MEXICAN AND CENTRAL AMERICAN UMBELLIFER^ 



135 



Caulescent, rather stout and somewhat branching. 



Involucel with toothed or lobed bractlets ; ribs very prominent. 



5. T. edulis. 

 Involucel with entire bractlets \ ribs distinct but not prominent. 



6. T. vaginata. 

 Oil-tubes several in the intervals. 



Leaves pinnate. 



Involucel with bractlets not broad or toothed. 

 Leaflets elongated, linear. 



More robust and erect ; leaflets toothed. 



7. T. tnariana. 

 Delicate and more or less prostrate ; leaflets entire. 



8. T. Jnanilis. 

 Leaflets short, ovate. 



9. T. 7nadrensis. 

 Involucel with broad and 

 toothed bractlets. 



10. T. nelsoni. 

 Leaves entire, linear. 



11. T. linearifolia. 



I . Tauschia nudicaulis Schlecht. 

 LinucEa 9 : 608. 1S34. Fig. 5. 



Usually acaulescent, some- 

 times bearing a small leaf near 

 the base, nearly glabrous ; basal 

 leaves numerous, once pinnate ; 

 leaflets 3 to 7 pairs, ovate, serrate 

 or cleft, sometimes 3-parted ; 

 peduncles several, much longer 

 than the leaves, sometimes z<^ 

 cm. long; rays nearly equal, 8 

 to 15 mm. long; fruit 21 mm. 

 long. 



This species is found on the 

 high mountains of Mexico and 

 has been reported from Ecuador, 

 South America {Sprtcce 606^). 

 Mr. Hemsley reports it from be- 

 tween La Joya and San Salvador 

 (^Galeotti)^ and we have seen 

 the specimen collected by T. 

 Coulter (no. 1200) and Rose 

 (no. 4290, May 20, 1899) from 

 mountains near Jalapa. Excel- 

 lent material has recently been 



Fig. 5. Tauschia nudicaulis. 



