72 COMPOSITiE. 



SubtrJbe IV. Helenie^. (Baeriece & Euhelcniece, Benth. & Hook., excl. gen.) In- 

 volucre hardly at all imbricated ; its bracts when broad nearly equal or in a single 

 sei'ies. Ligules not persistent. Disk-flowers numerous except in Schkuhria, with 5 

 or rarely 4 teeth or lobes. Akenes few-nerved or angled, or more numerously striate- 

 angled only when turl)inate or pyriform. No oil-glands. {Ilaillarddla, 190, might 

 be sought here.) 



* Anomalous: akenes (as in Perifijl(ia') ilat-compressed, with no lateral nerves, tlie callous- 

 or nerved margins densely ciliate-fringed : rays fertile or none: disk-corolla with dilated 

 limb : style-tips truncate-capitate, with or without a slight cusp. 



137. EATONELLA. Involucre of 5 to 8 oval or oblong obtuse and distinct bracts. Recep- 

 tacle liardly convex. Disk-corollas short. Akeues callous-margined, ciliate with dense very 

 long villosity, outermost obcompressed. Aspect of EriopJnjllnm. 



137a.' CROCKERIA. Involucre and other characters of Lasthenia § Holorjymne. Akenes 

 obovate-oviil, very densely friuged with clavate glandular hairs. — See Supplement. 



* * Baeria type : receptacle conical, mostly In'gh-conical and acute, beset after the akenes 

 have fallen by projecting points (as if pedicels, on which they were inserted) : bracts of 

 the involucre herbaceous, in one or rarely two series and commonly broad, sometimes 

 cupulate-conuate : female flowers ligulate, or sometimes wanting : akenes narrow and 

 from oblong (or in one Monolopid somewhat obovate) to linear, usunlly tapering to the 

 base, few-nerved and angled or nerveless, not callous-margiued : herbage not impressed- 

 punctate nor resinous-atomiferous. 



-}— Involucre (almost always) gamophylhnis and simple, hemisplierical or campannlate : 

 disk-corollas with rather slender tube and dilated tliroat or lindi : anther-tips ovate or 

 oblong : style-tips capitate-truncate or obtuse. 

 143. ERIOPHYLLUM. Akenes slender, and usually witli a paleaceous pappus. 



138. MONOLOPIA. Head con!*picuon.sly radiate, with broad ligules : inner disk-flowers 

 often infertile. Receptacle high-conical. Involucre broad, of one or rarely two series of 

 bracts, which are normally connate by their edges into a several-toothed or lobed hemispheri- 

 cal cup, but sometimes distinct even to the base. Lobes of disk-corollas somewhat l)carded. 

 Akeues obovate or obovate-oblong, quadrangular-compressed or the outer obconqiressed- 

 triaugular, sometimes acute-margined, with small terminal areola, and no ])appus. Floccose- 

 tomentose and alternate-leaved annuals. 



139. LASTHENIA. Head radiate, or discoid by diminution of the ligules: disk-flowers 

 all fertile. Involucre a single series of bracts connate by their edges into a 5-15-toothed 

 glabrous green cup. Disk-corollas 4-5-lobed. Akenes linear or narrowly oblong, com- 

 pressed, slightly 2-3-nerved or nerveless, nearly margiuless, scabro-puberulent or glabrous. 

 Pappus of 5 to 10 firm and subulate-tipped pale;*, or noue. Glabrous and smooth annuals, 

 with opposite entire sessile leaves 



^_ H— Involucre of few or several distinct and thinnish herbaceous bracts in a single series, 

 loose, open at maturity of fruit, not rarely deciduous: disk-corollas with slender tube 

 which equals or exceeds in length the campannlate or cyatliiform 5lobed (rarely 4-lobed) 

 limb : leaves all opposite, sometimes connate at their sessile bases. 



140. BURRIELIA. Head few-flowered, discoid, the 1 to 3 female flowers with ligule 

 wanting or shorter than the style. Involucre cylindraceous, of 3 or 4 narrowly oblong plane 

 bracts. Receptacle slender-subulate. Style-tips short-ovate, rather obtuse. Akenes slen- 

 der, fusiform-linear, flattish. Pappus of 2 to 4 long attenuate-subulate paleae. 



141. BAERIA. Head mostly many -flowered, radiate: rays 5 to 15, conspicuous. Bracts 

 of the campannlate or hemispherical involucre as many, ovate or oblong, plane or becoming 

 somewhat carinate at middle, at least below. Receptacle subulate to high-conical. Style- 

 tips from truncate-capitate, with or without a central apiculation, to ovate and sometimes 

 with a cuspidate appendage. Akenes clavate-linear to linear-cuneate. Pappus a few paleaj 

 or paleaceous awns, or both, often wanting. 



* * # Bahia type : receptacle flat or convex (rarely obtusely conical) : akenes from linear 

 to obpyramidal, rarely 5-augleJ, occasionally with intermediate nerves : flowers (with few 

 exceptions) all fertile. 



