244 COMPOSITAE 
peduncles 2-7 cm. long, the involucre Hog turbinate; phyllaries SEmaige , the midvein mo 
prominent in age, 6-10 m oe ng, up to 2 wide, ms ae race 4 near- Tioaceae broadly 
— more or less ay oe ually beco naa na achenes abou g, rsely hi rsute ; 
inner pappus one-half to Pe “fourths the length - the connir: sb often ieee iy so, Mai 
oy outer series 4, abou £0. 5 mm. long, ovate or rounded. 
By en — slopes and Fe oe rans serpentine, Upper Sages Zone; northern Inner 
Coa nges in Sonoma, Lake, Napa, and Yolo Counties, the Hamilton Range and inner slope of the Sierra 
heal Range in Sante Clara County, south through the Inner Coast Ranges of ‘Ses Benite and Monterey Coun- 
ties, California. ite Le age near Clear decay Lake ener: April-June. Serpentine Chaenactis. Inter- 
nge. 
ading with C. tanacetifolia var. gracilenta in its northern r 
nactis Seaarethatia” var. aero (Greene) Stockwell, Contr. Dudley Herb. 3: 124. 1940. (Chae- 
ctis practiakis Greene, Fl. Fran. 447. 1897; C. glabriuse _ Res Big ere tert — Meg e* Calif. 1124. 
1925, as to northern plants only; C. g ula var. gracilen 8.) min arian’ 
soon wit hering, and leaves in which the pinnate Sahagea are — remote; pappus as in the “getrican’: but ane 
outer series often incomplete and much shorter. Open pla Yolo, Lake, and Napa Counties, Califor Typ 
locality : ory ase of Napa County. Intermediate sil ol tanacetifolia var. tanacetifolia and C. Glalitesteta 
var. heterocarpha 
eo wpsteces glabriiscula DC. Common Yellow Chaenactis. Fig. 5401. 
g DC. Pred.:5 + 659. 1836, 
Annual, 1.5-4 dm. high, more or less leafy, Pera stemmed and branching above with 
saree Beiacticn 5 sometimes also branched from the base, the herbage thinly floccose, often be- 
coming glabrate. Basal leaves soon see ara the stem tents es 3-5 cm. long, longer than the inter- 
nodes, pinnately divided to midrib into flat, remote, linear lobes 2-10 m ong, the uppermost 
leaves more reduced and often entire; Race Bh res bro adly turbinate or ‘habehetipels ulate, — ngly 
floccose except at the base, obscurely if at all oviiada yh ananlar* ply llaries 6.5-10 long, 
up to 2 mm. wide, mostly linear-lanceolate, broadly acute to obtuse at 3 e€ rh ierbaccons. ‘rather 
thin in age; marginal flowers conspicuously enlarged ; achenes about ong, appressed-hispid, 
dark or some with pal iz eas ; pappus-paleae equal - Soa me one- sie to three-fourths 
the length of the corolla, usually broadly lanceolate and sometimes o 
Open 4 wooded hill slopes and valleys, Upper Sonoran Zone; Monterey te a ee Counties, Cali- 
fornia, south through the Coast Ranges to Los Angeles and western San Bernardino Counties. Type locality : 
California. Collected by pos as. March—June. 
intergrade freely areas of contact. Those of the mountains of southern California a, where C. glabriuscula 
ar. Siebeiwecs. sig denudata, and var. curta occur, are particularly confusing. 
Key to Varieties 
sau tnt — not concentrated at the base; heads borne on branches of the typically single-stemmed plants. 
er series of pappus-paleae 1—4; plants of northern borders of the Sacramento Valley 
Cc; jaboied coke heterocarpha. 
rd. 
Outer series g (sometimes vestigial); plants of central California southwa 
Heads teigees: ‘etiae 8-11 mm. long 
Seer one-half or over the len oe ‘of the — often obtuse. C. glabriuscula eee 5 
Pal early equaling the corollas, always ac C. glabriuscula megacephala. 
Heads siscathe hy llaries 5-7 mm. lon C. glabriuscula esl 
Leaves many, basal or nearly basal; beads oe on few to several nearly naked stems. 
