OF THE WASATCH REGION 101 



1. S. perplexus di.xpar A. Nelson. (S. dispar A. Nels.) Peren- 

 nial from a short rootstalk, which produces a single, erect, 

 rather stout stern; floccose-woolly when young, but becoming 

 glabrate in age Leaves from oblanceolate or broader and 

 petioled to triangular and sessile above; entire or minutely 

 dentate; usually leathery. Inflorescence with a short-peduncled 

 terminal head and long-peduncled lateral heads. Bracts usually 

 black-tipped. In moist, rich soil. 5.500-10,500 ft. May-Aug. 



2. S. uintahensis (A. Nels.) Greene. An erect perennial. 

 Basal leaves long-petioled, deeply divided, the lobes irregularly 

 and incisely dentate; stem-leaves fewer, similar to the basal 

 but on shorter petioles toward the top until finally sessile. 

 Bracts thin, black-tipped. Dry, gravelly plains and i'n the 

 mountains. May-August. 4.500-9,000 ft. 



3. S. pseudaureus Rydb. Stems a foot high or less; glabrous 

 and glaucescent, from a branching caudex. Leaves obovate 

 in outline, coarsely serrate, about an inch long; tapering to 

 the long, slender petioles. Heads in a close terminal flat- 

 topped corymb. Bracts linear, abruptly acuminate. Rays few, 

 golden-yellow. In light shade near streams. May-June. 

 5.000-7.000 ft. 



19. ACHIL.L.EA. Yarrow; Milfoil. 



Strong-scented herbs, usually with unbranched stems; 

 perennial from slender rhizomes. Leaves alternate, pinnately 

 dissected. Heads many; corymbose. Flowers small; ray-flowers 

 4-5; pistillate, white or pinkish, short; disk-flowers yellow. In- 

 volucre several rows of small, narrow scales. Pappus none. 

 Achenes flattened, margined. Receptacle chaffy. 



1. A. millefolium L. Stem simple or sometimes branched 

 above; pubescence arachnoid or nearly smooth. Leaves lance- 

 olate in outline, bipinnately dissected into many small linear 

 segments. Corymbs cymose, flat-topped, very compound. In- 

 volucral bracts green, becoming brownish-margined when the 

 plant is growing in exposed places. May-September. 



la. A. millefolium Innulosa (Nutt.) Piper. (A, lanulosa 

 Nutt.) Distinguished from the type by the decidedly convex 

 corymb, by the woolly pubescence of the herbage, and by the 

 uniformly green bracts. 



Ib. A. millefolium alpicola (Rydb.) is like A. millefolium lan- 

 ulosa except that it has dark-brown or almost black involucral 

 bracts. It grows at high altitudes (11,000-12,000 ft.) All 

 possible intergradations between these forms can be found. 



20. L.AYIA. (Blepharipappus). 



Annuals, with alternate leaves and usually showy flowers 

 in terminal heads. Bracts herbaceous. Ray-flowers 8-20; 

 white or yellow; pistillate; the rays 3-toothed or lobed. Disk- 

 flowers yellow. Ray-achenes flattened and without pappus; 

 those of the disk-flowers with a pappus of 5-20 capillary 

 bristles. 



1. L,. ui:in<iiiios:i H. & A, (Blepharipappus glandulosus 

 Hook.) Branching from the base; 8-14 inches high. Leaves 

 (and stems) with dark stipitate glands, especially near the 

 flowers; linear or lanceolate; the lower pinnatifid or toothed, 

 the upper entire. Rays large and conspicuous; clear white (or 

 rose-tinged). On dry plains, often under sage-brush. May- 

 June. Locally called "Daisy." 



