612 AMMIACEAE 



and bract lets; fruit oblong, 3 mm. long, 1 mm. broad; oil- tubes 2-5 in each 

 interval, 6 on the commissure. Meadows and ridges: Ore. — Ida. — Nev. — Calif. 

 Son. My-Jl. 



10. ATENIA H. & A. Yamp, Squaw-root. 



Smooth slender herbs, with tuberous or fusiform-fascicled roots. Leaves 

 pinnate, with few linear or linear-lanceolate divisions. Flowers white. Invo- 

 lucres of few or several bracts, rarely w'anting; involucels present. Calyx-teeth 

 prominent. Stylopodium conic. Fruit orbicular to oblong, flattened laterally. 

 Ribs filiform, inconspicuous. Oil-tubes large and solitary in each interval, 2 

 on the commissural side. Seeds somewhat flattened dorsaUy; face plane. 



Leaflets of all the leaves flliform to linear-lanceolate. 



Leaflets filiform. 1. A. Gairdneri. 



Leaflets linear-lanceolate. 2. A. montana. 



Leaflets of the basal leaves ovate-lanceolate or broadly lanceolate. 3. A. Garrettii. 



1. A. Gairdneri H. & A. Stem 3-10 dm. high; leaves pinnate; leaflets 

 narrowly linear to filiform, 5-15 cm. long; fruit nearly orbicular, usually less than 

 2 mm. long; calyx-teeth ovate, very small; stylopodium low-conic. Carum 

 Gairdneri (H. & A.) A. Gray. Meadows and valleys: Alta. — N.M. — Calif. — 

 B.C. Plain — Subntont. Au-S. 



2. A. montana (Blankinship) Rydb. Stem 8-12 dm. high; leaves 2-3 dm. 

 long, pinnate, with 7-11 leaflets; leaflets often cleft into 1-4 lanceolate or linear- 

 lanceolate divisions; sepals as long as the depressed conic stylopodium; fruit fully 

 2 mm. long, orbicular. Carum montanum Blankinship. Low thickets: Alta. — 

 Wyo. — Ida. Suhmont. Jl-S. 



3. A. Garrettii (A. Nels.) Rydb. Stem 6-8 dm. high, glabrous; basal and 

 lower cauline leaves pinnate, with 3-7 leaflets; leaflets 3-5 cm. long, 1-2 cm. wide, 

 ovate or ovate-lanceolate, entire; upper cauline leaves with narrower leaflets or 

 reduced to broad sheaths; bracts and bractlets filiform-subulate; fruit about 2 mm. 

 long, orbicular; stylopodium low-conic, longer than the sepals. Carum Garrettii 

 A. Nels. Valleys: Utah. Suhmont. Au-S. 



11. BERULA Hoffm. Watkr Parsnip. 



Smooth aquatic perennials, with rootstocks. Flowers white, umbellate. 

 Leaves simply pinnate, with toothed or incised leaflets. Bract and bractlets 

 conspicuous, but narrow. Calyx-teeth minute. Stylopodium conic. Fruit 

 nearly suborbicular, flattened laterally, emarginate at the base, glabrous. Ribs 

 slender, inconspicuous. Oil-tubes numerous and contiguous, closely surrounding 

 the seed cavity. Seeds subterete. 



1. B. erecta (Huds.) Coville. Stem 2-10 dm. high, glabrous; leaves pin- 

 nate, with 11-19 leaflets; leaflets ovate to hnear, sharply serrate, incised or lacini- 

 ately lobed, 1-7 cm. long; fruit scarcely 2 mm. long. B. angustifolia (L.) Mert. 

 & Koch. Swamps and streams: Ont. — 111. — N.M. — Calif. — B.C. Plain — Sub- 

 ynont. Jl-S. 



12. CARUM L. Caraway. 



Biennials or perennials with taproot, leafy-stemmed. Leaves twice or thrice 

 pinnatifid, with filiform divisions. Involucres and involucels present. Flowers 

 white, in many-rayed umbels. Calyx-teeth prominent. Stylopodium conic. 

 Fruit oblong, somewhat flattened laterally. Ribs rather strong. Oil-tubes 

 solitary in the intervals, 2-6 on the commissural side. Seed-face plane. 



1. C. carui L. Stem 3-6 dm. high; leaves 3-4 times pinnatifid, with lance- 

 olate to filiform acute segments; involucres of 1-3 linear bracts; involucels usually 

 none; fruit oblong, about 4 mm. long, with conspicuous ribs. Waste places: 

 Newf. — Pa. — -Colo. — Alta.; escaped from cultivation; native of Europe. Plain 

 —Mont. My-Jl. 



13. LIGtJSTICUM L. 



Smooth caulescent perennials, with large aromatic roots. Leaves large, 

 ternately or ternate-pinnately compound or decompound. Flowers white or 



