Cerastium 



Caryophyllaceae 



439 







Map 

 itellaria pubera 

 silvatica (Beguinot) Weatherby 



So 



Map 899 



Stellaria media (L.) Cyrill 



Bracts of cymes herbaceous or the upper pair sometimes slightly scarious on the 



margins or at the tip; petals shorter than the sepals, sometimes equaling them; 



anthers mostly 0.3-0.5 mm long; styles generally 0.5-1 mm long; annuals. 



Median leaves ovate or obovate, usually broadly so, 4-11 mm wide and 5-25 mm 



long, the apex usually rounded and subacute; plants usually 1-3 dm high, lower 



internodes usually not glandular; sepals longer than the petals, usually all 



sharply acute at the apex; pedicels shorter than the calyx; capsules mostly 5-8 



mm long and usually about 1.5 mm wide, the teeth generally less than 1 mm 



long 3. C. viscosum. 



Median leaves lanceolate, oblong-lanceolate or oblong, 3-15 mm wide and 1-7 cm long, 

 gradually narrowed to a subacute apex; plants generally 2-6 dm long; sepals 

 obtuse or acute at the apex but not sharply so; petals slightly longer to twice 

 as long as the sepals; pedicels much longer than the calyx; capsules mostly 

 11-13 mm long, the teeth usually 1-1.5 mm long; plants 1.5-6 dm high, the 

 whole plant glandular-hirsute 4. C. riutans. 



1. Cerastium vulgatum L. var. hirsutum Fries. (Cerastium vuU 

 gatum L., in part.) Common Mouse-ear Chickweed. Map 900. An infre- 

 quent to common chickweed throughout the state. A weed in lawns and 

 found in pastures, fallow fields, open woodland and along roadsides and 



railroads. 



Fernald & Wiegand say that the U. S. forms of Cerastium vulgatum L. 



belong to this variety and its form. 



Nat. of Eurasia ; throughout temperate N. A. 



la. Cerastium vulgatum var. hirsutum f. glandulosum (Boenn.) 

 Druce. (Cerastium vulgatum L., in part.) Common Mouse-ear Chick- 

 weed. Map 901. Habitat and distribution the same as that of the pre- 

 ceding. 



Nat. of Eurasia and probably local in N. A. 



2. Cerastium arvense L. (Pennell discusses this species and its varieties 

 in Bartonia 12: 3-12. 1930.) Field Chickweed. Map 902. It is to be ex- 

 pected that this plant with a distribution throughout Europe and Asia and 

 in North America would show a wide variation. Under this name are 



