MISCELLANEOUS SPECIFIC TYPES. 47 



locality or notes of environment ; so that for type station one 

 may only cite the vicinity of I,ake Maxinkuckee, Ind. The 

 collectiou of the specimens was made by Mr. Clarke on Sept. 

 14, 1906. That part of the characterization, however, which 

 relates to height of the shrub, and its upright habit, is but a 

 repetition of Mr. Clarke's note upon this point. 



The species has a near ally in New England, namely, the 

 Toxicodendro7i glabrum of Philip Miller (1768), long unrecog- 

 nized ; also somewhat recently republished as Rhus liitoralis 

 Mearns.' The New England shrub has a much firmer texture 

 of foliage, and the very scanty pubescence of the lower face of 

 the leaf is of altogether different character. The panicles 

 are larger, with much more numerous drupelets, and these 

 notably large, as well as somewhat pubescent. 



Pyrrocoma cheiranthifolia. Low perennial, stout 

 taproot and branched crown or caudex devoid of wooUiness : 

 basal leaves many, not rosulate but erect, linear-lanceolate, 

 entire, acute, some of the earlier rather broader, narrowly 

 lanceolate, remotely and lightly serrate-toothed : stems scapi- 

 form, only 5 or 6 inches high, strongly decumbent, scarcely 

 leafy, usually monocephalous, occasionally with 2 heads, 

 obscurely villous-arachnoid : involucres turbinate, hardly a 

 half-inch high, their bracts in about 3 series, narrow, acute, 

 largely green-herbaceous, lightly villous-arachnoid ; rays 

 many, large and showy for the plant. 



Common in fields along San Pete River, west of Ephraim, 

 Utah, 7 Sept. 1907, Ivar Tidesdrom, n. 534 as in U. S. Herb. 



Arnica abortiva. Of the size and habit of A. cordifolia, 



but foliage small : basal leaves not seen, the cauline in about 



3 pairs, ovate and deltoid-ovate, dentate, firm, scaberulous and 



sparsely pubescent on both faces, only 1 to J^ inches long, the 



very lowest on long naked petioles, the others on shorter ones 



broadly winged : heads 1 to 3, on long naked or bibractrate 



peduncles : involucre campanulate, Ya. inch high, the bracts 



biserial, the outer lance linear : acuminate, villous-hirsute, the 



^Rhus Httoralis, Mearns, Proc. Biol. Soc. Washington, Vol. 15: p. 

 148 (1902). 



