146 Plante Lindheimeriane. 
marginatis; funiculis septo longe adnatis.— Prairies near 
Victoria, on the lower Guadaloupe; February, in flower. 
Gravelly banks of streams, Fredericksburg; May, in fruit 
(577.) (Also, near Austin, Mr. Charles Wright.) —Stems 
numerous from the same root, rather stout, spreading or 
ascending, 5 to 10 inches long, leafy to the top. Leaves 
equally cinereous both sides, as well as the stem and pedicels, 
with a rather loose stellar pubescence; the cauline an inch 
or less in length; even the radical undivided and barely re- 
pand or repand-denticulate. Flowers bright yellow, smaller by 
about one third than those of V. grandiflora. ‘The remark- 
ably dense raceme becomes in fruit from two to four inches 
long, often ripening as many as fifty silicles; the lower pedi- 
cels usually subtended by leaves. Silicles two lines in diame- 
ter, slightly didymous as well as depressed, not strictly sessile 
on the receptacle as in V. grandiflora, but raised on a barely 
appreciable stipe. Style fully two lines long. Seeds small, 
not at all margined.— This well-marked species appears to 
be common in Texas, especially throughout the Western dis- 
tricts. But I do not find that it has yet been described. 
+ V. cranpirLora, Hook. Bot. Mag. t. 3464. var. 8 PINNA- 
viripa: foliis radicalibus majoribus interrupte pinnatipartitis 
segmentis dentatis lobatisve, caulinis seepe subpinnatifidis. — 
Prairies east of Victoria; February, in flower. The same 
form was gathered by Mr. Wright. — V. grandiflora is well 
distinguished from all the other species (of which a goodly 
number are now known in North America) by the unusually 
short style, the narrowly winged seeds, and the large flowers 
and pods. 
329. V. arcyrma (sp. nov.): perennis, pube lepidoto- 
stellata undique argentea ; caulibus diffusis v. procumbentibus 
foliosis ; foliis omnibus spathulatis integerrimis vel repando- 
dentatis ; racemo laxifloro, fructifero elongato ; pedicellis szpi- 
us patentibus apice sursum curvatis ; silicula globosa estipitata 
glaberrima stylo equilonga oligosperma (loculis 16—- 18-ovu- 
latis) ; seminibus immarginatis. — V. arctica var.? Gray, Pl. 
