46 Nelson and Cockerell New Plants from New Mexico. 



above; leaves broadly oblong in outline, 4-6 cm. long; the segments 

 oblong, acute, 8-12 mm. long; the lower distinct and subpetiolate, the 

 terminal crowded and slightly confluent; the petiole short or in the 

 uppermost leaves wanting; flowers terminal or from the uppermost 

 axils, in congested corymbs; calyx-lobes about equaling the campanu- 

 latetube; corolla purple, campanulate, 10-12 mm. long, quite as broad, 

 the tube short, its lobes broadly ovate, moderately obtuse; filaments 

 narrowly margined, shorter than the corolla, somewhat incurved, glab 

 rous but involved in dense fine pubescence at the insertion; style fili 

 form; the stigmas narrowly linear, exserted; ovules few, apparently 

 only 2 or 3 maturing; the seeds narrowly wing-margined and subcon- 

 cave ventrally. 



This species has for its nearest allies P. filicinum Greene and P. Arch- 

 ibaldae A. Nelson, but it is a much smaller plant than either, with larger 

 corolla and very different seeds. Collected at Cloudcroft, Sacramento 

 Mountains (Canadian Zone), N. M., by T. D. A. Cockerell, September, 

 1900. Type in Rocky Mountain Herbarium. 



Mertensia caelestina, n. sp. 



Low and leafy, 5-15 cm. high, perfectly gabrous except for the ciliate- 

 scabrous edges of the leaves and the calyx-lobes; leaves 2-3 cm. long, 

 elliptic-oblong, tapering to both ends, subacute, the basal short-petioled; 

 flowers congested in terminal clusters; pedicels short, slender; calyx 

 cleft nearly to the base; calyx-lobes linear, subacute, about 5 mm. long; 

 corolla dark-blue about 12 mm. long, tube a little longer than the calyx 

 and the limb, the lobes broadly or truncately obtuse, the pubescence of 

 the ring at the base coarse and conspicuous, appendages of the throat 

 yellow; filaments dilated, as broad as or broader than the anther. 



Collected by Mrs. Wilmatte P. Cockerell, No. 40, Truchas Peaks, 

 N. M., above timber line (Arctic-Alpine Zone), 1902. Type in Cockerell 

 Herbarium. 



