Flora of the Palouse Region 185 



2.5 cm. broad: involucre hemispherical, 1-2 cm. high; bracts green, cori- 

 aceous, oblong-lanceolate or ovate, cuspidate, the lowermost leaf-like, entire 

 or nearly so, pubescent: rays usually present, small, scarcely or not exceed- 

 ing the pappus, sterile: akenes smooth, glabrous, flat, 4-nerved: pappus 

 coarse, brownish, nearly as long as the corolla. Kamiack Butte, in open 

 pine woods; very variable. 



A. racemosus Torr. Perennial: stems erect, 60-90 cm. high, sparsely 

 soft-hairy: leaves lanceolate, coriaceous, acute, entire, 5-15 cm. long, the 

 cauliue sessile, the basal petioled, all somewhat scabrous on both surfaces 

 and with sparse pubescence: heads racemosely or somewhat paniculately 

 arranged, mostly long-peduncled: involucre turbinate or campanulate, 

 1-1.5 cm. broad, the well-imbricated bracts linear, acute, pubescent, rigid 

 and coriaceous, green-tipped: rays 6-8 mm. long: akenes pubescent: style- 

 branches filiform: pappus brownish. Hillsides, rather common. Our form 

 is not typical. 



309. SOLIDAGO. 



Perennial herbs: leaves alternate: heads small, mostly in 

 panicles or panicled racemose clusters, radiate, the ray-flowers fer- 

 tile, yellow: involucre imbricated, the bracts usually without her- 

 baceous tips: pappus simple, of a single series of mostly equal and 

 slender scabrous capillary bristles: style-appendages lanceolate or 

 triangular-subulate: akenes terete or angular, 5-12-ribbed. 



Radical leaves spatulate, much longer than the cauline. S. MISSOURIENSIS. 

 Leaves all alike. S. skrotina. 



S. missouriensis Gray. Perennial, tufted, glabrous throughout, 20-60 

 cm. high: radical and lower leaves thickish, spatulate-lanceolate, acute, en- 

 tire or obscurely serrate, 10-15 cm. long, sometimes 2 cm. broad; cauline 

 linear or lanceolate, often somewhat folded, 2-8 cm. long, with much smaller 

 ones fascicled in the upper axils: panicle pyramidal, 8-15 cm. long: heads 

 4-6 mm. high, usually secund on the erect or recurved branches: rays 6-12, 

 small: bracts lanceolate, obtuse, the outermost much shorter. Hillsides, 

 common. 



S. serotina Ait. .Stems stout and tall, 1-1.5 m. tall, very smooth below 

 the inflorescence, the stem often glaucous: leaves lanceolate or oblong-lance- 

 olate, acuminate, prominently 3-nerved, and usually saliently sharply-ser- 

 rate, 6-15 cm. long, smooth on both sides: heads 5-7 mm. high, crowded on 

 the spreading often curved branches of the large pyramidal panicle: bracts 

 thin, linear, obtuse: rays 7— r_f , yellow: akenes pubescent. Common along 

 Snake River, otherwise scarce. 



var. salebrosa Piper, n. var. Leaves harshly scabrous on both surfaces, 

 usually less serrate, otherwise like tile species. This variety is the com- 

 mon SolidagO of the Columbia Basin and extends eastward across the 

 continent. It has been referred to S. canadensis and its varieties and to 

 S. elongata, from both of which its larger heads distinguish it. It differs 

 from S. serotina Ait. ill nowise except for its scabrosity. The type is Piper 

 no. 1580, from Pullman. 



