614 AMMIACEAE 



lanceolate divisions; bractlets few, linear-subulate, caducous; fruit elliptic, 5 

 mm. long; ribs winged; oil-tubes usually 5 in the intervals; stj'lopodium low. 

 Open hillsides: Wyo. — Colo. Submont. — Mont. Jl-Au. 



8. L, filicinum S. Wats. Stem 3-10 dm. high, leafy; leaves once or twice 

 ternate, then bipinnate; leaflets pinnatifid into linear or narrowly linear-lance- 

 olate, acute divisions; bracts and bractlets sohtary or few, small, hnear; fruit 

 narrowly oblong, 6-7 mm. long; ribs somewhat winged; stylopodium conic; oil- 

 tubes 3-5 in the intervals. Mountain valleys: Wyo. — ^Utah — Mont. Submont. 

 —Mont. Je-Au. 



9. L. tenuifolium S. Wats. Stem 2-6 dm. high, naked or with a single 

 leaf; leaves ternate, then pinnately decompound; leaflets pinnately divided or 

 laciniate into narrowly linear lobes; bractlets 1 or 2, narrowly linear ; fruit oblong, 

 3-4 mm. long, with narrow ribs; oil-tubes 3-5 in the intervals. Mountain woods: 

 Colo. — Ida. — Ore. Mont. — Subalp. Au. 



14. LIGUSTICELLA Coult. & Rose. 



Low glabrous acaulescent perennials. Leaves simply pinnate. Flowers 

 yellowish green, in few-rayed compact mnbels. Bracts none, or 1 or 2, caducous; 

 bractlets broad and toothed. Calyx-teeth evident; Stylopodium conic. Fruit 

 flattened laterally, glabrous. Oil-tubes 2 or 3 in the intervals, 4 on the commis- 

 sural side. Ribs filiform. Seeds broader than thick; face nearly plane. 



1. L. Eastwoodae Coult. & Rose. Leaves pinnate; leaflets 7-13, oval, or- 

 bicular or obovate, 2- or 3-lobed, again cleft and toothed, 1-1.5 cm. long; bracts 

 0-2; bractlets obovate or cuneate, 3-5-toothed; fruit ovoid, 3 mm. long, with 

 small ribs; stylopodium conic; oil-tubes 2-3 in each interval. Ligusticum East- 

 woodiae Coult. & Rose. Moimtains: Colo. — Wyo. Submont. — Subalp. Je- 

 Au. 



14. BUPLEURUM L. 



Annuals or perennials, with entire, clasping or perfoliate stem-leaves. Flow- 

 ers yellow, in small umbels. Involucres present or wanting; involucels of 5 or 

 more ovate bractlets. Calyx-teeth obsolete. Fruit oblong, flattened laterally. 

 Ribs equal, slender or prominent. Stylopodium prominent and flat. Oil-tubes 

 wanting or continuous around the seed-cavity. Seed-face plane or nearly so. 



Plant usually over 1 dm. liigh; bractlets lanceolate, acute, yellowish green; fruit about 

 5 mm. long. 1- B. amcricanum. 



Plant usually less than 1 dm. high; bractlets obovate or elliptic, obtuse, dark green; 

 fruit 3 mm. long; flowers usually purpUsh. 2. D. purpureum. 



1. B. americanum Coult. & Rose. Perennial, with a woody caudex; stem 

 1-3 dm. high, glabrous; basal leaves linear-lanceolate, tapering into a short 

 petiole, parallel- veined; stem-leaves clasping, oblong to linear; petals light 

 yellow; oil-tubes about 4 in each interval. Mountains: Alaska — Ida. — Wyo. — 

 Mack. Mont. — Subalp. Jl-Au. 



2. B. purpureum Blankinship. Perennial, with a woody caudex; stem 1 

 dm. high or less, glabrous; basal leaves linear-lanceolate, 2-5 cm. long, the cauline 

 ones lanceolate or oblong, clasping; petals purple, rarely yellow; oil-tubes 3 or 

 less in each interval. High mountains: Mont. Mont. — Alp. Jl-Au. 



16. ZIZIA Koch. Alexanders, Meadow Parsnip. 

 Smooth caulescent perennials. Leaves simple or ternately compound, with 

 broad serrate leaflets. Flowers yellow, umbellate. Bracts wanting; bractlets 

 small. Calyx- teeth prominent. Stylopodium wanting; styles long, erect. 

 Fruit flattened laterally, ellipsoid or oblong, glabrous. Ribs filiform. Oil- 

 tubes large, solitary in each broad interval, 2 on the commissural side. Seed 

 pentagonal in cross-section; face plane. 



Basal leaves, at least the earlier ones, simple, cordate. 1. Z. cordala. 



Basal leaves ternate. 2. Z. aurea. 



1. Z. cordata (Walt.) Koch. Stem 3-7 dm. high, glabrous; basal leaf- 

 blades cordate or rounded-cordate, 2-10 cm. long, crenate; stem-leaves ternate, 



