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 flbwers 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. LigusticellaEastwoodaeC.&R.Contr.Nat.Herb.l2: 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. lAgusticum 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 strengtheningi 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 

 suleate 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, 0^hu^liljB. 



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 (soiiife^imes 

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

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

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

 distinct bractlets; flowers bright yellow: fruit 3^ nun. long; oil-tubes 2-3 

 (rarely 1) in the intervals.— ifigh 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 thicki3h elongated roots: leaflets opposite, 3-5 pairs, some- 

 what distant, 3-5-cleft into lineai" 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 mjn. 

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

 intervals. Cymopterus alpinus. — Colorado and Utah to Wyoming. 



16. CONIOSELIHUM Hoffm. 



Glabrous perennials (or inflorescence sometimes jiuberulent), with temate 

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

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

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



