390 PATAGONIAN EXPEDITIONS : BOTANY. 



(Eur.) ; S. Patagon., in gravelly meadows by San Julian ; Chubut, 

 common in elevated plains. 



8. CERASTIUM VULGATUM Linn, (including C. triviale Link). 



Tufted, viscid-pubescent. Leaves linear, obtuse. Flowers lax-cymose. 

 Pedicels at length exceeding the sepals. Capsules curved upwards. 

 (Eurasia; N. Amer.) ; Magellan; Falklands, introduced. 



6. S AGIN A Linn. Pearl-wort. 



Tufted herbs, with subulate leaves and small, pediceled, whitish flowers. 

 Sepals 4-5. Petals 4-5, entire or emarginate, or none. Stamens varying 

 to twice as many. Ovary i -celled ; ovules many. Styles as many as the 

 sepals. Capsule 4~5-valved, dehiscing to the base ; valves antisepalous. 



Species 10, of the N. Hemisphere. 



i. S. APETALA Linn. 



Erect or ascending, filiform annual, 2-10 cm. high. Leaves linear-sub- 

 ulate, glabrous or subciliate, 2-8 mm. long. Flowers 2 mm. broad or 

 less ; on erect, capillary pedicels. Sepals 4, obtuse ; petals none or 

 minute. Capsule exceeding the perianth. 



(Eur., N. Amer.) ; N. Patagon., meadows by Rio Negro. The Patago- 

 nian forms are glabrous, of two varieties : ( i ) melanopotamica, with long 

 internodes ; (2) paludosa, erect and rigid, only 1-3 cm. high, leaves long- 

 acutate-aristulate. 



2. S. PROCUMBENS Linn. 



Plant depressed, 25-75 mm. high. Flowers mostly 4-merous. Petals 

 short, usually present. Capsule at length nodding. Seeds dark red, pitted. 



(Eurasia and E. N. Amer. and in S. Amer. Cordilleras.) Falklands, 

 abundant near the sea. Fuegia (?). 



7. COLOBANTHUS Bartl. 



Cespitose herbs, often fleshy, with imbricate leaves and mostly solitary, 

 stalked flowers. Sepals 4-5, free. Petals none. Stamens, styles and 

 valves of the capsule as many as and alternate with the sepals. 



Species 10, in mountains of Antarctic Amer. and of Chili. Also in 

 Austral., N. Zeal., Kerguelen and Amsterdam and Auckland Is. 



