Cochlearia. CRUCIFEKyE. 145 



* * * * Flowers large, both the petals and sepals deep purple : pod slender but some- 

 what compressed ; cotyledons accumbent. 



B. pygmseum, Gay. Dwarf biennial with simple stem and very numerous crowded linear 

 or narrowly lance-linear entire or few-toothed leaves, pubescent with appressed 2-pointed 

 white hairs: inflorescence very dense : sepals oblong strongly saccate at the base; margins 

 thin, white ; petals 5 to 9 lines long : pedicels ascending, 2 to 4 lines in length : pods pubes- 

 cent, scarcely tapering at all at the apex ; stigma slightly 2-lobed. — Gay, 1. c. 4. Cheiran- 

 thiis ptjgnKEUs, Adams, Mem. Soc. Nat. Mosc. v. 114. C. Pallasii, Pursh, Fl. ii. 436. Eesperis 

 pi/gmcea, Hook. Fl. Bor.-Am. i. 60, t. 19. H. minima, Torr. & Gray, Fl. i. 90. H. Pallasii, 

 Torr. & Gray, 1. c. 667.* H. Hookeri, Ledeb. Fl. Ross. i. 174. Sisymbrium pi/gmceu?n, Trautv. 

 Act. Hort. Petrop. i. 60. — Arctic America from Greenland to Alaska. (Siberia.) 



33. COCHLEARIA, Tourn. (Latin cochlea?-, spoon, from the form of the 

 leaves.) — Glabrous succulent herbs of Northern Hemisphere, chiefly boreal and 

 arctic, often maritime. — Inst. 215, t. 101; L. Gen. no. 528; DC. Syst. ii. 358, 

 & Prodr. i. 172 ; Reichenb. Ic. Fl. Germ. ii. t. 17. — Considering its moderate 

 size, one of the most confused and difficult genera of the order. Until all mem- 

 bers of the group can be subjected to a thorough revision, the certain identifica- 

 tion of our American forms with the closely related European species is impossible. 

 However, as the occurrence of the Euroj)ean C. Anglica, 0. Danica, and C. offi- 

 cinalis in Arctic America rests upon the high authority of Sir William Hooker, 

 Torrey & Gray, and others, it seems best to continue to enumerate them, although 

 no specimens from this continent in American herbaria can be cited as exactly 

 representing the typical gerontogeous forms. The remaining species are here 

 interpreted nearly as in Lange's careful treatment of the genus in his Conspect. 

 Fl. Groen. [By B. L. Robinson.] 



C. Anglica, L. Radical leaves loug-petioled, ovate or sub-orbicular, rounded at the base or 

 slightly and broadly cordate, subentire ; lower cauline leaves similar, short-petioled ; the mid- 

 dle and upper ovate-oblong, sparingly and bluntly toothed, sessile by a more or less auricu- 

 late base: capsule subglobose, reticulated with prominent veins. — Syst. Nat. ed. 10, 1128, 

 & Spec. ed. 2, ii. 903 ; DC. Syst. ii. 364 ; Hook. Fl. Bor.-Am. i. 57 ; Torr. & Gray, Fl. i. 109. 

 — Anticosti, Macoun ; coast of Labrador to the Arctic Ocean and Alaska. A species dubi- 

 ously distinguished from the following by its reticulated capsule. 



C. officinalis, L. Very similar to the preceding in habit and technical characters : leaves 

 somewhat more inclined to be lobed, and the radical more deeply cordate : pods globose, 

 smooth or obsoletely reticulate-veined. — Spec. ii. 647; DC. 1. c ; Hook. 1. c. — Shores of 

 the Arctic Ocean, ace. to Hooker and others. Specimens with the large flowers of the 

 European form have not been seen from America by the writer. Our commonest Cochlearia, 

 however, extending from Vancouver Island, Macoun, to Alaska, corresponds in all essential 

 points with this species save in its smaller flowers and often more stunted growth, differences 

 ascribable perhaps to climatic influences. 



C. tridactylites, Banks. Cauline leaves coarsely sub-trilobed with a single obtuse tooth 

 on each side : silicels ovate-globose, as large as in the last ; style short, capitate ; seeds 2 to 

 4 in each cell. — Banks in DC. 1. c. 367 ; Hook. 1. c. — Labrador, Banks. No specimens 

 accessible to the writer exactly represent this imperfectly described species (here charac- 

 terized from the original description). Enough are at hand, however, to show much varia- 

 tion in the tootliing of the leaves without cliange of more essential characters, thus casting 

 nauch doubt upon tlie distinctness of a species separated upon this feature alone. Lange 

 may be right in referring the plant doubtfully to C. Grwnkmdica, or it may be a form of 

 C. Anglica. 



C. Danica, L. Leaves smaller than in the first two species, only 1 J to 2 or 3 lines in di- 

 ameter, " all petiolate," deltoid, and hastately toothed at tlie ba.se : capsule ovate to ellip- 

 soidal, nearly or (juite as long as the pedicel. — Spec. ii. 647; Fl. Dan. t. 100; Eng. Bot. 



10 



