Ala. May-June. 



