62 



Distributed trecniontly as P. cKniifoliiiin- aii.l P. ficniculdrcinn. This 

 species liad become so confused with 7'. tometitoHum that in our first study, 

 p. fo)iie)ito.sum Bentii. being :accepted as a synonym of P. flas;jc(irpum, 

 it was taken as the type of P. da>(i/rarpiim. This leaving the true P. 

 <hi»ycarpum without a name we described it as P. Prin(flei. We have dis- 

 covered since that the true P. tomenicxum is abundantly distinct from the 

 much more abundant P. (Jaxiirnrpum, and hence P. Pr/Hr/?i"/ becomes a 

 synonym under the latter. 



The Asiatic P. ila.Hnritrpnin Kegel k Schmalh. was not published until 

 1S71. 



14. p. tomentosum Benth. PI. Hartw. 812. More or lesr, 

 densely villous-tomentose, somewhat caulescent or scarcely so, a 

 foot or so high: leaves finely dissected into narrow or filiform seg- 

 ments: umbel with 4 to 8 equal rays, with involucels of linear to 

 lanceolate or ovate acuminate bractlets; rays (fertile) 1 to 3 inches 

 long; pedicels 3 to (5 lines long: calyx-teeth evident: fruit ovate to 

 orbicular, densely tomentose, 5 to 9 lines long, 3 to 5 lines broad, 

 with thickish wings from not cjuite as broad as body to broader, 

 and prominent dorsal and intermediate ribs (concealed by the 

 tomentum): oil-tubes mostly 3 in the intervals, 4 on the commis- 

 sural side: seed-face somewhat concave. (Fig. 50.) 



On dry hillsides, Central California. Sometimes distributed as P. vll- 

 JosttmNutt., but more usually as P. dasycarpum Torr. & Gray. This species 

 is by no means as abundantly collected as P dasycarpum. Fine fruiting 

 specimens collected at Elmira, California, by M. K. Curran, first called 

 our attention to the I'act that this is the original P. tomentoKum Benth. and 

 distinct from P. dasycarpum Torr. tt Gray, 



15. P. Mohavense. Having the habit of the preceding 

 species, but with much more strigose pubescent leaves, which are 

 dissected into very small much crowded linear-oblong or obovate 

 obtuse segments: umbel somewhat unequally 6 to 10-rayed, with 

 involucels of linear to l?.nceolate acuminate bractlets; fertile rays 1 

 or 2 inches long; pedicels 2 to 4 lines long: calyx-teeth obsolete: 

 fruit broadly elliptical to almost orbicular, with close fine pubes- 

 cence, 4 to 5 lines long, 3 to 4 lines broad, with wings not as broad 

 as body, and prominent and approximate dorsal and intermediate 

 ribs: oil-tubes 3 or 4 in the intervals, 8 to 10 on the commissural 

 side. 



Yucca, Mojave Desert, California, June, 1884 (M. K. Curran). 

 The fruit of this species is quite different from that of P. tomentosum, 

 to which species it is most closely allied. It is only about half as large, 



