60 . CRUCIFER^. [Sisi/mbrium, 



2. H. pygmcBa; follis lineari-lanceolatis basi attenuatis integris dentatisve, pube bipar- 

 tita appressa, siliquis numerosis erectis compressis pubescentibus, caule erecto simplici. 

 (Tab, XIX.)— Cheiranthus pygnia^us. ''Adams in Mem, Soc. Nat Mosc, 5. />. 114." 

 DeCand. SysL Veget v. 2. p. 187, Prodr. v. 1. p. 137.— C. Pallasii? Pursh, FL Am, t\ 

 2. p. 436. De Cand, Prodr, v. I, p. 136. 



Radix annua, subfiisiformis, parce fibrosa. Planta tota, (pctalis staminibusqiie exceptis,) pube bipartita, 

 arctissime appressa atque longitudinalltcr disposita magis minusve tecta. Caulis solitarius, erectus, simplex, 

 vix digitem longus, nisi fructiferus, ubi spithamieus, paululum flexuosus, teres, subangulatus, purpureo- 

 viridls, parce foliosus. Folia pleraque radicalia, quje numerosissiraa, pateutia, lioeari-Ianceolata, acuta vel 

 acuminata, basi in petiolum longiusculum attenuata, inten^a, subdentata, nunc sinuato-dentata : caxdina 

 radicalibus similia sed mliiora. Corymhus multiflorus, demum, fructiferus, longe racemosus. PedicelU 

 calycis longitudlne. Calyx erectus, sepalis linearlbus obtusis, duobus basi saccatis. Petala magna, pur- 

 purea, obovata, unguiculata, vcnosa. Stamina calyce paulo longiora. Antherce liueares. Pistilhnn: Germen 

 lineare, compressum ; Stylus bvevis : Stigma bilobum, lobis erecto-conniventibus, iutus glandulosis, albidis. 

 Siliquoi numerosae, crectse, rel erecto-falcatte, lineari-ensiformes, compressa?, pallide purpureo-fuscce, stigmate, 

 nunc obscure bilobo, ternainatse. Valves fere oranino plana?, pubcscentes, linea media longitudinali elevata 

 notata-, ad marginem aequales. Semina uniserialia, subovalia, pallide fusco-aurantiaca. podospermum 

 gracile. lladicula cotyledonibus paululum longior, dorsalis. 



Hab. On the nortb-^rest shores of America, opposite Kamtschatka. Herb. Pall. Bear Lake, and thence 

 to the shores of the Arctic Sea. Dr. Hichardson. Cape Lisburne and Kot2ebue*s Sound. Lay and Collie 

 in Capt. Beecliey^s Collection. — The place of growth of the Cheiranthus Pallasii of Pursh, so nearly corres- 

 ponding with that of our plant from Captain Beechey's Collections, together with the description of De 

 Candolie, taken from the original specimens in Mr. Lambert's Herbarium, give me great reason to believe 

 that it is identical with that which I here figure and describe. Indeed, De Candolle's character is at variance 

 only in one point, namely, where he speaks of the siliqucB as teretiusculce, whereas ours are plane. I 

 am assured by ray excellent friend Mr. Prescott, that our plant is the same with the Cheiranthus pygmesus of 

 Adams and De CandoUe, and the description is characteristic; but when I came to examine the seeds, I 

 found it necessary to remove it from Cheiranthus and the rest of the Pleurorhizece, and to place it among the 

 NotorhizecB, where I presume it will rank in the present genus, notwithstanding the very flattened nature of 

 the siliqiia. Its place should be near Hesperis aprica of Poiret and De CandoUe, with which it agrees in 

 general habit and size, differing in the narrower leaves, not hispid, but clothed with closely appressed, bipar- 

 tite hairs, and in the more numerous and greater length of the seed-vessels. This species is probably scarcely 

 found to the south of the arctic circle. 



Tab. XIX. Fig. 1, Flowering plant, a.nd Jig. 2, Plant iu fruit:— natural size. Fig. 3, 3, 3, Leaves; j^^. 

 4,. Hair; Jig. 5, Sepal; ^y. 6, Petal; ^^. 7, Stamens and pistil; Jig, 8, Pistil; ^g. 9, Siliqua :— natural 

 size. Fig. 10, Seed; fy. 1 1, Section of do. :— all hut^gs. 1, 2, and 9, more or less magnijied. 



3. H, Menziesii; foliis spatliulatis carnosisj pube bipartita appressa, siliquis (junioribus) 

 patentibusj caule brevissirao erecto simplici. 



Hab. CaUfoniia. Mr. Menzies. — My specimens of this plant are imperfect; but it has a great similarity 

 with the preceding, whence 1 am led to arrange it here. The root is very long, woody, branched, perennial. 

 The leaves mostly radical, vastly broader than the preceding, and truly spathulate, somewhat fleshy; and, as 

 are the stem, pedicels, and cali/j:, sparingly clothed ^>ith bipartite and appressed pubescence. Flowers rather 

 larger than //. pygmcea ; but from being ill dried, I am unable to say whether they are purple or not. Young 

 pods much spreading. This has all the appearance of being a truly perennial plant. 



19. SISYMBRIUM. All. 

 Siliqita teretiuscula, super torum sessilis. Stigmata 2, subdistincta aut in capitulum 



