1913] NELSON & MACBRIDE—WESTERN PLANTS 475 
cauline mostly trifid, the middle tooth the largest; the uppermost 
tridentate: flowers showy, the broad petals about twice the length of 
the sepals: fruiting pedicels slender, spreading, about three times 
the length of the pod: pod ovate, 3-4 mm. long by about 2 mm. 
broad, the narrow blunt apex slightly notched, the style less than 
twice the length of the scarcely involute apical wings. 
No. 32, from alkaline bottom lands, Falk’s Store, Idaho, May 17, 1910, by 
MACBRIDE, is the type. No. 2023 by Cusick, near McDermitt, Oregon, may 
possibly be a pubescent form. 
This is another member of the alyssoides group. Its pod allies it to L. 
alyssoides and L. Jonesii; its leaves to L. papilliferum; its aspect and habitat 
differ from all relatives. 
Much has been made of differences shown by Sisymbrium and 
Sophia in the field, but, in common with many others, the writers 
are unable to see that each has vegetative characters so marked as 
to constitute generic differences. Believing that one genus should 
include them all, the following are transferred to Sisymbrium. In 
this connection it may be noted that Descurainia should replace 
Sophia only in the event that the latter is kept distinct. 
/Sisymbrium paradisum, n. comb.—Sophia paradisa Nels. and 
Ken. Proc. Biol. Soc. Wash. 19:155. 1900. 
/Sisymbrium leptophyllum, n. comb.—Sophia leptophylla Rydb. 
Bull. Torr. Bot. Club 29:239. 1902. 
~ Sisymbrium ochroleucum, n. comb. 
Bull. Torr. Bot. Club 25:455. 1898. 
/Sisymbrium peta ie comb.—Sophia obtusa Greene, Leaflets 
1:96. 1904. ; 
ees AND ITS SEGREGATES.—There being substantial 
agreement among botanists now in excluding the met oa 
from this continent, the question arises as to the position te) ap 
species formerly referred to it and to Echeveria. This question s 
recently been answered by reestablishing Echeveria for a igh . 
creating new genera for some of the more aberrant forms. a a 
however, that the differences relied upon to sustain some 0 ee 
segregates are at best merely relative, and often rere a 
and unreliable, in this group. These characters are thes = ee 
leaves, the length or breadth of the corolla, its angulation ¢ 
—Sophia ochroleuca Woot. 
