OF ARTS AND SCIENCES. 363 



about an inch long, the cauline more oblong and sessile or shortly 

 auriculate-chispiiig : raceme few- (4-G-) flowered : sepals broad, the 

 purplish petals twice longer (3 lines long) : pods reflexed on pedicels 



4 to 6 lines long, attenuate to a short style, 1^ to 2^ inches long by 

 1^ lines broad: seeds somewhat in two rows, orbicular, winged. — 

 Collected on the bluffs of the Snake River and vicinity. Union County, 

 Oregon, by W. C. Cusick, 1881. 



Akabis Cusickii. Perennial, villous-pubcscent throughout with 

 loose scattered spreading simple hairs, the clustered leafy stems 3 to 



5 inches high : lower leaves liuear-oblanceolate, about an inch long, 

 the upper linear-oblong and clasping but not auriculate at base, all 

 entire or sparingly toothed : flowers few, pale pink or white, turning 

 light purple, the petals three or four lines long, twice longer than tlie 

 sepals and exceeding the pedicels : pods falcate, ascending, acutish, 

 1^ to 3 inches long by about a line broad ; style none : seeds acutely 

 margined. — On rocky ridges, Union County, Oregon ; W. C. Cusick, 

 1879. Resembling A. canescens in habit, which is hoary with short 

 dense stellate pubescence, and appears to have much smaller flowers. 



Streptanthus diveksifolius. Annual, glabrous, erect and slen- 

 der, branching above, 1 to 1^ feet high: cauline leaves very narrow, 

 pinnately divided with 1 or 2 pairs of narrowly linear lobes, the upper 

 entire or nearly so-; those on the branches broadly cordate and clasp- 

 ing, entire, ^ inch long or less : racemes few-flowered ; pedicels divari- 

 cately spreading, 1 or 2 lines long : sepals 2 or 3 lines long, pale ; 

 petals with a rather broad exserted recurved blade, purple-veined : 

 pods strongly reflexed, Ih to 2^ inches long by less than a line 

 broad, — On the Cosumne Creek, California ; collected by V. Rattan 

 in 1866. 



Physaria Oregona.* Flowers apparently pale-yellow, the petals 

 (3 or 4 lines iong) twice longer than the calyx : style very short, less 



* The species of Physaria may be distinguished as follows . — 



* Cells of the pod much mflated and much longer than the replum. 



1. P DiDVMOCARPA, Nutt. Cells vef}' obtusc and divergent. — From Colorado 

 to British America and Eastern Washington Territory. 



2. P. Newberryi, Gray. Cells less divergent. — New Mexico to Utah and 

 Nevada 1 An obscure species. 



* * Cells more or less compressed and but little exceeding the replum. 



3. P. Getert, Gray. Pods small, obeordate ; style as long as the pod. — 

 Spokan Valley, Washington Territory 



4. P. Oregona, Watson. Pods large, round-reniform , style very short. — 

 Eastern Oregon. 



