89 
intervals, 8 on the conirnlssnral side: seed strongly flattened 
dorsally, with-angled back, and face but slightly concave, with 
no central ridge. (Fig. 92.) — L. apUfoUnm var. ( ?) minus Gray ; 
Brev/er & Watson, Bot. Calif, i. -264 and ii. 451. 
California, Ostrander’s Meadows (Bolander), Ebbett’s Pass (Breiver), 
Mts. Shasta and Stanford {Hooker cb Gray), Donner Lake (Sonne), Siei'ra 
county (Lemmon), Plumas county {Mrs. Austin); Oregon, Portland 
{Henderson), Willamette Slough (Howell); Washington Territory, Mt. 
Adams (Henderson 378, Siiksdorf) . FI. June. 
The specific name minus is pi eoccupied by Ligusticum minus Lam. 
22. OREOXIS Raf., Seringe, Bull. Bot. Soc. Genev. 1830, 
214. — An alpine cespitose glabrous perennial, with pinnate leaves 
mostly shorter than the pedeuncles, no involucre, and involucels 
of narrow bractlets equalling the yellow flowers. 
The corky-ribbed rather than thin winged fruit, as well as the well- 
developed strengthening cells, are characters which do not belong to 
Cymopterus, the genus to which this form has been referred. The fruit 
bears a closer resemblance to that of Apium or Coelopleurum. 
1. O. humilis Raf. 1. c. Cespitose, from a somewhat slen- 
der elongated root: leaves pinnate, the leaflets cut into 8 to. 7 linear- 
lanceolate mucronate segments: peduncles 1 to 5 inches high: 
umbels few-rayed, with involucels of linear or lanceolate bractlets: 
fruit globose, 2 lines long, with 5 very thick and prominent (but 
not winged) carpel ribs: oil-tubes solitary in the very narrow’ in- 
tervals, 2 on the commissural side, and a small one in each dor- 
sal rib: seed sulcate beneath the oil-tubes, wdth face somew’hat con- 
cave. (Fig. 93.) — Cymopterus alpinus Gray, Am. Jour. Sci. 2. 
xxxiii. 408. 
High mountains of Colorado, at 11,000 feet altitude and upwards. FI. 
July and August. 
23. ^RTHUSA Linn. Gen. n. 355. Poisonous annuals, with 
2 to 3-ternate then pinnate leaves having small and many-cleft 
segments, no involucre, involucels of long narrow bractlets, and 
white flowers. 
iE. C YNAPioM L. is a fetid poisonous European herb, in 
cultivated grounds, from New England and Pennsylvania to Min- 
nesota. (Fig. 94.) FI. June to August. 
