MACLOSKIE: CALYCERACE^. 761 



Grisebach regards the above as a variation of B. anthemoides, with 

 broader leaf-segments, and sometimes with 10 or 5 involucral lobes. 



BOOPIS RIGIDULA PATAGONICA Hieron. 



Leaf-segments very narrow-linear. Involucres of larger heads 8-cleft, 

 of smaller heads 5-cleft ; the lobes triangular, ending in a subulate tooth ; 

 margins toothed. Flowers shorter. Calyx-segments 1-3 for each achene. 



N. Patagon., mostly by hills near Rio Negro; near mouth of Rio 

 Chubut. 



14. B. SCAPIGERA Remy. (Plate XXVI.) 



Stems numerous, scapiform, naked or sparsely leafy at top, 12-15 cm - 

 high. Radical leaves rosulate, spatulate, half-pinnatifid, long-attenuate, 

 glabrous. Upper leaves shorter, subentire. Heads terminal, solitary, 

 rarely 2. Involucre s-y-leaved, its leaves short, connate. Outer pales of 

 receptacle dilated-leafy ; inner narrow. Corolla tubular, its limb of 5 ob- 

 long, 3-nerved divisions. Filaments united at base. Style protruding, 

 subcapitate. Achenes crowned by the 5 persisting, obtuse calyx-leaves. 



Chili ; S. provinces ; by Hatcher near Rio Sta. Cruz. (Determined from 

 Remy's description in Gay's Flora chilensis.} 



15. B. SQUARROSA Miers. (B. australis Dene, non Gris.) 

 Glabrous, subcespitose ; stems or peduncles subscapiform, very numer- 

 ous. Radical leaves many, and other cauline ones shorter, linear-lanceo- 

 late, incised-serrate, the segments remote, angulate, mucronate, often sub- 

 recurved, narrowed to a long, flat petiole. Peduncles i -headed, leafy 

 under the apex. Involucre cup-shaped, 5-cleft beyond the middle. Seg- 

 ments linear, acute, toothed. Pales shorter than the flowers, linear- 

 spatulate. 

 Magellan. 



B. SQUARROSA var. 



Leaves and scapes shorter and thicker than in the preceding. 

 S. Patagon., by Rio Chico. 



2. GAMOCARPHA DC. 



Involucre dentate, consisting of about 6-12 scales, connate high up. 

 Receptacular fimbriae acute, connate in alveoli. Flowers all fertile. 

 Calyx-lobes 5, elliptical, obtuse. Corolla 5-cleft, lo-nerved. Anthers in- 



