MACLOSKIE I COMPOSITE. 885 



33. NASSAUVIA ULICINA (Hook. f. sub Trianthus}. 

 Woody, depressed, glabrous. Leaves subulate, pungent, spreading-re- 

 curved, imbricating and sheathing at the base. Heads solitary at the 

 ends of the branches, about 3-flowered. Involucral scales few. Achenes 

 villous. Pappus of 3-5 pales. 

 Patagon. 



75. TRIPTILION Ruiz & Pav. 



Annual or perennial, erect herbs, with rather small, 3-5 flowered heads 

 in terminal corymbs, or occasionally solitary ; flowers all hermaphrodite. 

 Involucre ovoid or oblong, its scales few, acute, the inner 5 subequal and 

 erect. Receptacle small, nearly naked. Corollas bilabiate. Antliers 

 connate-tailed. Achenes obovoid, papillose. Pappus of 4-5 caducous 

 pales. Leaves scattered, often spinose-toothed or pinnatifid. Flowers 

 blue or white. 



Species 7, Chili to Patagon. Differs from Nassauvia chiefly in habit. 



TRIPTILION DUSENII O. Hoffm., n. sp. (Plate XXX, E.) 1 

 Low, erect, slender, annual, branching from the base or upwards, hispid, 

 with short hairs. Leaves small, appressed strigulose, sessile, with a broad 

 base ; oblong in outline, pinnately 5-cleft, with linear rachis, and short, 

 subacute segments. Floral leaves lanceolate, entire. Heads crowded at 

 ends of stem and branches, or solitary on the lower branches, pediceled, 

 the upper sessile. Involucral scales oblong, acute, green, with white, 

 hyaline margin, apically pubescent, about 5-nerved, subcarinate. Flowers 

 slightly exsert. Corolla (dry) white ; pappus snowy. 



Plant, including the root, 6-7 cm. high. Largest leaves, 9 mm. long, 

 inclusive of their dentiform segments, 2^ mm. broad, rachis \y 2 mm. 

 broad. Heads 6 mm., invohicre 4 mm. high. 



S. Chili; Los Angeles. Coll. Dusen, Jan. 29, 1896 (n. 214). 



1 TRIPTILION DUSENII O. Hoffm., n. sp. 



Annua gracilis humilis erecta a basi vel superne ramosa, pilis brevibus hispida, foliis parvis 

 appresse strigulosis, basi lata sessilibus, ambitu oblongis, pinnatim 5-fidis, rhachi lineari, segmentis 

 brevibus acutis vel subobtusis, latitudine circiter quartam rhacheos partem aequantibus ; foliis 

 floralibus lanceolatis integris ; capitulis ad apices caulis et ramorum glomeratis vel ad ramos 

 inferiores solitariis, plus minus evidenter pedicellatis, superioribus sessilibus, involucri squamis 

 oblongis acutis viridibus, margine albo-hyalino cinctis, apicem versum pubescentibus pluri- (ca. 5-) 

 nerviis, nervo mediano crassiore subcarinatis, floribus paulum exsertis, corollis (e sicco) albis ; 

 pappo niveo. 



