354 UMBELLIFERAE (PARSNIP FAMILY) 



14. LIGUSTICELLA C. & R. 



Low, glabrous, acaulescent perennials, with small simply pinnate leaves, 

 no involucre (rarely 1 or 2 caducous bracts), involucels of broad toothed 

 bractlets, and yellowish green flowers in few-rayed compact umbels. Calyx- 

 teeth evident. Fruit ovate, flattened laterally, glabrous. Carpel with fili- 

 form ribs, the laterals no more prominent than the dorsals; stylopodium 

 conical; oil-tubes 2 or 3 in the intervals, 4 on the commissural side. Seed 

 considerably broader than thick, with nearly plane face. 



1. Ligusticella Eastwoodae C. & R. Contr. Nat. Herb. 12: 445. 1909. Low, 

 acaulescent, 10-30 cm. high, glabrous: leaves pinnate, 10-15 cm. long; leaflets 

 7-13, opposite, oval, 2-3-lobed, and lobes 2-3-cleft into linear-acute segments: 

 umbel few-rayed, compact, with involucre of 1 or 2 bracts or none, and con- 

 spicuous involucels of bractlets longer than the fruit; rays 4-6 mm. long; 

 pedicels about 2 mm. long: fruit ovate, glabrous, 3 mm. long, with small 

 ribs. Ligusticum Eastwoodae C. & R. 1. c. 3: 320. 1895. In the high moun- 

 tains of southwestern Colorado. 



15. OREOXIS Raf. 



Alpine caespitose perennials, with pinnate leaves usually shorter than the 

 peduncles, no involucre, and involucels of narrow bractlets equaling the 

 yellow flowers. Calyx-teeth prominent. Fruit globose, slightly flattened lat- 

 erally if at all, glabrous or puberulent. Carpel with very thick and prom- 

 inent equal corky ribs, each with a large group of strengthening cells; car- 

 pophore none ; stylopodium wanting ; oil-tubes 1-3 in the very narrow in- 

 tervals, 2 on the commissural side, and a small one in each dorsal rib. Seed 

 sulcate beneath the oil-tubes, with flat or somewhat concave face. 



Glabrous or nearly so; oil-tubes more than 1 in the intervals. 



Involucels linear . . . . . . . . . . 1. O. humilis. 



Involucels conspicuous and toothed . . . . . . 2. O. Bakeri. 



Puberulent; oil-tubes solitary in the intervals . . . . . . 3. O. alpina. 



1. Oreoxis humilis Raf. Ser. Bull. Bot. 217. 1830. Glabrous (sometimes 

 slightly puberulent just below umbel), caespitose, from a somewhat slender 

 elongated root: leaves pinnate, the leaflets cut into 3-7 linear-lanceolate seg- 

 ments: peduncles 2-7.5 cm. high; umbels few-rayed, with involucels of linear, 

 distinct bractlets; flowers bright yellow: fruit 3-4 mm. long; oil-tubes 2-3 

 (rarely 1) in the intervals. High mountains of Central Colorado. 



2. Oreoxis Bakeri C. & R. Contrib. Nat. Herb. 7: 144. 1900. Glabrous 

 throughout except some puberulence at the top of peduncle and on rays, 

 caespitose, from thickish elongated roots: leaflets opposite, 3-5 pairs, some- 

 what distant, 3-5-cleft into linear or linear-lanceolate entire lobes: peduncles 

 longer than the leaves, 3-8 cm. long, erect, or more or less inclined; flowering 

 umbel very compact, almost head-like; fruiting rays nearly equal, 3-5 mm. 

 long; pedicels 2 mm. or less long; involucel of numerous distinct obovate 

 bractlets strongly 3-toothed at apex: fruit 3-4 mm. long, usually purplish; 

 oil-tubes 2-5 in the intervals. High mountains of Colorado. 



3. Oreoxis alpina (Gray) C. & R. 1. c. Puberulent (rarely glabrous), with 

 paler, more dissected leaves and shorter, more crowded leaflets: involucels of 

 somewhat broader bractlets more or less united at base; flowers paler: fruit 

 4-5 mm. long, puberulent (at least when young); oil-tubes solitary in the 

 intervals. Cymopterus alpinus. Colorado and Utah to Wyoming. 



16. CONIOSELINUM Hoffm. 



Glabrous perennials (or inflorescence sometimes puberulent), with ternate 

 then pinnately decompound leaves, ovate-acute , laciniately toothed or lobed 

 leaflets, involucre more or less conspicuous or none, involucels of numerous 

 more or less elongated narrow bractlets, and white flowers. Calyx-teeth ob- 



