8 . PITTONIA. 



almost ovate and only 2 inches long. This, we know, is in 

 the books as " C. macnkda^'' which it most x)TObab]y is not, in 

 eliaracter or in fact. The second locality is Trinidad, Colorado, 

 near the New Mexican line (17 July, 1889). The plants grew 

 in moist clayey soil along the margin of a reservoir, tlie ulti- 

 mate ramifications of the main roots reaching the level of 

 the water. The leaflets here are narrower, their margins 

 more evenly and serrately notched, the whole plant is of lower 

 and more stocky growth than in the Tehachapi region, and is 

 not perceptibly glaucous. The third habitat is two hundred 

 miles nortli of Trinidad, at a more considerable elevation ; 

 along the rocky margins of the swift-flowing stream called 

 Bear Creek (28 July, 1889). The leaves in these specimens 

 are narrow, with serratures whose spinulose tips spread 

 rather abruptly. Tlie fruits, perhaps not quite mature, are 

 notably smaller than in other specimens, whether from Colo- 

 rado or elsewhere. Along an irrigating ditch at Laramie, 

 Wyoming, I observed but did not collect a plant in all 

 respects like that of the Bear Creek district. These plants 

 of Colorado and Wyoming I place as the type of C. occi- 

 dcnUiUs. They agree among themselves, in root character 

 most perfectly ; in stem, foliage, and in floral character very 

 well. The very different nature of the rc^ot forbids the 

 referring of these plants to either C. virom or C. nidculafa. 



f 



4. C. PUiiPDRATA. Boots, numerous, fleshy and slender- 

 conical, 4 ..r 5 inches long, i to | inch thick at summit, 

 emitting fibrous branches throughout ; accessories as numer- 

 ous, as long, but slender almost to the filifurm, rather tough- 

 fil)rous : stem purple, glaucous, conspicuously striate, 3 to 4 

 feet high, paniculate from the middle : leaves bipinnate ; 

 leaflets ovate-lanceolate, an inch or two long, closely and 

 often deeply serrate, the teeth a little falcate : umbels many, 

 long-peduncled, and like the urabellules bractless or the 

 bracts decidm^us : flowers dull and inconspicuous : fruit 

 orbicular ; ribs of the carpel broad and low ; oil-tubes small. 



Springy and boggy places along the Yakima Biver, near 



