264 PROCEEDINGS OF THE AMERICAN ACADEMY 



" Oregon," 148 Hall ; at Summit in the Sierra Nevada, Bolander ; on 

 the Big Tree road at 6,000 feet altitude, 1960 Brewer, and in Eb- 

 bett's Pass at 6,500 to 8,500 feet, 2091 Brewer). The Californian 

 specimens have the leaves more toothed and the cymes larger than the 

 more northern ones. It is said by Mr. Suksdorf to grow at a higher 

 altitude than P. sambucifolia, the fruit differing in shape and darker 

 colored. The seeds are shorter and proportionally broader than those 

 of P. sambucifolia. It appears to be the only form that has been col- 

 lected in California. 



Saxifraga occidentalis. Resembling S. Virginiensis ; leaves 

 often more or less densely rufous-tomentose beneath : inflorescence 

 open, glabrous or somewhat glandular-pubescent : calyx free from the 

 pistils, cleft nearly or quite to the base, the segments very obtuse, not 

 reflexed ; petals white, oblong-obovate, obtuse ; filaments slender : 

 seeds with a loose smooth testa. — From the Rocky Mountains of 

 British America (Drummond) to British Columbia and Vancouver 

 Island (Lyall, Macoun), Oregon (Cusick, Henderson, Howell), and the 

 northern Sierra Nevada (Chico, Mrs. J. Bidwell, Gray). In S. Vir- 

 giniensis the base of the calyx is somewhat broader and the segments 

 acutish, the filaments are somewhat dilated at base, and the seeds are 

 muricate-costate. Though it varies in pubescence the leaves appear 

 to be never densely tomentose beneath, and it is probably not found far 

 west of the Mississippi. S. eriophora of Arizona has seeds similar to 

 those of S. occidentalis and is a close ally, but it differs in the cam- 

 panulate short-lobed calyx which is adnate to the ovary. The seeds 

 of S. rejlexa are somewhat tuberculate-costate. The specific name is 

 given to the species as the western correlative of the common eastern 

 S. Virginiensis. 



HARTWRIGHTIA, Gray. A new genus of Eupatoriacece, of the 

 subtribe Piqueriece. Heads few-flowered. Involucre turbinate-cam- 

 panulate, of few narrow and nearly equal herbaceous bracts, somewhat 

 in two rows, the inner more chaffy. Receptacle convex, with a few 

 bracts near the margin resembling the inner involucral ones. Co- 

 rolla regular, the very short tube and broadly funnelform throat little 

 longer than the obtuse lobes of the limb. Anthers exappendiculate, 

 obtuse, truncate at base. Style-branches long-exserted, linear, slightly 

 thickened above. Achenes obpyramidal, acutely 5-angled, contracted 

 at the summit, where the margin is callously lobed by a thickening of 

 the angles. Pappus none. — A perennial erect herb, with alternate 

 petiolate entire leaves, and loose paniculate corymbs of small heads. 

 Flowers purplish. 



