icoMPOsiTAE (composite family) '539 



long: heads very numerous, in small glomerules terminating the stem or 

 branches; involucre campanulate, the bracts hnear, with glabrous, white, acute 

 tips.^Borders of ponds and dsnap places; British Columbia to CaHfomia and 

 the Rbbky" Moimtairts. ' ' ■ : i i ■ 



5. GnaphaUum angustifoUum A. Nels. Bull. Torr. Bot. Club 26: 357. 

 1899. Low annual, t(ranching from the base; stems decumbept-spreading 

 or ,5issurgent, 8-12 cm. long, loosely floccose on the stems and involucres, 

 appressed-pubescent on the leaves: leaves narrowly to broadly hnear,. 2-4 cm. 

 Joflg: the small heads glomerate in the axils, the upper internodes yery short 

 f craning ^ congested ik?.fy duster: hea,ds moderately involved in wool, ^bout 

 3 mm. I high; involucral bracts lanceolate) acutish, the scarious tips white, 

 brownish below: achene roughened with short, cylindrical papillae. — Moist 

 places; Wyoming and Colorado. 



6. Gnaphalitun strictum Gray, Pao. R. Rep. 4: 110. 1858. Appressed- 

 wooUy; stem strict and simple, 1-2 dm. high, sometimes branching or with 

 ascending stems from the base:, leaves all linear, seldom 2 mm. wide: heads 

 in spicately disp'bsed glomerules in the axils or ori short lateral branches; 

 involucral bracts with brownish or somewhat whitish tips, dbtuse. — Rocky 

 Mountain region, froni Wyoming to New Mexico and Arizona. ' 



,!; , „ , ,, , , , 36. MELAMPODIUM L. 



Annual or perennial small caulescent herbs or shrubby plarite; Leaves 

 .opposite; blaides often narrow;, thiqkish,. entire, tootjhed., or pinnatifid. Heads 

 radjajte, apmetimesconspicuops,, , Involucre double, thej oiiter of 4-5 partially 

 unitfd,fla,t bracts, thje. inner a series of bracts each embracing an achene 

 and decidlious 'with it, tjit unai^ned. Receptacle convex or come. Ray- 

 flowers in 1 series, pistillate; ligules white or yellow; disk-flowers perfect 

 but not fruit-producing. Anthers entire at the base. Achenes broadened 

 upward, somewhat incurved. PapJ)US wanting. 



j, 1. Melampodium cinereum DC. Prodr. 5:i 518. 1836. Branched from the 

 jjase,! 1.5-3 dm. high, cinereous or even silvery-canescent witha close pubes- 

 cence, or greener: leaves linear or the lower lanceolate or opatulate, entire or 

 undulate, or even sinuate-pinnatifid: ligules 5 -9, , cuneate-oblong, 2-3-lobed 

 at apex;, 6-12 mm. long; bracts of the involucre ovate, appressed, slightly 

 uniteii^at base; fructifcrojis bracts nearly terete, seimewhat incurved, muri- 

 cate with sharp tubercles ; the hood about the length of the body and very 

 much wider, nearly smooth, the truncate and usually even margin commonly 

 incurved; (Af . leitcanthvm, T: & G.) — Southern (Colorado to Arkansas, Texas, 

 fc,nd Arizona. , , , , 



,; ,; , 37. PARTHENICE Gray ' ,, 



Tall branched annual, Fertile flowers 6-8, with ligule obsolete or reduced 

 to 2 91,3 small'teeth; sterile flowers 40 or 50, with fupnelform corolla. : In- 

 volucre of 5 sonie^v^^t herbaceous .oyal exterior bracts, and of 6 or 8 somewhat 

 .larger; orbicular-o^ovate and more scarious ihteribr ones, these subtending, tlie 

 fertile flowers. Receptacle convex, with linear-oblong or spatulate chaffy 

 bracts spbtending , the outer series of sterile flowers, but mos]tly minute, or 

 walnting to the inner flowers. Achenes oblong-oboyate, glabrous, wingless 

 but a^u'te-rmargined, with an incjirved apiculation, inserted by a Very small 

 .hasp,, falling a^ay at maturity with the involucral and 2 re'ceptacular bracts, 

 bu),,1(t'ese, rMd^ly sepafi^.ting. Pappus none, and coroUa deciduous. 



1. Parthenice mollis Gray,; PL Wrighti 2: 85. 1853. Annual, with odor of 

 Artemisia, 1-2 m. high, paniculately branched, minutely cinereous tlurough- 

 out, wholly destitute of any coarser pubescence: leaves all alternate, ovate, 

 some of the larger (2-3 dm. long) subcordate, acuminate, irregularly or doubly 

 dentate, long-petiojed : heads small, 4 mm,. bi;oad, numerous,, in loose axillary 

 .and terminal somewhat leafy panicles: flowers .greepish-white. — Southeim 

 floWado tQ Arizona. ,, 



