146 Planta Lindheimeriana. 



marginatis; funiculis septo longe adnatis. — Prairies near 

 Victoria, on the lower Guaclaloupe ; 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. 



f V. grandiflora, Hook. Bot. Mag. t. 3464. var. p pinna- 

 tifida: foliis radicalibus majoribus interrupte pinnatipartitis 

 segmentis dentatis lobatisve, caulinis ssepe 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. argyrjea (sp. uov.) : perennis, pube lepidoto- 

 stellata undique argentea ; caulibus diffusis v. procumbentibus 

 foliosis ; foliis omnibus spathulatis integerrimis vel repando- 

 dentatis ; racemo laxifloro, fructifero elongato ; pedicellis ssepi- 

 us patentibus apice sursum curvatis ; silicula globosa estipitata 

 glaberrima stylo aequilonga oligosperma (loculis 16-18-ovu- 

 latis) ; seminibus immarginatis. — V. arctica var. ? Gray, PI. 



