614 AMML\CEAE 



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

 mm. long: ribs winged; oil-tubes usually 5 in the intervals; stylopodium low. 

 Open hiUsides: Wyo. — ^olo. Submont. — Mont. Jl-Au. 



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

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

 olate, acute divisions: bracts and bractlets solitary- or few, small, linear: 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 decompoimd: leaflets pinnately di\-ided or 

 laciniate into narrowly linear lobes : bractlets 1 or 2, narrowly Hnear ; 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 umbels. Bracts none, or 1 or 2, caducous ; 

 bractlets broad and toothed. Cai\-x-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 nam. long, with 

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

 icoodiae Coult. & Rose. Mountains: Colo. — Wvo. Submont. — Subalp. Je- 

 Au. 



14. BXIPLEtrRUM L. 



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

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

 more ovate bractlets. Cah^s-teeth obsolete. Frtiit oblong, flattened laterally. 

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

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



Plant usuallj" over 1 dm. high; bractlets lanceolate, acute, yellowish green: fruit about 

 5 mm. long. 1. B. americanum. 



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

 fi-uit 3 mm. long; flowers usually purplish. 2. B. 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 hght 

 veUow; 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 laiieeolate 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, Me-^dow Parsnip. 



Smooth caulescent perennials. Leaves simple or temately compound, with 

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

 smalL Cal>'x-teeth prominent. Stylopodium wanting; styles long, erect. 

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

 tubes large, sohtary 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. cor data. 



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, 



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