150 Planta Lindheimeriane. 
a form of the same species, or perhaps of D. cunezfolia. To 
the latter, as a slender form, or to D. micrantha, would seem 
to belong D. filicaulis, Scheele, l. c. 
CAPPARIDACE:. 
332. Povanisia TRACHYSPERMA, Torr. & Gr. Fl. 1. p. 669 ; 
Gr. Gen. Ill. 1. t. 79, & Pl. Fendl. p. 10. Sandy soil, on 
the Colorado and Pierdenales. July, October. This differs 
from P. uniglandulosa, as I have formerly remarked, princi- 
pally in the smaller size of the flowers. It is likely to prove 
only a northern form of that species. 
POLYGALACEZ. 
333. Potyeata LinDHEIMERI (sp. nov.): pubescens ; cau- 
libus e radice incrassata lignea plurimis foliosis ; foliis alternis 
subsessilibus coriaceis utrinque reticulatis nitidis cuspidato- 
mucronatis, imis obovatis, superioribus gradatim ovatis oblon- 
gis et lanceolatis ; racemis terminalibus demumque lateralibus 
laxifloris ; rachi geniculato-flexuosa bracteis parvis ad nodos 3 
persistentibus squamosa ; pedicellis brevissimis ; sepalo supe- 
riore bracteiformi a flore. subdistante alis spathulatis vix di- 
midio brevioribus ; carina imberbi crista calcariformi aucta ; 
capsula immatura pilosula.— Rocky declivities of the upper 
Guadaloupe and Pierdenales. June, August. Also met 
with by Mr. Wright, from the Colorado to the Rio Grande. — 
Root not unlike that of Krameria lanceolata, long, covered 
with a thick reddish bark. Stems a little woody at the base, 
Sect. II. Aryssorpes, DC. Silicula ovata, valvis convexis rigidiusculis. 
19. V. aueina, Nutt. in Torr. G Gr. Fl. 1. p. 102; Gr. Pl. Fendl. p. 9. 

V. lasiocarpa, Hook. ined. (Vide Bot. Mag. sub t. 3464) isunknowntome. I 
have seen no Texan species with other than glabrous fruit. 
V. argentea, Schauer in Linnea, 20, p. 720, when the mature fruit is known, may 
prove to be a species of Synthlipsis. 
V. didymocarpa, Hook., and V. Geyeri, Hook. constitute the genus Physaria. 

The Iberis, n.sp.? Torr. in Ann. Lyc. New York, 2, p. 166, from Dr. James’s 
Collection, is Dithyrea Wislizeni, Engelm. in Wis. Rep. p. 96, which has recently 
been met with, in flower only, on the Upper Canadian, by Mr. Gordon. 
