64 



* * Fknvers yclloxv : fritit-i.v'nigs narrower. 



1'^. P. Parryi Watson, Proc. Am. Acad. xi. 148. Strictly 

 acaulescent, somewhat glaucous, with rather stout peduncles 6 to 

 8 inches high from a stout multicipital caudcx clothed with old 

 leaf-sheaths, puberulent or glabrous: leaves pinnate; leaflets short, 

 pinnatifid below to entire above; ultimate segments very small, 

 ovate and cuspidate: umbel 5 to 10-rayed, with involucels of n few 

 linear-acuminate bractlets; rays i^ to Xy^ inches long; pedicels 2 

 to 4 lines long: calyx-teeth evident: fruit oblong, puberulent or 

 glabrous, 3i^ to ^y lines long, 2 to 3 lines broad, with wings not 

 half as broad as body, and filiform dorsal and intermediate ribs: 

 oil-tubes 3 to ~^ in the intervals, 4 to 10 on the commissural side. 

 (Fig. r)2.) — P. niacrocarpuvi of Parry, Am. Naturalist ix. 271. 

 Mountains of Southern I'tah ( Parrij 7.") and 8,'), Pdhucr 178. Jones 18(14.) 



I'l. P. Oreganum. vSimilar to the preceding species, but a 

 very much reduced cespitose form, not glabrous, with very slender 

 peduncles but 1 to 2 inches high, bearing a ver}' small simple um- 

 bel, or sometimes two nearly sessile umbellets, and one to few 

 matured jDuberulent fruits about 2 lines long; ultimate leaf -seg- 

 ments very small, linear-oblong, not cusjDidatc. (Fig. 53.) 



Alpine rocks. Blue and Eagle Creek Mts., Oregon ( (^'«.s/r/,- 13!»(>, Aug. 

 1886-88.) 



20. P. villosum Nutt. Watson, King's Rep. v. 131. Acau- 

 lescent, more or less tlcnscly pubescent, 3 to 8 inches high: leaves 

 finely dissected, with very numerous narrow crowded segments: 

 umbel som.ewhat e(|uall\- 4 to r)-rayed, with in\olucels of ovate to 

 linear usually ver\' tomentose bractlets; rays about an inch long; 

 pedicels 1 to 3 lines long: fruit oval, somewhat pubescent, 3>^ 

 lines long, 2]^ lines brt)ad, with wings half as broad as body, and 

 piominent dorsal and intermediate ribs: oil-tubes 3 or 4 in the in- 

 tei'vals, 4 on the commissural side: seed-face plane. (Fig. 54.) 



From X. California (J/. K. Curran), W. Nevada, N. Arizona, and New 

 Mexico, to Nebraska, Dakota, and N- W. Teriitory {Macoun, Dmcson). 



Specimens collected by Canby (no. 1 jO) in "Bad Lands," Little Mis- 

 souri, Dakota, June 30, 1883, and by Dawson (no. 218-1) along Pelly Kiver, 

 N. W. T., Juno 2s, 1883, for the first time bring the mature fruit to our 

 knowledge, from which we have drawn the above characters. The fruit 

 becomes smoother with age and may become but sparsely pubescent, in 

 whieli eondition it has been mistaken for P. firnicidaetum. 



