﻿A New Southwestern Sophia. 



By T. D. A. Cockerell. 



Sophia halictorum. 



Annual ; branching from the base, spreading, bushy, but not 

 decumbent ; about 40 cm. high, or often taller, whitish-green, with 

 pubescence consisting of very short branched hairs, replaced on 

 the green peduncles mainly by hyaline knobbed glandular hairs, so 

 that the upper parts of the plant are not canescent : stems purple 

 at base :• leaves pinnatifid, with linear divisions : the lower leaves 

 bipinnatifid, the divisions all linear and rather long : flowers minute, 

 yellow: stamens considerably exceeding the petals: calyx with 

 sparse white hairs : mature pods pinkish, 1 1 mm. long, their 

 pedicels 5 or 6 mm. ; seeds in two very distinct rows, bright 

 orange, covered with minute tubercles arranged in longitudinal 



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series: pedicels divergent or slightly ascending, and the pods 

 4-carinate, entirely glabrous. 



Mexico 



pUx canescens, flowering in March and April and very 



Halt 



fie 



name. It occurs in dry places, also in the bottom land, but in 

 irrigated fields it is replaced by S. ochroleuca Wooton, which is 

 paler, more spreading, with yellowish-white flowers, more dissected 

 leaves with much shorter segments, and no knobbed gland-hairs 

 on the peduncles. In my bee-papers, I have referred to S. halic- 

 torum as Sisymbrium canescens, but it differs widely from that plant 



nd 



l* men 1 was lamihar with in Colorado) in its general appearai 

 leaves, flowers and fruit. (Compare the figures in Britton a 

 Brown, 111. Fl. 2 : 145.) I n som e respects it more resembles S. 

 Hartivegiana, but the segments of the leaves are longer and the 

 pedicels are conspicuously divergent. The flower is most like 

 that of 5. Hartwegiana, but the seeds are always conspicuously 

 in two rows. 



Mesilla Park, N. M., 



May 7, 1898. 



(460 ) 



