602 COMPOSITAE 
14. Hieracium pilosélla L. Mouse-ear Hawkweed. Fig. 6048. 
Hieracium pilosella L. Sp. Pl. 800. 1753. 
Stolon oii perennial, the slender stems 5—20 cm. high arising from a rather slender t- 
stock, scapose, rarely with a single leaf, more or less spreading-pubesce h gland-tipped, often 
black hairs 12 ng (those f the stolons small), oblanceolate to spatulate, tapering 
to a petiolar base, entire, pale beneath with a dense stellate pubescence a ith som se 
hairs, green a glabrous exc long setose hairs; heads solitary, yellow- d; in- 
volucres 7-11 igh, the phyllaries stellate-pubescen 
at 
and also with spreading, often gland- 
mm, high, t 
tipped, black hairs, ese lal ith long setose hairs; achenes about 1.5-2 mm. long, the pappus 
exceeding the achene, so 
A European weed spari tor stieRiahad in lawns and waste places, Willamette Valley and Multnomah County, 
Oregon; also introduced in eastern United States. May—Sept. 
174. CREPIS* L. Sp. Pl. 805. 1753. 
Perennial, biennial, or annual herbs; 
stems scapiform or branched. Leaves chiefly 
basal, the cauline alternate, many 
— or deciduous. [From the Greek, meaning sandal, the ancient name of som 
plant. ] 
A genus of 196 species, natives of Eurasia, Africa, and North America. Type species, Crepis biennis L. 
Leaves dentate or parted, not novos or obovate; not dwarf alpine plants. 
troduced annual or biennial species (perennial in ie ipragann 
above capillaris, 
Achenes beaked, the beak slender or sacs 
Perennial; beak filiform, about twice the length of the achen i. rsifolia. 
Annual or biennial; beak n ae fibtotan: about the length ‘of ae ‘bene or slightly Lig: 
Be oi: 
Involucres and stems strongly setose Aged ovale bristles 
Involucres and 
tulose with ne black ee 
re ON aoubveais Saviinastfulta: 
. high; native perennials. 
Stems and leaves ar aE glabrous and glaucous; cauline leaves absent or rem so; plants of moist 
situat 6. C. runcinata, 
Stems and 1 won r less para get = addition to A r058 types of sthacthiee: 1-3 cauline leaves 
ose Rory es C. : iheratur pa); of psig situ 
Herbage and ‘eveluetas wba? Sok ahh gland- duoat bite: outer heared i nia lh -lanceolate. 
Herbage and involucres variously pubescent, if glandular of short hairs only; outer phyllaries 
lanceolate or ovate- or 
r bot mspicuously setose but not sine 
Inflorescence a 1-9 ae sone phyllaries 10-15. . C. modocensis. 
Inflorescence of 6-70 heads; inner phyllaries 5-10. - C. barbigera. 
setae sparse or terra 
Heads 5—10-flowered; aed phyllaries 5-7. 
Cauline leaves 1-3; phyllaries labs or evenly and tad tomentose. 
. C. acuminata. 
pe leaves reduced or weone: phyllaries elabrovs - midportion, conspicuously 
omentose on the margin C. pleurocarpa. 
Heads a flowered; inner i s 8-10. 
Divisions of leaves linear or narrowly lanceolate, mostly entire; achenes greenish. 
12. C. atribarba. 
Pipi Se of dares lanceolate or deltoid, some usually toothed; achenes yellowish or 
Plants ‘mostly 3 dm. or less high; involucres broadly cylindric; heads 12—30- 
owered 
Leaves grayish-tomentulose, not glandular; ee ee not aS parent above. 
1 It. 
Leaves green and glandular; peduncles fistulose Fie ss he yl above. 
Plants mostly 3-6 dm. high; involucres soled” de og es heads 8—10-flowered. 
Se weit 
Leaves all entire or few-toothed, spatulate or obovate; dwarf alpine plants. C. na 
1. Crepis bursifdlia L. Italian Hawksbeard. Fig. 6049. 
Crepis bursifolia L. Sp. Pl. 805. 1753. 
Perennial, 0.5-3.5 dm. high, stems several, decumbent or arcuate, arising from a woody 
caudex and vertical root, E plese: tomentulose, cymosely branched above, bearing 2-14 heads. 
. and text a ed from Babcock and Stebbins (Carnegie Ivst. Pub. No. 504, 1938) and Babcock (Univ. 
Calif. Pub. Bot. 22: 1947), where complete synonymy is also to be found. 
