152 COULTER AND ROSE 



Jalisco: near Plateado (no. 2692), near Mesquitec (no. 2568), near 

 Colotlan (nos. 3595, 3675), mountains west of Bolaiios (no. 3706), 

 Rose, in 1897. 



Queretaro : near San Juan del Rio, Prhigle 7175, in 1896. 



Durango : near City of Durango, Palmer 508, in 1896; near El 

 Salto, Nelson 4548, 4571, in 1898. 



Zacatecas : near Valparaiso, E. A. Goldman 13, in 1897. 



13. Prionosciadium linearifolium (Watson) C. & R. Contr. Nat. 

 Herb. 3 : 308. 1S95. 



Ciciita linearifolia Watson, Proc. Am. Acad. 22 : 415. 1887. 



Leaflets narrowly linear, 10 to 15 cm. long, serrate, occasionally 

 lobed at base ; fruit oblong, with narrow wings. 



Jalisco: near Guadalajara, /'^/wcr, in 1896; same station, Pt'mgle 

 2298, in 1888; near San Cristobal, Rose 3039, September 21, 

 1897; on barranca near Guadalajara, Rose & Hottgh 4821, July 

 9, 1899. 



14. Prionosciadium filifolium C. & R., sp. nov. 



Stems rather low, 6 to 9 dm. high, nearly glabrous below, not at 

 all glaucous ; leaves large, ternately much dissected into long filiform 

 leaflets (20 to 45 mm. long) ; the upper ones similar but much re- 

 duced, the uppermost opposite ; inflorescence much branched, some- 

 what scabrous; peduncles short (4 to 5 cm. long) ; rays somewhat un- 

 equal, 2 to 13 cm. long; involucre wanting; involucels of several 

 linear bractlets longer than the pedicels ; fruit somewhat immature, 

 ovate, glabrous, 7 mm. long ; oil-tubes several in the intervals. 



Jalisco: on hillsides between Colotlan and Bolanos, Rose 2834, 

 September 7-9, 1897. 



15. Prionosciadium tenuifolium C. & R., sp. nov. 



Stems rather low, 6 to 12 dm. high, somewhat scabrous roughened 

 throughout ; leaves large, ternately much dissected into linear seg- 

 ments; ultimate segments 10 to 20 mm. long, acute, strongly nerved, 

 scabrous on the veins ; uppermost leaves opposite ; inflorescence much 

 branched ; jDeduncles short, i to 5 cm. long ; rays nearly equal, i to 

 1.5 cm. long; pedicels short; involucre wanting or of a few linear 

 bracts ; involucel of several linear bractlets longer than the pedicels ; 

 fruit immature. 



Jalisco: near Huijuquilla, Rose 2510, August 23, 1897. 



Prionosciadium sp. .? 



Another species was collected at Colomas with large twice ternate 

 then pinnate leaves; leaflets ovate, acute, irregularly serrate, pubescent 

 beneath ; inflorescence glaucous ; flowers purple. 



Sinaloa: Rose 1649, July 14, 1S97. 



Tepic : perhaps also Rose 1982, from between Pedro Paulo and San 

 Blaseto, August 4, 1897, is the same. 



