98 



are straight, others hooked, 4-ceIled, 4-5eeded ; seeds somewhat flat- 

 tened, broadly ovate or more or iess irregularly orbicular, attached to 



the outer side of the cell near the base. 



^ Growing in deep sand on the banks of the Upper Gila River and 

 Its tributaries, climbing high over willows, flowering in February and 



March. 



Willow Serines, Ari- 



zona, by Dr. Palmer, are, by Mr. Watson, identified with this. Mr. 

 H. H. Rusby obtained the same in flower only in a canyon of the 

 San 'Francisco River in the same Territory, a few miles above the con- 

 fluence of that stream with the Gila; but the material whence this 

 description js drawn, was obtained by the writer in March and April 

 of this year, at a locality still further east, namely, the canyon 

 of the Upper Gila in Grant County, New Mexico, within fif- 

 teen miles of the dividing ridge between the Pacific and Atlantic 

 slopes of the continent. The species is most nearly related to M. 

 muricata, Watson ; but that has its leaves strongly glaucous beneath, 

 with lobes widening above and showing a continuously-toothed mar- 

 gin, fertile flowers without abortive stamens, and with fruit which is 

 nearly or quite smooth. Its globose, marginless seeds are also pe- 

 culiar. Mature seeds of M. Gilensis have not, indeed, been seen, 

 but in the fruits collected in April they were full grown and partially 

 hardened, showing the fla»ttened, irregularly-orbicular outline of 

 those of N. Marah, Watson, between which and M. muricata this 

 new species will have to be placed. 



J Senecio Cardamine.— Completely glabrous; radical leaves on 

 slender petioles, cordate-orbicular or -ovate, the margin sinuate-den- 

 ticulate, the under surface purple, the upper dark green and marked 

 with conspicuous, whitish or purple veins, those of the stem remote 

 and inconspicuous, from lyrate-pinnatifid to triangular-lanceolate, 

 all with a broad clasping base; stems a span to a foot high; heads of 

 middle size, solitary or 3-5 corymbosely arranged; involucre x lines 

 long^ scarcely calyculate; rays about 8. rather pale yellow 



On cold northward slopes of the higher Mogollon Mountains. 

 April, 1881. 



In the dried specimen the color of the ravs has become almost 

 gold-yellow, and the plant seems closely to resemble certain common 

 states of S. aureus, L., a species which also abounds in the Mogollon 

 Mountains, running into many variations. From all these, however, 

 the living plant here characterized differs so strikingly in aspect that 

 when I first saw it, showing the leaves only, I judged it to be some 

 species of Cardamine, and was greatly surprised when, in flowering. 

 It manifested itself a Senecio. The dark-colored, beautifully-veined 

 leaves lie flat upon the ground, and have strongly the appearance of 

 those of Cardatntne purpurea, Torr & Gray 



Ulf.'"'' -S"" ^o^^E^V"-"^^^'' ^^^'^ ^ f°°^ ^'g^' ^" Ihe younger parts 

 white with a dense close wool, much of which disappears with aee ■ 



sinn^t/tnnt. ^rfi:^^'''°^'^' *^^ ^^^^'^^^ ^^''-^'^ *« «bl°"g -ith margins' 



sinuate-toothed, the upper oblong-lanceolate in outline, and irregu- 



c ; n^^'lT' I ^'^'^'J''"' ^^^g"' '^ a terminal corymb; involucres 

 5 lines long, naked at base, scales broad and rather obtuse; rays 8- 



