Chatnactis. COMPOSITJE. 389 



+- Pappus of 4 or sometimes 5 about equal mostly oblong-lanceolate acutish scales, or 

 in the marginal flowers irregular and unequal as well as shorter. 



1. C. lanosa, DC. Whitish with flocoose but deciduous wool, the older leaves 

 becoming glabrous, a span or more high, branched and leafy ouly at the base : the 

 simple naked peduncles therefore long and scape-like, hearing solitary heads : leaves 

 with few narrowly Unear divisions, or the uppermost entire: enlarged marginal 

 corollas with short ovate lobes, hardly surpassing those of the disk. 



Sandy hills, from Monterey to near San Diego. Heads barely half an inch high, on peduncles 

 3 to 6 inches long. 



2. C. glabriuscula, DC. Ligbtly fioccose-woolly, at length somewhat glabrous, 

 branching throughout, a foot or so high : leaves with several rather short thickish 

 obtuse linear divisions : heads on stout rather long peduncles : scales of the involu- 

 cre rather broadly linear and obtuse : marginal corollas with conspicuously enlarged 

 and radiating palmate limb, the lobes oval or oblong. — Var. megacephala, Gray in 

 Pacif. R. Rep. iv. 10-1, is merely a stouter form, with mostly larger heads and 

 flowers ; so is C. denudata, Xutt. PI. Gamb. 177. 



Open grounds, from the Upper Sacramento, and along the foot-lulls of the Sierra to Los 

 Angeles. Rather s'.ont. Heads from half to three fourths of an inch high, inclined to be corym- 

 bose, on peduncles fr.im 2 to 7 inches long. 



3. C tenuifolia, Xutt. Slightly anil delicately woolly when young, becoming 

 nearly glabrous, a span to a foot or more high, leafy and branching to the top: 

 leaves once or somewhat twice pirmately parted into very narrow or filiform lobes : 

 heads somewhat corymbose, on short peduncles : scales of the hemispherical involucre 

 narrowly linear and very numerous: enlarged marginal corollas with short some- 

 what irregular lobes and not surpassing those of the disk. — 0. filifolia, Gray, PI. 

 Fendl. 98. 



Vicinity of San Diego. Heads barely 4 or 5 lines high, broad in proportion, on peduncles of 

 an inrh or less in length. Involucre rather short. Akenes much shorter than in the preceding 

 species. The C.filifolia, described from a single specimen belonging to the Dublin University 

 herbarium, is probably a form of this rather than of the preceding species. 



-t- +- Pappus, at least of the disk-flowers, double, of 4 ordinary and of 1 to 4 ri ry 

 much smaller alternating scales. 



4. C. heterocarpha, Cray. A span to nearly a loot high, lightly and loosely 

 woolly when young, simple or branching above, leafy : [eaves pinnately parted into 



I to 'J narrowly linear unequal divisions: scales of the involucre broadly linear: 

 enlarged marginal corollas with oblong lobes mostly surpassing the disk. — PL 

 Fendl. 98. 



Var. tanacetifolia, Gray. Dwarf, witb bipinnately parted leaves mostly tufted 

 at the base; their lobes numerous, very short, crowded, often oblong or oval : root 

 biennial. — 0. tanacetifolia, Gray, Proc. Am. Acad. vi. 545. 



On the Sacramento and its tributaries, CTkiah, &c, Fremont, Hartweg, Bolander. The vari- 

 ety, Lake Co., near Clear Lake, Bolander. Heads about hall' an inch high: the peduncle an 

 inch or two long. Pappus of the outermost flowers sometimes as in the inner, or irregular and 

 shorter, sometimes much shorter and the small outer scales wauling. 



* * Corollas tehite or fleslircolori I, 



-t- '/'//.■ marginal ones obviously enlarged and somewhat obliquely 5-lobed, but not 

 surpassing the disk : pappus of only I or sometimes 5 usually equal scales: scales 

 of the involucre numerous and narrow-linear. Herbage with minute woolliness 

 which early disappears, then glabrous, minutely granular or glandular above. 



5. C. brachypappa, * irav. Corymbosely branched, a foot high: leaves twice 

 pinnate|\ parted into shorl linear and rather rigid divaricate lol.es: peduncles shorl : 

 scab's of the pappus truncate and almost square or slightly cuneate, one fourth ol 

 the length of the akene. Proc. Am. Acad. viii. 390. 



