UMBELLIFEKAE (PARSNIP FAMILY) 359 



2. Aulospermum angustum Osterh. Bull. Torr. Bot. Club 31: 358. 1904, 

 Glabrous and glaucous, 20 cm. or more high: leaves glaucous throughout, 

 bipinnate, with crbwded small segments: fruiting peduncles 10-20 cm. long; 

 uinbels 5-rayed or taore, with no involucre and mvolucels of few subulate 

 bractlets; rays about 1 cm. long; pedicels 3-4 mm. long; flowers yellow: fruit 

 6-7 mm. long, the 5 carpel win^s narrow and subequal; oil-tubes 4-5 in the 

 intervals, 6 on the commissural side. — Habitat and range of last. ' 

 '3. Aiilospermum ibapense (Jones)C. &R.,Oontrib. U. S. Nat. Herb. 7: 176. 

 1900. Glabrous and glaucous: leaves tripinnate, the ultimate divisions 

 crowded, oblong, obtuse, with revolute margins: fruiting pedimcles longer 

 than the leaves; umbels 6-8-rayed, with no involucre and involucels of linear 

 acute bractlets; rays about 1 cm. loiig; pedicels 4 mm. long; flowers white: 

 fruit 4-5 mm. long, the 5 carpel wings' broad and thiii; oil-tubes 3 in the in- 

 tervals, 6 on the commissural side. {Cymopterus ■tbapensis Jones, Zoe 3: 302. 

 1893.) — ^Habitat and range of last. ■ ' ' ' 



4. Aulospermum planosiun Osterb. Bull. Torr. Bot. Club 30: 236. 1903. 

 Shortly caulescent, crowned by the numerous widely spreading leaves and 

 peduncles longer than the leaves: flowers purplish: fruit oblong, 6 mm. long. — 

 Colorado. ' 



5. Aulospermum purpureum (Wats.) C' & R. 1. c. 178. Whole plant 

 purplish, nearly acaulescent, glabrous: leaves broadly triangular in outhne, 

 twice or' thrice pinnate, the segments Coarsely mucronate-dentate: peduncles 

 stout, 'exceeding the leaves; umbel unequally 8-12-rayed, with more or less 

 elongated rays and pedicels, mostly no involucre, and mvolucels of lanceolate 

 bractlets united near the base and nearly equaling the yellowish-pmple flowers: 

 fruit 8-10 mm. long, each carpel with 3-5 broad wings scarcely thickened at 

 insertion; oil- tubes 4 or 5 in the intervals, 8 on the commissural side: seed 

 Somewhat flattened, with' broadly concave face. — New Mexico to Colorado 

 and west to Utah and Arizona. 



22. CYMOPTERUS Raf. 



Dwarf, acaulescent, x^rpphytic plants, , with small pinnate or bipinnate 

 leaves, pfj;en no involucre, usually foliacepus. and conspicupus involucels, 

 and white or yellow flowers. Calyx-teeth obsolete or evident. Fruit flat- 

 . tened dorsally, ovate, glabrous. Carpel with dorsal and intermediate ribs 

 filiform or winged ^nd approximate; latera,l wings broad, very thick and 

 corky, with neither nerves ndr'Sti'engthening cells, coherent till maturity 

 ^thj those of. th,e other carpel, forming a hiroad corky margin to the fruit 

 Usually thicker tban the much-flattened fruit body and, in cross section show- 

 ing a ineck-like, connection; ;styloppdium wanting; pil-tubes very, small, 4-8 

 in the interval^,, 8-14 on the, cominissural side. Seed very flat, with plane 

 face. . 1 



Umbelp globose, flowers whitel 



Fruit with 3-5 broad wings on each -carpelt ; ' 

 ., r. Ultimate leaf-segments. narrow and acute i, ... < . . I. C. acaulis. 

 Ultimate leaf-segment short-oblong, obtuse . , 2. C, Parryi. 



Fruit with only the lateral nerves broadly winged . . .' . 3. C. lapidosus. 

 Umbels open, flowers yellow. 



Leaf-segments narrow 4, C, Fendleri. 



Leaf-aegments broad ' . . 5. C. Newberi-yi. 



1. Cymoptcrus acaulis (Pursh) Rydb. Bot. Surv. Nebr. 3: 38. 1894. 

 Low (7-20 cm.) and glabrous, with a short caudex bearing a cluster of leaves 

 and peduncles: leaves merging from pinnate to bipinnate; ultimate segments 

 mostly small and narrow: peduncles mostly shor|;er than the leaves; rays 

 and. pedicels very short, making a, rattier compact cluster; involucel of linear 

 and entire more or less united foliose bractlets;. flowers white: fruit 6-8 mm. 

 in diameter, with 3-5 broad wings on each carpel; oil-tubes small, 4^ in the 

 intervjils (or double the number where a rib hasbeen suppressed), 8-14 on 

 the commissural side. — Fr.om Colorado to Assiniboia. 



2. CjTiiopterus Parryi (C. & R.) Jdnes, Zoe 4: 48. 1893. Resembling C. 



