150 Plantce LindheimeriancB. 



a form of the same species, or perhaps of D. cuneifolia. To 

 the latter, as a slender form, or to D. micrantha, would seem 

 to belong D. filicaulis, Scheele, I. c. 



CAFPARIDACE^E. 



332. Polanisia trachysperma, Torr. &f Gr. Fl. 1. p. 669 ; 

 Gr. Gen. 111. 1. t. 79, fy 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. 



POLYGALACE^E. 



333. Polygala Lindheimeri (sp. ?iov.) : pubescens ; cau- 

 libus e radice incrassata lignea plurimis foliosis ; foliis alternis 

 subsessilibus coriaceis utrinque reticularis 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. Alyssoides, DC. Silicula ovata, valvis convexis rigidiusculis. 

 19. V. alpina, Nutt. in Torr. <?• Gr. Fl. 1. p. 102; Gr. PI. Fendl. p. 9. 



V. lasiocarpa, Hook. ined. (Vide Bot. Mag. sub t. 3464) is unknown to me. I 

 have seen no Texan species with other than glabrous fruit. 



V. argentea, Schauer in Linncea, 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. Lye. New York, 2, p. 166, from Dr. James's 

 Collection, is Ditliyraea Wislizeni, Engelm. in Wis. Rep. p. 96, which has recently 

 been met with, in flower only, on the Upper Canadian, by Mr. Gordon. 



