T48 COULTER AND ROSE 



named species are A. seatoni C. & R., A. fielsoni C. & R., and 

 probably A. polycarpa C. & R. The fourth Arigelica of the flora is 

 A, fringlei C. & R. 



Angelica polycarpa C. &. R., sp. nov. 



Nearest A. pringlei C. & R., but a stouter plant; leaves much 

 coarser, somewhat pubescent, 6 dm. long including the very long pet- 

 iole, twice or thrice ternate ; leaflets 5 to 7.5 cm. long; rays more 

 numerous (about 40), very unequal, 5 to 7 cm. long; fruit larger, 4 to 

 5 mm. long, with lateral wings thinner and broader (2 mm.), the 

 dorsal and intermediates more prominent especially at base. 



Federal district: on streams at Tlalpam, near City of Mexico, alti- 

 tude 2190 meters, Pr ingle 6467, September 5, 1896. 



Angelica pringlei C. & R. Contr. Nat. Herb. 3 : 295. 1895. 



State of Mexico : by streams, Sierra de las Cruces, altitude 3300 

 meters, Pringle 6147, October 5, 1895. 



32. PRIONOSCIADIUMWatson, Proc. Am.Acad.23: 275. 1888. 



This endemic genus was established by Watson in 1888, and in- 

 cluded three species, P. tnadrense^ P. f}texicana, and P. prmglei. 

 Recent collections have remarkably increased it, no less than twelve 

 additional species being described, and with indications of still others. 

 The genus is justified not only by these additional species, but also by 

 the fact that the earlier known forms were variously referred to such 

 dissimilar genera as Angelica, Peucedamim, and Ciczita. 



As at present understood it contains the following species. 



Synopsis of Specific Groups. 



Main rachis of leaves and its primary branches bearing conspicuous, 

 more or less serrate wings. 

 Leaf-segments obtuse or acute (not acuminate), somewhat regularly 

 serrate or crenate, thickish. 



I. P. cuneatzini', 2. P. serratum. 

 Leaf-segments acuminate, irregularly incised, serrate, thin. 



3. P. acuminatum ; 4. P. nelsoni. 

 Rachis mostly without wings. 



Leaf-segments rather large, oblong to ovate, mostly serrate or 

 crenate, more or less confluent. 



5. P. megacarpu?n ; 6. P. mexicanum ; *] . P. pringlei. 

 Leaf-segments small, lanceolate to ovate in outline, pinnatifid 

 toothed or lobed segments. 



8. P. tnadrense ; 9. P. 7nacrophyllum ; 

 10. P. dissectzcfu ; 11. P. durangense. 

 Leaf-segments elongated, narrowly linear to lance-linear, serrate 

 to pinnately lobed. 



12. P. tvatsoni ; 13. P. linearifolium ; 

 14. P. Jilifoliu7n ; 15. P. tenuifolium. 



