356 UMBELLIFERAE (PARSNIP FAMILY) 



2.5-25 cm. long; pedicels 2-10 mm. long, coalescent at base (giving a "web- 

 footed " appearance): fruit oblong to obovate, glabrous, 4-6 mm. long; dorsal 

 and intermediate ribs thick and slightly elevated; lateral wings as broad as 

 the often much flattened body or broader. Northwestern Wyoming to Oregon 

 and northward. 



4. Angelica Roseana Henderson, Contrib. Nat. Herb. 5: 2Q1. 1899. Low 

 and very stout, 5-6 dm. high, with glabrous and usually purplish stems, and 

 more or less scabrous inflorescence: leaves twice or thrice ternate then pinnate; 

 upper stem leaves reduced, with large inflated petioles; leaflets broadly ovate 

 to lanceolate, thick, with prominent veins, laciniately mucronate-toothed, 

 2.5-3.5 cm. long, obtuse or acute, glabrous or more or less scabrous: umbels 

 with very unequal rays, no involucre (or sometimes 1 or 2 bracts), and in- 

 volucels of few filiform and very scabrous bractlets : flowers greenish or tinged 

 with purple: ovaries glabrous or puberulent: fruit broadly oblong-elliptic, 

 more or less scabrous, 4-5 mm. long; dorsal and intermediate ribs often nearly 

 as prominent as the lateral, thick and corky; stylopodium conical; oil-tubes 

 mostly solitary in the intervals. Subalpine or alpine, among the broken 

 rocks of the cliffs; throughout our range. 



5. Angelica dilatata A. Nels. Contrib. U. S. Nat. Herb. 12: 446. 1909. 

 Glabrous, 5-10 dm. high: lower leaves ternate, then pinnate; the upper simply 

 pinnate or reduced to the greatly dilated petiole which is sometimes tipped 

 with a diminutive biternate leaf; leaflets obovate or ovate, nearly or quite 

 sessile, obscurely and somewhat irregularly serrate, or sometimes with a basal 

 lobe on one side; dilated petioles 10-20 cm. long: umbel about 30-rayed, the 

 involucre wanting or of 1-2 bracts; involucels none; rays 5-8 cm. long: fruit 

 oblong-elliptic, obscurely and sparsely hirsute, less than 5 mm. long; lateral 

 wings broader than the dorsal and intermediate ones; oil-tubes solitary in all 

 the intervals; pedicels unequal, usually much longer than the fruits. Type 

 locality, City Creek Canon, Utah. 



6. Angelica ampla A. Nels. Bull. Torr. Bot. Club 25: 375. 1898. Tall and 

 stout, 15-25 dm. high, with purplish, glabrous stems and puberulent inflores- 

 cence: leaves large, ternate then twice pinnate; leaflets ovate to obovate, 

 short-acuminate, serrate or toothed, 5-20 cm. long: umbels with very nu- 

 merous, nearly equal rays, no involucre, and usually involucels of setaceous 

 bractlets; rays 5-10 cm. long; pedicels 10-12 mm. long: fruit broadly oblong, 

 glabrous, 5-7 mm. long, the dorsal and intermediate ribs sharp (hardly 

 winged), narrower than the thin, very narrow lateral wings; oil-tubes small 

 and numerous, contiguous about the seed and adhering to it with the break- 

 ing down of the pericarp. On stream banks; from southern Wyoming to 

 central Colorado. 



18. PHELLOPTERUS Nutt. 



Acaulescent or short caulescent plants, with pale once or thrice pinnate 

 leaves (segments usually short, broad, crowded, and more or less confluent), 

 mostly conspicuous and similar more or less hyaline involucre and involucels, 

 and purple flowers (except in P. montanus}. Calyx-teeth evident. Fruit 

 oblong to orbicular in outline, glabrous. Carpel with 3-5 broad wings, thin 

 throughout or slightly thickened at insertion, the laterals distinct from those 

 of the carpel ; stylopodium wanting ; oil-tubes usually more than one in the 

 intervals, 4-8 on the commissural side. Seed more or less dorsally flattened, 

 the face with a shallow and broad concavity. Cymopterus in part. 



Flowers white 1. P. montanus. 



Flowers pinkish or purple. 



Involucels with 1-3-nerved bractlets. 



Fruit oblong, 8 mm. long 2. P. bulbosus. 



Fruit orbicular, 10-12 mm. long . . . . . . 3. P. purpurascens. 



Involucels with many-nerved bractlets 4. P. multinervatus. 



1. Phellopterus montanus Nutt. T. & G. Fl. 1: 624. 1840. Flowering um- 

 bels compactly clustered at the base of the rosette of much longer leaves, 



