C.IRROT FAMILY 623 



narrow or no wings. Thaspium viontanum A. Gray. Mountain woods: Wyo. — 

 N.M. — Ariz. Submont. — Subalp. Je-Au. 



2. P. sylvaticus A. Xels. Stem glabrous, 3-8 dm. high; leaves few, oblong 

 or ovate in outline, bipinnate; segments linear, acute, long; fruit broadly elliptic, 

 5 mm. long; lateral wings thin, as broad as the body; the dorsal ribs'usually 

 narrowly winged. Woods: Colo. — Wyo. Mont. — Subalp. Je-Jl. 



3. P. tenuifolius (A. Gray) Rydb. Stem 3-6 dm. high; leaves ternate, 

 then pinnatifid into narrowly linear, rather stiff divisions; fruit broadly oval, 5 

 mm. long; lateral ribs shghtly narrower than the body; dorsal ribs with narrow 

 or no wings. Thaspium monlanum tenuifolium A. Gray. Woody hillsides: 

 Colo. — N.M. — Ariz. Submont. — Mont. F-Jl. 



4. P. multifidus Rydb. Stem 1-3 dm. high, few-leaved; leaves twice or 

 thrice pinnatifid into linear divisions; fruit about 4 mm. long, nearly orbicular; 

 lateral wings thick, as broad as the body; dorsal ones narrow. Hills and open 

 woods: Colo. — X.^I. Submont. — Mont. Je-Jl. 



5. P. Tidestromii Coult. & Rose. Mostly acaulescent perennial; leaves 

 pinnate, less than 1 dm. long, bipinnatifid into narrowly lanceolate or linear 

 divisions; peduncles 1-2 dm. high; fruit about 4 mm. long; ribs thick, acute. 

 High mountains: Utah. Subalp. — Alp. Jl-Au. 



6. P. versicolor Rydb. Stem glabrous, about 3 dm. high, few-leaved; leaves 

 1-2 dm. long, broadly ovate in outline, thrice pinnatifid into linear divisions; 

 rays 1-2 cm. long; petals orange, tipped with reddish purple; fruit oval, about 4 

 mm. long; lateral ribs nearly as broad as the body, the dorsal ones narrower. 

 Hillsides: Utah. Mont. 



7. P. purpureus (Coult. & Rose) Rydb. Plant almost acaulescent, 5-15 

 dm. high; leaves less than 1 dm. long, twice to thrice pinnatifid into short oblong 

 or lanceolate divisions; flowers usually dark purple, but sometimes rose or orange, 

 tinged with purple; fruit nearly 5 mm. long, rounded-oval; wings rather thick. 

 P. montanus purpureus Coult. & Rose. Niountains: Ariz. — Utah. Mont. — 

 Subalp. Je-Au. 



31. PSEUDOPTERYXIA. 



Densely cespitose acaulescent strong-scented perennials, with multicipital 

 caudices covered with numerous sheaths of old leaves. Leaves pinnatifid or 

 bipinnatifid, with thick and firm pungent divisions. Flowers yellow; involucres 

 wanting; bractlets hnear-subulate. Calj-x-teeth very prominent, one or two of 

 them much larger than the rest. Stylopodimn wanting. Fruit oblong, glabrous. 

 Dorsal and intermediate ribs sharp or some of them winged, the lateral ones 

 with broad wings, distinct from those of the other carpel. Carpels flattened 

 dorsaUy. Oil-tubes 1-3 in the intervals, 2-4 on the commissural side. Seed-face 

 plane. 



Leaves with long petioles: scape 1-3 dm. high. 



Primary divisions of the leaves once or twice dissected, with narrowly linear divisions. 

 Ultimate di\lsions of the leaves 5—10 mm. long; fruit about 6 mna. long. 



1. P. longiloba. 

 Ultimate divisions of the leaves 3-5 mm. long; fruit about 4 mm. long. 



2. P. anisata. 

 Primary di^-isions broad, cuneate-flabeUate, cleft or toothed, with short, ovate or 



lanceolate teeth. 3. P. aletifolia. 



Leaves on short petioles; divisions linear; scape less than 1 dm. high. 4. P. Hendersonii. 



1. P. longiloba Rydb. Leaves twice pinnatifid, with linear-subulate, 

 pungent divisions; peduncles 2-3 dm. high, stout; fruit about 6 mm. long; lateral 

 wings thick, narrow; some of the wings of the dorsal ribs often fully as broad; 

 calyx-teeth less prominent than in P. anisata. Dry hiUs: Utah. Son. 



2. P. anisata (A. Gray) Rydb. Leaves pinnate, the primary leaflets once 

 or twice pinnatifid, with linear, divergent divisions; peduncles 1-3 dm. high; 

 fruit about 4 mm. long; lateral wings thick, narrower than the bod}'; dorsal ribs 

 either prominent or with narrow wings. Pseudocymopterus anisatus Coult. 

 & Rose. Cymopterus asinatus A. Gray. Mountains among rocks: Wj'o.— 

 Colo. — Utah — Xev. Mont. — Subalp. Je-Jl. 



