380 Dr Graham's Description of New or Rare Plants. 



Sisymbrium bracliycarpnn, No. 260. Richardson^ Bot. Append, to Frank- 

 lin's Narrative of First Journey. 



Description — Root fibrous, annual. Stem erect, slender, simple as raised 

 from seed in a pot, and crowded, (native specimen from Dr Richardson 

 branched,) a foot high, leafy. Leaves erect, nearly glabrous, lyrato-pin- 

 nate, pinnae on the lower deeply incised, somewhat blunt, on the upper 

 linear, scarcely toothed, channelled. Flowers very small, in terminal 

 corymbs, but rachis gradually elongating (to 3 inches), and, as well as 

 the upper j)art of the stem, slightly flexuose. Corolla yellow, petals 

 longer than the calyx. Style very short. Stigma bilobular, subcapitate. 



• Pedicels of the fruit elongated (to about 4 lines), spreading. Silique ra- 

 ther longer than the pedicel, uneven from the seeds within. Seeds ovate, 

 suspended by slender stalks. 



The plant was raised in a cold frame at the Royal Botanic Garden, Edin- 

 burgh, from seeds collected by Dr Richardson in his last arctic journey, 

 and flowered in June. 



Sisymbrium canescens ? 



S. canescens ? caule terete, ramoso, erecto, foliisque pinnatis subpubes- 



centibus, pilis adpressis, foliolis lanceolatis, serrato-incisis; floribus co- 



rymbosis, racemis fructus elongatis ; siliquis suberectis, ellipticis, pedi- 



cello longioribus, })etalis calycem vix sujierantibus. 



Sisvmbrium canescens, Richardson's Bot. App. to Franklin's Narrative 



of First Journey De Cand. Syst. 2. p. 474. ?—NuttaU, Gen. of N. 



Amer. Plants, 2.']- 0*8. ? 

 Descuiption — Annual. Stem erect, round. Leaves pinnated, leaflets 

 serrato-incised, elliptico-lanceolate. Flowers corymbose, small. Calps 

 subhispid, concave, nearly as long as the corolla. Petals yellow, entire, 

 limb roimded, equ"l in length to the claw. Filaments slender, rather 

 longer than the calyx ; anthers small. Stigma large, its lobes diverging. 

 Stgle distinct, though short. Siliques in racemes, longer than the pedi- 

 cels, elliptical, smooth, obscurely winged along the back of the valves. 

 Seeds oblong, brown, about 14 in each silique. Whole plant to the base 

 of the siliques of a glaucous appearance, from a close, dense, short, soft 

 tomentum. Lower part of the stem purple. 

 The plant was raised at the Royal Botanic Garden from the same collec- 

 tion of seeds, and under the same treatment as the last species. It pro- 

 duced its flowers in May. The seeds were only marked with the gene- 

 ric name by Dr Richardson, but the species seems the same with that 

 given by him to Professor Jameson under the name I have adopted. I 

 cannot, however, persuade myself that it is the same with the plant of 

 Nuttall, or De Candolle. The difi^erent comparative length of the pe- 

 dicels and siliques, which never varies in our specimens, and other 

 marks, seem to keep them distinct. 



Trachymene cocrulea. 



T. Goerulea; herbacea, foliis palmatis, tripartitis, laciniis incisis, mucrona- 

 tis ; umbella simplici ; petala obovata-subrotunda, stamina aequantia. 

 Description — Annual. Seminal leaves^ carried two inches above ground, 

 and bearing upon their summits the tunic of the seed, elliptical, gla- 

 brous, green on their upper, deep purple on their lower side. Herb 

 erect, and on every part, even to the outer surface of the petals, cover- 

 ed with spreading, unequal, glandular pubescence, from which exudes a 

 sub viscid juice. A7^m round, erect, branching, green. Lea ws alternate, 

 those from tlie root supported on petioles about as long as themselves, 

 palmate, 3 -parted, the lateral portions cleft, and all the segments in- 

 cised and mucronate, the stem leaves more entire and more sessile up- 

 wards. Umbels terminal or axillary towards the top of the stem, on 

 very long peduncles (about 7 inches), simple, many-rayed, flattish (above 

 2 inches across). Involucre many-leaved, (|ths of an inch long,) linear- 

 awl-shaped, mucronate, and strongly ciliated, reflected along the pe- 

 duncle while the flowers are expanded, brown, Rays white, filiform- 



