MACLOSKIE : CARYOPHYLLACE^E. 389 



3. CERASTIUM COMMERSONIANUM Ser. (C. chilense Baill.) 



Stem dichotomous, angular, viscid. Leaves linear, very long, sessile. 

 Flowers dichotomously umbellate. Sepals lanceolate, acute, scarcely 

 membranaceous on margin. Petals and capsule as long as the sepals. 



"Distinguished from C. arvense mainly by the foliaceous bracts with 

 the edges not scarious." (J. Ball.) 



(Montevideo ; Argentina) ; N. Patagon. 



4. C. FUEGIANUM Alboff. 



Low, cespitose, glandular-pubescent. Leaves many, nearly I cm. long, 

 lance-elliptical to linear-oblong, sessile, united at base, subobtuse, nerves 

 prominent underneath. Flowers I (2), terminal, short-peduncled, 2- 

 bracted. Sepals lanceolate, glandular. Petals oblong-obovate. 



S. Fuegia, Ushuaia. 



5. C. GLOMERATUM Thuill. (C. viscosum L.) 



Stem hairy, viscid, spreading. Leaves ovate or obovate, obtuse, viscid. 

 Bracts small, herbaceous. Flowers in glomerate cymes, at length panic- 

 ulate. Petals shorter than the acute sepals. 



(Eur., nat. in N. and Cent. Amer.) ; N. Patagon., not rare by Lago 

 Nahuel-huapi and Rio Negro. 



C. MAGELLANICUM Phil, is probably C. arvense L., changed in habit and 

 form of leaves and indumentum. Rohrbach in Linnaea, 37, 304. 



6. C. SEMIDECANDRUM Linn. 



Small, or 5-stamened Chickweed. Low tufted annual, finely viscid- 

 pubescent. Leaves ovate-obtuse, only 4-8 mm. long. Cymes with the 

 pedicels at length exceeding the sepals. Flowers small ; stamens usually 

 4 or 5. Petals shorter than the sepals. 



(Asia-minor, Eur. ; E. United States) ; by water courses at Bahia 

 Blanca and probably in N. Patagon. 



7. C. STRICTUM Linn. 



Perennial, with declinate stems ; leaves sublinear, acuminate, glabrous 

 or subhirsute. Peduncles glandular-pubescent. Petals twice as large as 

 calyx. Capsules oblong. 



