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1900 | BRIEFER ARTICLES 59 
at the summit, subcordate at the subsessile base, 4-6™" in diameter, 
about half as long as the internodes, entire; scarious stipules linear- 
filiform : capillary pedicels spreading, 3-4™™ long, borne in the upper 
axils or in short lateral or terminal one-sided bracteate cymes: sepals 
elliptical, herbaceous except at the white margin, 2™ long: petals very 
narrow, appearing like sterile filaments: fertile stamens 5: stigmas 
essentially sessile upon the ovoid ovary ; seeds pale brown, o.5"" in 
diameter, muriculate and crested. — Collected by C. H. T. Townsend 
and C. M. Barber, on the Sierra Madre, 8*™ southeast of Colonia Garcia, 
Chihuahua, 5 August, 1899, no. 231. Type in herb. Gray. 
Sisymbrium Wootonii. — Suberect glabrous herb, 5-6 high, 
branched above; stem glaucous, terete, leafy: leaves obovate-oblong, 
5-1o™ in length, 1.8-3™ in breadth, obtusish, cuspidate, entire, thin, 
somewhat glaucous at least on the lower surface, sessile and auriculate- 
clasping: pedunculate racemes about 6, erect; pedicels 1-2™ long, 
glabrous, spreading, scarcely thickened at the summit: sepals thin, 
white, broadly oblong, rounded at the apex, 4—-5™" long, considerably 
exceeded by the obovate-cuneate rather broad white petals: young 
pods 1.4 long, narrowly linear, erect upon spreading pedicels; style 
leaves 4° long, irregularly bipinnatifid, the terminal segments linear- 
exceeding the lateral ; petioles provided with small round 
Clasping auricles at the base: racemes elongated ; pedicels spreading, 
filiform, 1 in length, scarcely thickened at the summit : flowers rather 
small: sepals ovate-oblong, obtuse, pale-yellow, 1.7™™ long: petals 
Sulphur-yellow, fading white, 2-3™" long: pods erect or curved-ascend- 
ote long, 2™" in diameter, tipped with a short slender style 
aring a minute nearly circular stigma; seeds in two rows.—Col- 
—e by C. H. T. Townsend and C. M. Barber on the Sierra Madre, 
: Southeast of Colonia Garcia, Chihuahua, 2 June, 1899, no. 43. 
nt hs in herb. Gray. Readily recognized by its minute orbicular ear- 
'X€ appendages at the slightly broadened base of the petiole. 