Heads (including ihe e corollas) about 15 mm. high; plants about 2 dm. high. C. glabriuscula denudata. 
Heads i ~ feroflan) 10-11 mm. high; plants 1-1.5 dm. high. C. glabriuscula lanosa. 
Cha _—_ cula oca4rpha (Torr. & Gray ex A. Gray) H. M. Hall, Univ. Calif. Pub. Bot. 
: 190. 1907, ( “pur heiprocae aye ' “Tor rr. & Gray ex A. Geay: Mem. Kiaes. Acad. Il. 4: 98. 1849.) Habit 
Tike that ae & Bose ks var. glabriuscula but usually more woolly: Speed some achenes of the heads often 
with pale areas; inner sane s-paleae broadly lanceolate, nearly as the disk-corollas, also having an 
bah Rcties eed 1—4 minute paleae. Northern borders of the Sacramento sony California, in Glenn and Tehama 
Counties and from Butte County south to Mariposa County. Type locality: Sacramento Valley. Collected by 
ge Se Hist Soe. 7: var. megacéphala A. Gray in Torr. Pacif. 1857, not A. Gray, 
Proc. Bost. Nat. t. Soc. 7: 146. 1861. beige mac es var. ctr < Bi Sexckeril, "Contr. Dudley 
Herb. 3: 123. 0.) Distinguished from glabriuscula var. glabriuscula only by a rge heads with usually 
larger marginal oe, and broad any eae “28 mor *§ robust habit, by floccose hairs the involucre which are 
a flecked babs — — Bd a oe nearly sauaies ~~ disk- Gade (vestiges of outer 
paleae rarely f achenes nC. uscula var. glabriuscula, Com- 
. Com 
monly bet sto in the lows er foothills f the Gare Pi oa gy California, Pee Am: eet County south to the Bb eg 
Mountains, Kern County; also ao te Mba ig 3b slopes of the — Eg be Valley, where it merges completely with 
c: glabriuscula var. glabriuscula. Type locality: Knights F , Stanislaus County. Weakly separable from the 
name-bearing taxon by the long paleae eis larger size of held i 
Chacnactis ee var. landsa (DC.) H. M. Hall, Univ. Calif. Bot. 3:192. 1907. (Chaenactis 
a be : 659. 1836.) we oad eo 8—-1.5(2) dm. high, densely be! Loma throughout, with several to 
a mart from the base; s basal or nearly basal, linear h few linear divisions or entire; heads 
smaller ‘than C. glabriuscula var. A rakeeing on long gubatnive eg "face Cane Ranges, California, from 
Mon and San Henin t Counties aoe to San Luis Obispo and northeastern Santa Barbara Counties. Type 
iocaltes California. Collected by Dougla 
Chaenactis cake var. ascdiix (Nutt.) Munz, Man. S. Calif. 567. 1935. (Chaenactis denudata 
Nutt. Proc. Acad. Phila. IT. 4: 21. 1848.) b rag like C. glabriuscula var. lanosa in habit but the plants taller, 
leaves more divided, pam larger, and stems more evidently branched. Southern coastal San Luis Obispo She tl 
California, south to Los Minitles County rl eastward to San Gorgonio Pass, Riverside County. Type locality 
Los — Collected by Nuttall. 
carpha var. curta A. Gray, Syn. ai N. Amer. ed. 2. 12: 452. 18 reo? Greene ex Rydb Amer, FI. 
34: 68. 1914; C. glabriuscula var. aurea seen ee Contr. Dudley Nerd. 3: 131. 1940.) Plants no's da high, 
simple or E gpealt bra sa or ig shorter maller sg esis ame-bear shag taxon; pappus-paleae oval to 
broadly obl all Soock sh than the — oe mi of the four sn long: Greenhorn Mountains, Kern 
County. Cakiorna, to iar sheg "Co ounty and south to northern San ven Coane, Type locality: upper part of 
the Santa Clara Valley, Ventura County. In its southern range intergrading with C. tenuifolia. 
