OF ARTS AND SCIENCES: NOVEMBER 11, 1863. 235 



Labrador, good flowering specimens in the herbarium of Schweinitz ; 

 from Arctic America, one in Dr. Torrey's herbarium, ticketed '' 0. 

 campestris (Parry) by Sir William Hooker (which may perhaps be 

 his 0. campestris var. melanocephala, but the short peduncles are at 

 most two-flowered), and one from Richardson named by him 0. arctica ; 

 from the Rocky Mountains, Sir William Hooker's 0. arctica S, of 

 Drummond's collection ; — all the above in blossom only ; and, finally, a 

 fruiting specimen of the latter from Bourgeau's collection. This, with 

 its thin-walled inflated legume on a slender stipe (which stipe is evident 

 enough in such flowers of the above as I could venture to dissect), 

 is thus shown to differ essentially from the original 0. arctica, which 

 has the coriaceous nearly sessile legume, along with other characters 

 of 0. Uraleiisis. The present species is surely more nearly related to 

 0. physocarpa, Ledeb., differing however in its stipitate and pointed 

 pod, and in the merely conjugate, but much crowded leaflets. 



§ 3. Can^])estres. Legumen coriaceum seu chartaceum, nee vel parum 

 vesicarium, in calyce sessile vel substipitatum, sutura ventrali 

 septifera fere vel semi-bilocellatum, sutura dorsali raro subintrusa. 

 Acaules : stipuljE petiolo alte adnatae : scapi raro 2-4-flori, sfepius 

 pluriflori ; floribus capitatis spicatisve ; leguminibus erectis. 



* Foliola conjugata. 



-1— Scapi 2-5-flori, 



3. 0. Uralensis, L. var. pumila, Ledeb. Fl. Alt. 0. arctica, 

 R. Br. ; Hook, pro parte. 0. Uralensis, var. arctica, Ledeb. Fl. Ross. 

 0. lagopus, Nutt. in Torr. & Gray, Fl. — Arctic shores and islands ; 

 and Rocky Mountains to about lat. 40°, Nuttall, Hall and Harbour, 

 no. 143. — I can well believe that this is an arctic-alpine form of 

 0. Uralensis. The legumes are oval-oblong or elongated-oblong, with 

 the partition from the ventral suture stretching across to the dorsal. 

 But neither in this nor in Siberian specimens of genuine 0. Uralensis 

 (I have no fruiting European) do I detect any wing or rudiment of a 

 septum projecting from the dorsal suture, as described by authors. 



-i— -i— vSpicfe vel capitula pluriflorae. 



4. 0. CAMPESTRIS, L., cum syn. Ledeb. & Hook. f. 0. viscida, 

 Nutt. in Torr. & Gray {0. mollis, Nutt. herb., forma viscidulo-villosa). 

 Legumina chartacea, ovata seu ovato-oblonga, subinflata. Flores lutes- 

 centes, violaceo sufFusi vel picti, rarius cserulei. Foliola plurijuga, 

 oblongo-lanceolata, baud sei'iceo-canescentia. — Arctic regions to Lab- 



