Cotula. COMPOSITE. 405 



Through the interior desert, from the Rocky Mountains to the eastern base of the Sierra Nevada ; 

 probably within the borders of the .State. \Vell referred by Prof. Eaton to Artemisia ; but the 

 habit and the woolly akenes are peculiar. 



§ 3. Flowers in tlie head 'all perfect and fertile. — Seriphidium, Besser. 



The N. American species of this section are the true Sage-bushes or Sage-brushes of the interior 

 arid region. Their heads are always few-flowered, generally narrow, and the scales of the invo- 

 lucre little searious. 



A. C'ana, Pursh, the Wild Sage of Lewis and Clarke, or what Pursh took to represent it, is the 

 more northern species, with linear entire leaves, and probably does not nearly approach the 

 borders of California. 



9. A. tridentata, Xutt. Shrubby, a foot to 5 or 6 feet high, bushy-branched, 

 canescent : leaves crowded, cuneate varying to linear-cuneate, obtusely 3-toothed at 

 the truncate apex, or the uppermost entire : heads spicate-clustered on the branches 

 of the compound narrow panicle, obovoid or oblong, 5 - 6-liowered. 



Eastern slope of the Sierra Nevada, from Sonora and Mono Passes, through Nevada and the 

 Rocky Mountains, in immense abundance. The larger stems attain the diameter of 5 or 6 inches 

 in favorable situations. Heads about 2 lines long. 



10. A. trifida, Xutt. Shrubby, a span or two high, in tufts, canescent : leaves 

 linear and entire, or many of them linear-cuneate and deeply cleft into 3 linear 

 lobes : heads more simply spicate, 3 - 8-flowered. 



Kbbett's Pass and Mount Dana (Brewer, Bolander) ; and through Northern Nevada to tho 

 Rocky Mountains ; often accompanying the foregoing. 



11. A. arbuscula, Xutt. Shrubby in dense tufts, barely a span high, very 

 canescent : leaves cuneate, deeply 3-cleft, or the side divisions again 3-lobed ; the 

 lobes from obovate to linear-spatidate : heads loosely spicate, about 8-flowered : outer 

 scales of the involucre more herbaceous and rigid. 



High Sierra Nevada, near Summit Station, E. L. Greeiu. Thence eastward to the Rocky 

 Mountains. 



95. COTULA, Linn. 



Head many-flowered, heterogamous ; one or more rows of marginal flowers pistil- 

 late and apetalous, mostly pedicellate; the proper disk-flowers perfect and either 

 fertile or sterile. Involucre of about two ranks of nearly equal somewhat scarious- 

 margined scales, Receptacle commonly flat or convex, naked, papillose. Disk- 

 corollas short, 4-toothed. Akenes obcompressed, mostly with thick or spongy 

 margins or wings, and notched at summit, destitute of pappus. — Small annuals or 

 some perennials, strong-scented when bruised : with alternate leaves, and solitary 

 slender-peduncled inconspicuous heads of yellow flowers : chiefly of the southern 

 hemisphere, whence two species have reached California. 



1. C. coronopifolia, I. inn. Glabrous, rather succulent: stems creeping and 

 ,. ascending, a span to a foot Long i leaves lanceolate or oblong-linear, laciniate-piu 



natiliil, toothed, or the upper entire, the ba.se or broad petiole clasping or sheathing : 

 marginal and pistillate Bowers in a single series and on long pedicels: disk-flowers 

 on shorter pedicels. 



WVt places around S;m Francisco Bay : doubtless introduced. Now widely diffused over the 

 world, mainly in the southern hemisphere. Bead half an inch in diameter or less. 



2. C. australis, Hook. f. Somewhat hairy: stems slender, diffusely much 

 ^^ branched, a span high : leaves usually twice pinnatelj parted into linear divisions : 



lie, els very small : marginal pistillate Bowers in tw : three ranks, pedicolled : the 



disk-flowers hardly so. Fl. N. Zeal. i. Il's. 



Waste places, San Francisco, Kellogg: also gathered in Oregon by E. Ball. Probably ■* wail 

 from Australia or New Zealand, where ii abounds. 



