20 
more or less curved pubescent pods which are flattened contrary to the 
narrow partition. 
1. G. camporum Gray, Low and suffruticose: leaves spatulate, rather broad 
(sometimes becoming as much as 2.5 em. ), repand to sinuate-dentate or even pinnati- 
fid, tapering to a petiole: pods narrowly linear, becoming elongated (2.5 cm. or more) 
and arcuate at maturity, tipped by a conspicuous style.—High prairies and limestone 
hills in mountains of extreme western ‘Texas. Var. ANGUSTIFOLIA Coulter has very 
narrow leaves but 2 to 4 mm. broad, mostly entire but occasionally sinuate-toothed.— 
Mountains of western Texas. 
2, G. linearifolia Watson. With the habit of the last, but the leaves linear, atten- 
uate at base, entire, 2.5 to 5 em. long: pods narrower, 12 mm. long or less, and not 
2mm. broad : style shorter.—Blutis of the Rio Grande and the Pecos and their tributa- 
ries in extreme western Texas. 
12. CAPSELLA Medic. 
Smooth or pubescent annuals, with abundant small white flowers, 
toothed or pinnatitid leaves, and short obcordate or oval many-seeded 
pods which are flattened contrary to the narrow partition.—The genus 
to which belongs the exceedingly common ‘ shepherd’s purse” (C. 
Bursa-pastoris Meeneh.), which must have found its way into Texas, 
though not yet reported. 
1. C. pubens Watson. From3 to 5 dm. high including the fully developed fruiting 
racemes which are from 15 to 25 em. long, rather stout and strict and loaded with 
pods: leaves elabrate, lanceolate or oblong, somewhat dentate, the lower inclined to be 
more sinnate-toothed and spatulate: racemes subcinereous with stellate pubescence: 
pods oval, inflated, cinereous with stellate pubescence, tipped by a short style.—In 
wet ground from the Pecos to the Rio Grande. 
13. THLASPI L. (PENNYCRESS.) 
Low glabrous herbs, with simple stems, rosulate entire or toothed 
lower leaves, oblong auricled and clasping upper ones, white or pinkish 
flowers, and cuneate-oblong usually emarginate pods with sharply 
keeled valves. 
1. T. alpestre L. Radical leaves petioled, ovate or obovate : pods acutely margined 
but not winged.—In the mountains of extreme western Texas. 
14, LEPIDIUM Tourn. (PEPPERWORT. PEPPERGRASS. ) 
Annuals or biennials, with pinnatifid or toothed or entire leaves 
tapering at base, small white or greenish flowers, and roundish much 
flattened pods, 2-winged at summit, and with seeds solitary in each 
cell.—The wings at summit give the pod the appearance of being 
notched. 
* Petals conspicuous : stamens 6. 
1. L. alyssoides Gray. Stems diffuse, branches minutely puberulent: leaves nar- 
rowly linear, mucronulate, very entire, lowest often pinnately lobed : racemes dense, 
corymbose: pods ovate, shortly winged above with acutish teeth, scarcely emarginate, 
with a very short style.—In the valleys of the Rio Grande and its western tributaries. 
** Petals very minute or wanting : stamens 2 or 4. 
2. L.intermedium Gray. Erect and branching. puberulent or glabrous: lower 
leaves toothed or pinnatifid, upper often entire, oblanceolate or linear: stamens 2: 
