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Pollard and Cockerel! New Plants from New Mexico. 179 

 Primula angustifolia Helenae. 



Leaves narrowly linear and, remotely denticulate; corolla lobes longer 

 and narrower than in the type; flowers white with a yellow eye. 



Type No. 404,913 in the United States National Herbarium, collected 

 on the summit of the Las Vegas Mountains of New Mexico (altitude 

 about 11,000 feet), June 29, 1901, by Miss Helen Blake, for whom it is 

 named. The typical P. angustifolia is common in the same region. 



Achillea laxiflora. 



Perennial, glabrous; leaves coarsely pinnatifid, the upper ones 5-6 cm. 

 long; divisions irregularly lobed or cleft, the ultimate segments acute; 

 inflorescence loosely corymbose, the peduncles long and inclined to 

 droop; heads turbinate, about 8 mm. high; bracts closely imbricated, 

 scarious, with a greenish keel; rays orbicular, usually large (5 mm. 

 broad in the dried specimen), pure white; achene linear, the apex 

 prominently scarious-margined, the sides scarcely so. 



Type No. 404,884 in the United States National Herbarium, collected 

 by Miss C. Ellis in the Sandia Mountains of New Mexico, at an altitude 

 of 8000 feet. The plant attracts attention by its loose and comparatively 

 few-flowered corymb and by the large heads with conspicuous orbicular 

 rays. The segmentation of the foliage is also of an entirely different 

 type from that observable in other western yarrows; and the apically 

 margined achenes afford a conspicuous character. 



