CARROT FAMILY 623 



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

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



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

 or ovate in outline, bijiinnate; 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. — Suhalp. 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 slightly narrower than the body; dorsal ribs with narrow 

 or no wings. Thaspitun montanum tenuifolium A. Gray. Woody hillsides: 

 Colo.— N.M.— Ariz. Subniont.— 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. — N.M. Subniont. — 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. Mountains: 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 linear-subulate. Calyx-teeth very prominent, one or two of 

 them much larger than the rest. Stylopodimn wanting. P>uit 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 

 dorsally. 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 divisions of the leaves 5-10 mm. long; fruit about 6 mm. long. 



1. P. longiloba. 

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



2. P. anisata. 

 Primary divisions 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 hills: Utah. Son. 



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

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

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

 either prominent or with narrow wings. Pseudocymopterus anisatus Coult. 

 & Rose. Cymopterus asinatus A. Gray. Mountains among rocks: Wyo. — 

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



