—— ie. 
MICROSERIS COMPOSIT A 391 
SCORZONELLA 
hemispherical, inner bracts in one or two series, equal, thin,with 
membraneous margins outer, very short. Receptacle flat. Achenes 
terete, 8-10 costate, witha broad basal callosity whichis hollowed 
at the insertion and produced upward into a sharp denticulate 
scabrous collar-like rim. Palez of the pappus 4-10, usually 5, 
mostly short and tapering into a long or short scabrous awn. 
M. Douglasii Gray Proc. Am. Acad. ix 210. Stems slender, 3-24 
inches high: leaves chiefly clustered at the base of the stem, linear to 
spatulate, entire or sprarinlgy laciniate, 1-5 inches long: involucre oblong 
of 4-10 oblong, obtuse principal bracts and 3-5 very short erose dentate 
calyculate ones at base: achenes oblong-turbinate, contracted under the 
summit, 3 lines long: pale of the pappus, ovate, 2 lines long, tapering 
abruptly into anawn. Southwestern Oregon to California. 
M. Bigelovii Gray |: c. Stems slender, 4-12 inches high: leaves lan- 
ceolate to linear in outline, entire to laciniately toothed or pinnately part- 
ed into linear lobes: involucre campanulate, of 8-10 lanceolate acute or 
acuminate principal bracts and several smaller obtuse or barely acute 
ones at their base: achenes oblong-turbinate, not contracted under the 
truncate summit, 2 lines long, outermost sometimes villous: palez of the 
pappus 5, oblong to lanceolate, gradually tapering to an awn twice or 
thrice their length. Along the coast, Oregon and California. 
100 SCORZONELLA Nutt. Trans. Am. Phil. Soc. vii, 426. 
MICROSERIS § SCORZONFLLA Gray. 
Glabrous perennial herbs with fusiform biennial roots, lacini- 
ately cut leaves and long-peduneled heads of yellow flowers that 
are nodding in bud. Involucre campanulate, its bracts herba- 
ceous, imbricated in several series, the inner long acuminate, the 
other shorter and acute. Receptacle flat or convex. foveolate or 
alveolate. Achenes linear or somewhat turbinate, 8-10-costate or 
striate, truncate at summit, the basal callosity acute and not ex- 
panded, areola lateral. Pappus 5 or 10 ovate or lanceolate pales 
tipped with a generally much longer, straight scabrous or barbel- 
lulate bristle or awn, 
‘S. procera Greene Bull. Cal. Acad. ii, 50. Microseris procera Gray. 
Stems robust, 2-3 feet high: leaves chiefly oblong apiculateg-acuminate, 
dentate or entire, rarely laciniate-lobed; larger cauline 6-8 inches long, 
radical larger: involucre an inch or more high and broad, its bracts in 2 or 
3 series, the outer ones ovate, the inner ones ovate-lanceolate; all acumi- 
nate: achenes nearly columnar 3 lines long, pappus of 10 brownish lanceo- 
late paleze with long. barbellate awns. Rather common in open places, 
Washington to California. 
S. pratensis Greene |. c. 51. Leafy at base only, the scapose pe- 
duncles 1-2 feet high: leaves linear-lanceolate, long-acuminate, entire,6-12 
inches long: heads an inch high and nearly as broad, bracts of the inyolucre 
in 8 series, ovate to lanceolate, acuminate: pappus of 10 white or sorded 
narrowly lanceolate palee with long minutely plumose awns. Moist 
meadow lands near Ashland, Oregon, and Yreka, California 
S. laciniata Nutt. Trans.. Am. Phil Soc. vii, 426. Microseris laciniata 
Gray Glaucescent: stems rather stout, leafy and branching, 2-3 feet high: 
leaves laciniate pinnatifid into attenuate lobes, or sometimes entire; radi- 
cal 4-10 inches long: involucre an inch or less high, its bracts nearly all 
with dilated base and more or less abrupt acumination. Achenes columnar, 
