418 CONTRIBUTIONS FROM. THE NATIONAL, HERBARIUM. 



2. Crepis nana Richards. Alpine hawksbeard. Occasional above timber line, 

 on the highest rock slides. B. C. to Utah, Alta., and Lab.; also in Asia. ( Youngia 

 nana Rydb.) — Plants nearly stemless; leaves long-stalked, rounded, 1 to 2 cm. long, 

 entire or somewhat toothed, thick and succulent, pale, often pxirplish; heads 8 to 11 

 mm. long, often shorter than the leaves, with about 8 bracts. 



The plants are half hidden by the stones among which they grow. 



3. Crepis runcinata (James") Torr. & Gray. Low meadow at east entrance; one 

 plant found in lawn at Many Glacier Hotel. Alta. to Colo, and N. Dak. — Leaves 

 mostly basal, obovate or oblanceolate, 4 to 12 cm. long, usually coarsely toothed, 

 hairy; stems 25 tn 40 cm. high, slender, with few or no leaves; heads about 1 cm. high. 



4. Crepis intermedia A. Gray. Dry hillsides at east entrance; scarce. B. 0. to 

 Calif., Colo., and Sask. — Plants 30 to 50 cm. high, stoiit, somewhat woolly; leaves 

 10 to 15 cm. long, the lobes often toothed; heads 12 to 14 mm. high, very narrow. 



7. HIERACITJM L. Hawkweed. 



Low or tall, hairy perennials; leaves entire or toothed; heads large or small, usually 

 several on each stem; flowers yellow or white. — In explanation of the name hawk- 

 weed, an early author makes the naive statement that the plant "is so called from 

 hawks, as it is said, making use of the juice to clear the eyesight of their young ones; 

 but which sort they use, there being many, liotanists have not yet satisfied us." 



Flowers white 1. H. albiflorum. 



Flowers yellow. 

 Plants without tufts of leaves at base of stem; stems very leafy; bracts unequal. 



Stems long -hairy near the base 2. H. columbianum. 



Stems glabrous or nearly so at the base 3. H. scabriusculum. 



Plants with tufts or rosettes of leaves at base of stem; stems with only a few leaves; 

 bracts equal or nearly so. 



Leaves densely hairy; heads white-hairy 4. H. scouleri. 



Leavesglabrousor nearly so; heads black-hairy 5. H. gracile. 



1. Hieracium albiflorum Hook. White hawkweed. Frequent at low and 

 middle altitudes, on open slopes or in woods or thickets. Yukon to Calif, and 

 Colo. — Plants 30 to 80 cm. high, the stems slender, hairy, with few leaves; lowest 

 leaves oblong or oblanceolate, thinly hairy; heads numerous, 8 to 10 mm. high, 

 in a broad panicle. 



2. Hieracium columbianum Rydb. Occasional at low altitudes, on open or brushy 

 slopes. B. C. and Wash, to Mont.— Stems slender, 20 to 60 cm. high, purplish; 

 stem leaves lanceolate, sessile, sharply toothed; heads few, 10 to 12 mm. high, 

 glabrous or nearly so. 



3. Hieracium scabriusculum Schwein. Occasional at low altitudes, on open 

 slopes or in woods or thickets. B. C. to Oreg. and Wis. — Stems stout, 30 to 70 cm. 

 high, purplish; stem leaves lanceolate or linear-lanceolate, most of them toothed, 

 slightly short-hairy; heads few, 10 to 12 mm. high, broad. 



It is doubtful whether this and H. columbianum are distinct species. 



4. Hieracium scouleri Hook. Frequent on the east slope at low and middle 

 altitudes, on open rocky hillsides. B. C. to Oreg., Utah, and Alta. {H. albertinum 

 Farr.) — Plants 25 to 50 cm. high, often in clumps; leaves oblanceolate or linear- 

 oblanceolate, 5 to 15 cm. long, entire, densely covered with long soft white hairs; 

 heads few, 10 to 12 mm. high. 



In most books the hairs are described as yellow, i)ut on the growing plants they 

 are white; they soon turn yellow in the herbarium. The plant is a handsome one, 

 the contrast between the bright yellow flowers and the white hairs being very 

 pleasing. The heads just before flowering are unusually attractive, their dense 



