554 COMPOSITAE 
a more than three-fourths as long as the inner ones; ~~ straw- colored or tan, 8-1 
long, about 10- aig slender, columnar-fu yee rm, scabrous towar e apex : POERUS-Pante 
10-30, silvery 1 m. long, rather unequal, each ea in: pete Romans d from a short 
nal awn into a si narrowly palaceous portion about 0. on wide near the tas a=339 
erie slopes po flats in hl often rocky soil, Arid Transition Zon s and canis east of th Cascade 
Range from British Columbia to Sierra County, California: east through ere give g? jd ie’ Snake River 
Plain to southwestern ne eo northern Utah. Type locality: “hills on the Clea River, Oregon 
(now Idaho Tee. ).” April-June. 
ast of the Pacific States, evpscisily 3 in Idaho, N. troxrimoides tends to vary in the direction of N. nigrescens 
(Henders.) Heller, often acquiring the broader, plane, — leaves and glabrous, diffusely speckled outer phyl- 
laries of that species. Nothocalais sine nia itself Bi n wet meadows in the Rocky nen of PB oi 
Montana, and Wyoming; it may oc our the high mountains of northeastern Orego 
152. MICROSERIS* D. Don, Phil. Mag. 11: 388. 1832. 
Caulescent or acaulescent herbs with milky juice, the plants perennial, with 1 or mo 
eshy taproots, or annual. Leaves entire to variously toothed or pinnatifid, i eat or 
iat apace de (villous in section Calocalais). Heads many-flowered, erect or noddi 
in bud, bo singly on naked or remotely bracteate, glabrous or scurfy, scape-like pe- 
e 
Corollas al sie tieh elongate and showy or short and Ww 
or white. Achenes columnar to truncate- Hansa not beaked (or short-beaked in section 
Calocalais), about 10-ribbed, smooth o scabrous, the outermost often densely white- 
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ceenicuinte to plumose. [Name Greek, meaning small c 
i of 16 species, occurring principally in western North America but with a bs sg a in Scie and 
on ey ete id eal y New Zealand. Type species, es nto pygmaea D. Don. Chrom numbers, deter- 
pe A or verified by the contributor, are given where kno 
Plants perennial; fl 1 exceeding the involucre; pappus-part 
Pappu ‘ion ee Srownick — bristles; plants acaulescent, the scapes naked ah rag 08 paconches: (subgenus 
par m) 
ee bert 6-30 ee or tawny, awn-tipped bra plants caulescent, s Ast wey aa leafy above 
ple and only bracteate. (subgenus ae lla ss 
Paces pasts 15-30, bright white, the awns soft, ros ans 
rie tet Btn the awns rather stiff, karen par sirate to barbéliuiate or “ sebclentose then the 
pap 
Pappurpaleze ‘ 10 mm, long, fimbriate at the apex about the base of the awn; awns subplumose, 
tawny. 6. M. sylvati ca. 
Seasgpen ee usually less than 5 mm. long, tapering into the awn or emarginate; awns minutely 
culate to barbellulate, wire tawny 
Pe phyllaries ovate- ‘peg to Laondly ovate or circular, acute or cuspidate, usually gla- 
iata 
brous dorsally, all over 2.5 mm. broad. 3. M. laciniata lacin 
Outer age s linear to si eedaie acute to attenuate, often scurfy- Hicher lent dor- 
dag *'e ldetlent on each head not over 2.5 mm. broad. 
Involuge cy ee or narrowly campanulate, 15—25- aia g 5 ag hon —_ high; Siskiyou 
owellii 
anviners. narrowly one Rapedx campanulate, 25-—75- Moa 10-25 mm. high; Coastal 
re d Cali 
Pergee ruler - 5-1. re mm. long, deltoid or ovate; sg achenes brown; awns white 
. M. laciniata leptosepala. 
Peitie ‘Palene ee — long, lanceolate; inner ee @ pale straw-colored or dul 
white; awns taw 5; . paludosa 
Plants Pormenvedh florets inconspicuous, sanatine or penis exceeding the involucre; pappus-parts 2. 5. (subgenus 
is) 
Heads erect before anthesis; achenes attenuate into a short slender beak; pappus silvery, deciduous. (section 
Calocalats) 7. M. linearifolia. 
Heads inclined or ve pee anthesis; achenes truncate or slightly narrower toward the apex; pappus 
silvery or sordid, p 
Pappus-paleae fiber adie tee: bifid or minutely lacerate at the apex; plants frequently caulescent. 
(section Brachycarpa) 
Achenes columnar, + the apex, gray or straw-colored to brown or bluish may or if blackish 
then equaling a aig in length. 8. M. heterocarpa. 
Achenes Bina k= Fa ag not flared at the apex, blackish, about ty ae ~ Tength of the paleae. 
Pappus-paleae various but if linear- owe sed then entire at the apex, Heiaaty pice into the awn; 
plants acau bee ent. (section Microseris) 
3.0 mm. long or less 
anes Kg argu to chenaieal; the flared apex as broad as or broader than the body of 
I , th t 1 ed. 
ei leae over 2.0 mm, long, the margins strongly incurv: a. i lotphied puasearees 
Paleae 2.0 mm. long or less, flat or the margins lightly per 
. M. elegans. 
hex ributed by by Kenton Lee Chambers. (For complete synonymy of the annual species, see Contr. 
Dudley Herb. 4 a: 283-306. 1955. ) 
