and narrow segments, leaf sheaths 3-4 times shorter than the 

 petioles which are shorter than the blades, the whole some- 

 times a foot long; peduncles longer than the leaves, erect and 

 rather stout; stems an inch or two to a foot long, straggling 

 upward ; involucres none ; involucels of linear to subulate long 

 bracts; rays unequal 1-3 inches long, rather many; raylets not 

 longer than the seeds when m.ature; flowers light yellow to 

 white ; fruit mostly oblong in outline rarely oval, 3-4 lines long, 

 dorsal wings gradually reduced from nearly equal to the lat- 

 eral ones to mere rudiments in the latter species ; cross section 

 ot" the wings nearly filiform, sometimes wider at base and 

 subulate and sometimes a knife edge next the seed and a trifle 

 wider above, edge sharp. Middle and Lower Temperate Life 

 Zones growing in the crevices of rocks. The latter species in 

 this group show the same approach to Peucedanum that the 

 alatum group of Peucedanum shows to Cymopterus. though 

 each belongs to its genus in most respects. It is a curious fact 

 that Peucedanum Parryi grows along with or near Cy- 

 mopterus calcareus where the Peucedanoid Cymopterus pe- 

 traeus grows, and Peucedanum triternatum and simplex grow 

 a^ong with or near Cymopterus foeniculaceus where the Cy- 

 n:opteroid Peucedanum anomalum grows, but 1 have never 

 seen anything that could be called a hybrid, as the differences 

 are solely in the fruit. 



The next section of this division is Oreoxis (Raf. 

 S^r. P.ull. Pot. 1 217 (1830) as genus), embracing C. 

 llumboldtianus, C. anisatus, C. bipinnatus, C. alpinus 

 (which includes Oreoxis humilis). C. Bakeri (Oreoxis 

 f.aVen C. & R. Umb. 144, 1900), if that be a good species, 

 >vhich I very much doubt ; O. Hendersoni is evidently a form 

 n, amsatus. This group resembles Pteryxia in many respects, 

 but It is acaulescent and with slender, non-fibrous or fleshy 

 roots It has the same kind of crowns, crowded leaf sheaths and 

 reijoles and cacspitose habit, but leaves narrow and pinnately 

 decompound into minute or linear segments and apiculate, 

 eav-s ascending, small and rigid: it has the same rather rigid 

 linear bracts, but rays often short and pedicels scarcely any or 

 shorter than the seeds, which are not over 2 lines long: ^vings 

 rexl^tr'^ ^ i" *^^ ^^^^^ ^"^ obtuse edged, mostly thickest 

 th tK ^f ^'^^^""^^^y aborted on the face; peduncles longer 

 man tne leaves and nearly erect; alpine or subalpine plants 

 growing in gravel or sometmies as in C. anisatus in thi» crevices 



