150 COULTER AND ROSE 



flowering branches verticiliate ; peduncles short; inflorescence pubes- 

 cent; involucre none; involucel of sevei'al filiform bractlets ; rays 

 nearly equal, short (2.5 cm. long) ; pedicels 4 mm. long; fruit nearly 

 orbicular, 6 to 8 mm. in diameter, slightly cordate at base, rounded 

 at apex, pubescent; stylopodium depressed; seed-face with a broad 

 concavity; oil-tubes several in the intervals. 



Chiapas: near Tuxtla, altitude 720 to 7S0 meters. Nelson 3079, 



September i to 8, 1895. 

 Morelos : on bluff of barrancas near Cuernavaca, Pringle 6345, 

 June 26 (in flower) and September 18 (in fruit), 1896; same 

 station. Rose & Hough 4399, May 27-30, 1899. 

 This species and P. pringlei are the only two described with pubes- 

 cent fruit. They differ from each other in the shape of the fruit and 

 leaflets, etc. 



5. Prionosciadium megacarpum C. & R. Contr. Nat. Herb. 3: 308. 

 1895. 



Plant 24 to 45 dm. high, the youngest parts pubescent; leaf seg- 

 ments large (12.5 to 20 cm. long), ovate, crenate, sometimes with 

 two lobes at base, paler beneath; fruit 14 to 20 mm. long, wings 

 much broader than body. 



Oaxaca : Sierra de San Felipe, Pri?igle ^6d>S^ in 1894; C/ias. L. 

 Smith 886, in 1894; Conzatti <& Go7tzdlez 305, in 1897. 



6. Prionosciadium mexicanum (Vatke) Watson, Proc. Am. Acad. 23 : 



275. 1888. 



Angelica mexicanu»iYsL\}iL&, Sem. Hort. Barol. 1876 : app. 2. no. 12. 1876. 

 Somewhat pubescent ; leaflets mostly acute ; fruit nearly orbicular, 

 glabrous, 10 to 12 mm. long, with wings much broader than body. 

 Hidalgo : Mineral del Monte, Ehrenberg. 



Mexico: near City of Mexico, L. Hahn 13; Bourgeau 571? in 

 1865-66; Altamirajio 3, 6, 7i 28, in 1890; Pringle 6426, in 

 1896. 

 Guanajuato : near town of Guanajuato, Duges. 

 Zacatecas : near Plateado, Rose 2752, in 1897. 



7. Prionosciadium pringlei Watson, Proc. Am. Acad. 23 : 276. 1888. 

 More pubescent; leaflets mostly obtuse; fruit oblong, somewhat 



pubescent, 8 to 10 mm. long, with wings as narrow as body. 



Chihuahua: La Bufa Mt. above Cusihuiriachic, Pringle 1249, in 



1897. 

 Durango : Nelson 4748, 4971, in 1898. 



8. Prionosciadium madrense Watson, Proc. Am. Acad. 23: 275. 

 1888. 



Plant 6 to 9 dm. high ; leaflets irregularly segmented, the segments 

 narrow, with irregular obtuse lobes, scabrous on the veins as also in 

 the inflorescence ; fruit oblong, with wings about as broad as body. 



