• CRUCIPERiE. 59 



curved, spreading pods are an inch and a half or more in length, on 

 pedicels over half an inch long. 



2. Sisymbrium mtriophyllum, Humb. & Bonpl. 



S. myriophyllum, Humb. & Bonpl. in DC. Syst. 2, p. 477, & Prodr. 1, p. 194 ; 



Benth. PL Hartw. p. 159 ; Walp. in Rel. Meyen. p. 249. 

 S. pimpinellifolium, Barn, in Gray, Fl. Chil. 1, p. 129. 



Hab. Banos and Obrajillo, Andes of Peru. 



Ours accord with Jameson's and Hartweg's specimens from Anti- 

 sana : and S. pimpinellifolium, from the Cordilleras of the northern 

 part of Chili is the same species * The seeds occupy two series in 

 each cell as distinctly as in S. canescens (vide Gray, Gen. Am. Bor. 

 Or. 111. 1, t. 64), and other species of the section Descurea (Besciv- 

 rainia, Webb), and one specimen has the dissepiment fenestrate or 

 abortive, as in the following species. 



3. Sisymbrium athrocarpum, Sp. Nov. (Tab. 3). 



S. cano-tomentosum ; foliis pinnatisectis, segmentis oblongis pinnatipar- 

 titis, lobis ovalibus confertis; floribus fructibusque capitato-corymbosis 

 arete congestis ; siliquis brevissimis oblongis tetragonis florem marces- 

 centem bis terve tantum superantibus ; septo late fenestrate vel evanido ; 

 seminibus biseriatis. 



Hab. Obrajillo, and from Culnai to above Casa Cancha, in the high 

 Andes of Peru. (Andes of Peru, Mr. McLean, in herb. Hook.) 



Root apparently annual. Stems from 2 inches to a foot high, 

 clothed, as is the foliage, &c, with a soft Jwary wool. Leaves an inch 

 or two in length, narrowly oblong in circumscription, pinnately dis- 

 sected into from 13 to 19 subsessile segments or leaflets : these are 

 oblong, and pinnately parted or cleft into from 9 to 15 oval, entire, 



* Sisymbrium Titicacense, Walp. Kel. Meyen. p. 249, or, at least, a plant in the 

 Hookerian herbarium, from Titicaca, which accords with the character, is apparently 

 only the short-fruited form of Nuttall's S. canescens. 



