370 Pollard: The Genus Achillea l\ North America 



Type In the U. S. National Herbarium (no. 238094) collected 

 by Mr. H. W. Henshaw on the Californian sea coast at Santa 

 Ysabel, May, 1893. The same plant is found at other points on 

 the coast line, notably at Santa Barbara. In many respects this 

 species exhibits the characters of a true halophytc. 



■ 6. Achillea asplenifollv Vent. Hort. Cels. /. gj. 1800 

 A. rosea Desf. Tabl. Hort. Par. ed. i : 105. 1804. 



Stem villous, usually simple : leaves glabrate, regularly bipia- 

 nate or even tripinnatifid, the rachis slightly margined : segments di- 

 varicately spreading, their divisions more or less lobed, linear and 

 acute : petiole with dilated margined base, the pinnae little reduced 

 below : cor}-mb dense : involucral scales very sparsely hairy, with 

 green centers and scarious, ciliate margins, often somewhat rufous 



at apex: rays 2-4 mm. in diameter, rose -purple: achenes linear, 

 very slightly winged. 



Occurring only in cultivation, the original habitat unknown. 



There are two specimens of this remarkable species in the 

 National Herbarium ; one collected at the Botanical Garden by 

 Schott, and one obtained from a garden at Oneida, N. Y., by Mr. 

 William "R. Maxon. I have also noted a plant in the Harvard 

 Herbarium, collected by Sartwell at Penn Yan, N. Y., which, al- 

 though the label does not indicate it, was doubtless from a culti- 



^ 



vated Individual. It is frequent In l^uropean gardens, thus giving 

 color to the supposition that it originated as a horticultural variety ; 

 at present, however, it is abundantly distinct from any rosc-raycd 

 form of the wild yarrow. 



7. Achillea gigantea sp. nov. 



Plant robust and much branched, nearly i m. in height, the 

 main stem i cm. in diameter, sulcate and densely clothed like the 

 foliage, with long villous hairs ; leaves on the main stem 8-10 cm. 

 long, those on the branches 4 cm. long, linear lanceolate In outline, 

 biipnnatifid with coarse closely approximate pinnae, these scarcely 

 at all reduced toward the sessile, almost auricled base : ultimate 

 segments from linear to ovate, usually obtuse : corymb many- 

 branched, long-stalked, circlnate, the branchlets densely pubescent : 

 heads 5-6 mm. in height, the involucral bracts carinate, greenish 

 throughout: rays very small, scarcely exceeding i mm : achene 

 elliptical, obscurely winged : style but little exscrted. 



Type 



Herbarium (no. 279104) collected 



