COULTER AND ROSE—-NORTH AMERICAN UMBELLIFERAE. 447 
solidating into one comprehensive and ill-defined genus a number of 
sharply distinguished groups. We see no reason why the genera 
thus merged should not continue to be recognized as defined in the 
Monograph. 
The following new species and varieties described by Mr. Jones 
under Cymopterus we have had no opportunity to study: 
Cymopterus aboriginum Jones, Contr. Western Bot. 12: 22. 1908. 
Cymopterus aboriginum oblongus Jones, loc. cit. 25. 
Cymopterus aboriginum ovalis Jones, loc. cit. 22. 
Cy:nopterus aboriginum subternatus Jones, loc. cit. 23. 
Cymopterus basalticus Jones, loc. cit. 16. 
Cymopterus humboldtensis Jones, loc. cit. 21. 
Cymnopterus lapidosus deserti Jones, loc. cit. 21. 
Cymopterus owenensis Jones, loc. cit. 26, 
PSEUDOCYMOPTERUS C. & R. Rev. N. Am. Umbell. 20. 1888. 
Pseudocymopterus aletifolius Rydberg, Bull. Torr. Club 31: 574. 1904. 
Pseudocymopterus multifidus Rydb. Bull. Torr. Club 88: 147. 1906. 
Pseudocymopterus montanus multifidus Rydb. Bull. Torr, Club 81: 574. 1904, 
Pseudocymopterus purpureus (C. & R.) Rydb. Bull. Torr. Club 38: 147. 1906. 
Pseudocymopterus sylvaticus A. Nelson, Bull. Torr. Club 28: 224. 1901. 
Pseudocymopterus tenuifolius (A. Gray) Rydb, Bull. Torr. Club 33: 147, 1906. 
Pseudocymopterus tidestromii C. & R. sp. nov. Puate LX XXIII. 
Mostly acaulescent, from a multicipital caudex; leaves once pinnate, usually less 
than 10 cm. long; leaflets ovate to lanceolate in outline, more or less deeply incised 
(this sometimes resulting in a second pinnation), the ultimate lobes narrowly lance- 
olate to linear, sharp-pointed, the lower ones often cleft again; peduncles slender, 
usually less than 20 ecm. long; umbel 8 to 10-rayed, with involucels of numerous 
conspicuous, linear (mucronately tipped) bractlets longer than the deep-yellow 
flowers; rays rather unequal, the longest about 10 mm. long; pedicels about 1 mm, 
long. 
Collected by Ivan Tidestrom on slopes of Mount Terrell, Wasatch Mountains, 
altitude 3,075 meters, August 27, 1908, no. 1811. 
Type U. S. National Herbarium no. 506215. 
Nearest P. multifidus Rydb., but mostly acaulescent and with different leaf dis- 
section. 
EXPLANATION OF PLATE LXXXIII.—a, Plant; b, flower; ¢, dorsal view of carpel; d, cross section 
of immature carpel. a, Natural size; b, c, d, scale 6, 
PLEIOTAENIA C. & R. 
PoLyTAENIA DC. Mém. Ombell. 53. 1829, not PoLtytrarnium Desy. Mem. Soc. Linn. 
Paris 6: 218. 1827. 
Mr. William R. Maxon has called our attention to the fact that the name of the 
Umbelliferous genus Polytaenia had been given to a genus of ferns two years before 
its publication by De Candolle. While some would hesitate to rename Polytaenia 
